Blount, D.,Minton, G.,Khan, Christin B.,Levenson, Jacob,Dulau, Violaine,Gero, S.,Parham, J.,Holmberg, Jason
Document presented to the Scientific Committee of the International Whaling Commission no. 330, 2020.
Abstract | Links | BibTeX | Tags: Arabian Sea, Artificial intelligence, Flukebook, humpback dolphin, Humpback Whale, Indian Ocean, matching, megaptera novaeangliae, methodology, Oman, photo identification, Sousa chinensis
@techreport{,
title = {Flukebook – Continuing growth and technical advancement for cetacean photo identification and data archiving, including automated fin, fluke, and body matching},
author = {Blount, D.,Minton, G.,Khan, Christin B.,Levenson, Jacob,Dulau, Violaine,Gero, S.,Parham, J.,Holmberg, Jason},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2020/06/sc_68b_ph_06_flukebook-developments-incl-aswn-and-indocet-1.pdf},
year = {2020},
date = {2020-01-01},
journal = {Paper presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {330},
pages = {13},
publisher = {IWC},
institution = {Document presented to the Scientific Committee of the International Whaling Commission},
abstract = {Flukebook (flukebook.org) is a non-profit, open source cetacean data archiving and
photo-identification tool developed under the larger Wildbook platform (wildbook.org) that uses
computer vision and machine learning to facilitate automated identification of individual animals
in the wild. In 2016, the IWC approved funding for the development of a regional data platform
for the Arabian Sea Whale Network (ASWN) to be implemented in collaboration with Wild Me
(wildme.org), the software and machine learning developers of Flukebook. This foundational
collaboration expanded the capabilities of Flukebook and served as the springboard for
subsequent years of growth in data and usage (e.g., by regional consortiums), as well as
significant technical improvements in 2019-2020 in the application of computer vision and
machine learning, specifically for North Atlantic and Southern right whales, humpback whales,
sperm whales, and multiple species of dolphins. Ongoing improvements in our community
support model and technical advances are bringing together industry, governmental, and NGO
collaborators in a global-scale platform for cetacean research.},
keywords = {Arabian Sea, Artificial intelligence, Flukebook, humpback dolphin, Humpback Whale, Indian Ocean, matching, megaptera novaeangliae, methodology, Oman, photo identification, Sousa chinensis},
pubstate = {published},
tppubtype = {techreport}
}
photo-identification tool developed under the larger Wildbook platform (wildbook.org) that uses
computer vision and machine learning to facilitate automated identification of individual animals
in the wild. In 2016, the IWC approved funding for the development of a regional data platform
for the Arabian Sea Whale Network (ASWN) to be implemented in collaboration with Wild Me
(wildme.org), the software and machine learning developers of Flukebook. This foundational
collaboration expanded the capabilities of Flukebook and served as the springboard for
subsequent years of growth in data and usage (e.g., by regional consortiums), as well as
significant technical improvements in 2019-2020 in the application of computer vision and
machine learning, specifically for North Atlantic and Southern right whales, humpback whales,
sperm whales, and multiple species of dolphins. Ongoing improvements in our community
support model and technical advances are bringing together industry, governmental, and NGO
collaborators in a global-scale platform for cetacean research.
Cerchio, S.,Willson, A.,Leroy, E.C.,Muirhead, C.,Al Harthi, S.,baldwin, R,Cholewiak, D.,Collins, T.,Minton, Gianna,Rasoloarijao, T.,Rogers, T.,Sarrouf Willson, M.
A new blue whale song-type described for the Arabian Sea and Western Indian Ocean Technical Report
no. 513, 2020.
Abstract | Links | BibTeX | Tags: acoustic detection, Arabian Sea, balaenoptera musculus, behaviour, Blue whale, breeding grounds, Oman, Passive acoustic detection, song
@techreport{,
title = {A new blue whale song-type described for the Arabian Sea and Western Indian Ocean },
author = {Cerchio, S.,Willson, A.,Leroy, E.C.,Muirhead, C.,Al Harthi, S.,baldwin, R,Cholewiak, D.,Collins, T.,Minton, Gianna,Rasoloarijao, T.,Rogers, T.,Sarrouf Willson, M.},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2020/06/sc_68b_info_28_-new-blue-whale-call-from-oman-2.pdf},
year = {2020},
date = {2020-01-01},
journal = {Report Presented to the Scientific Committee meeting of the International Whaling Commission},
number = {513},
publisher = {IWC},
abstract = {Blue whales in the Indian Ocean (IO) are currently thought to represent two or three subspecies (Balaenoptera musculus intermedia, B. m. brevicauda, B. m. indica), and are structured into four populations with diagnostic song-types. Here we describe a previously unreported song-type that implies the existence of a population that has been undetected or conflated with another population. The song-type was recorded off Oman in the northern IO/Arabian Sea, off the western Chagos Archipelago in the equatorial central IO, and off Madagascar in the southwestern IO. As this is the only blue whale song that has been identified in the western Arabian Sea, we label it the “Oman” song-type to distinguish it from other regionally classified song-types. Spatiotemporal variation at the three sites suggested a distribution west of 70°E, with potential affinity for the northern IO/Arabian Sea, and only minor presence in the southwestern IO. Timing of presence off Oman suggests that intensive illegal Soviet whaling that took 1,294 blue whales in the 1960s likely targeted this population, as opposed to the more widely spread “Sri Lanka” acoustic population as previously assumed. Based upon geographic distribution and potential aseasonal reproduction found in the Soviet catch data, we suggest that if there is a northern Indian Ocean subspecies (B. m. c.f. indica), it is likely this population. Moreover, the potentially restricted range, intensive historic whaling, and the fact that the song-type has been previously undetected, suggests a small population that is in critical need of status assessment and conservation action. },
keywords = {acoustic detection, Arabian Sea, balaenoptera musculus, behaviour, Blue whale, breeding grounds, Oman, Passive acoustic detection, song},
pubstate = {published},
tppubtype = {techreport}
}
Christiansen, F.,Baldwin, R.,Minton, G.,Collins, T.,Sprogis, K. R.,Rudd, J.,al Harthi, S.,Leslie, M.,Macdonald, D. W.,Willson, A.
Assessing the body condition of the world’s only non-migratory humpback whale population, the endangered Arabian Sea humpback whale Technical Report
no. 271, 2020, ISSN: SC_68b_cmp_23_rev1.
Abstract | Links | BibTeX | Tags: Arabian Sea, Body condition, drones, fitness, Humpback Whale, megaptera novaeangliae, Oman, photo identification, photogrammetry, UAV
@techreport{,
title = {Assessing the body condition of the world’s only non-migratory humpback whale population, the endangered Arabian Sea humpback whale},
author = {Christiansen, F.,Baldwin, R.,Minton, G.,Collins, T.,Sprogis, K. R.,Rudd, J.,al Harthi, S.,Leslie, M.,Macdonald, D. W.,Willson, A.},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2020/06/sc_68b_cmp_23_rev1_assessment-of-ashw-body-condition-in-oman-1.pdf},
issn = {SC_68b_cmp_23_rev1},
year = {2020},
date = {2020-01-01},
journal = {Paper presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {271},
pages = {11},
publisher = {IWC},
abstract = {Arabian Sea humpback whales have been a subject of conservation concern in the IWC since 1997. Research conducted primarily off the coast of Oman has contributed to understanding the population’s distribution, abundance, and conservation status, whilst information on the population’s health and specific threats is more limited. This study examines all available images of Arabian Sea humpback whales obtained between 2000 and 2018 for evidence of disease, predation, epizoites and human-induced scarring or injury to individuals. Tattoo-like skin disease was detected in 43.4% of 83 adult whales, with a roughly equal distribution between males and females. The prevalence of the disease was significantly higher in 2012-2018 (51.7%) than in 2000-2011 (24.1%). The lesions persisted for two to 14 years in 10 whales and progressed in prevalence and percentage of body cover in six of them. Killer whale tooth rakes were detected in 12% (95% CI 4.5-18%) of individuals based on examination of photographs showing the ventral surface of tail flukes (n=77), but no cookie cutter shark wounds were detected on any body parts of any of the whales examined. Roughly two thirds (66.6%: 95% CI 52-80%) of individuals represented by good quality photos of the caudal peduncle region (n=42) bore scarring patterns considered likely to be associated with entanglement in fishing gear, with no significant differences in entanglement scarring rates between males and females. Four individuals bore injuries consistent with vessel strikes and at least two individuals showed severe injuries and deformations likely to have been caused by interactions with vessels and/or fishing gear. Five documented entanglement events from Oman and Pakistan involved large-mesh nylon gillnets, which are known to be used extensively throughout the Arabian Sea. In light of this population’s endangered status, these findings indicate an urgent need to continue monitoring Arabian Sea humpback whales, with an emphasis on methods that allow continued and expanded assessment of health, body condition, and anthropogenic interactions, aimed toward designing effective conservation strategies to mitigate known threats. },
keywords = {Arabian Sea, Body condition, drones, fitness, Humpback Whale, megaptera novaeangliae, Oman, photo identification, photogrammetry, UAV},
pubstate = {published},
tppubtype = {techreport}
}
Goes, Joaquim I.,Tian, Hongzhen,Gomes, Helga do Rosario,Anderson, O. Roger,Al-Hashmi, Khalid,deRada, Sergio,Luo, Hao,Al-Kharusi, Lubna,Al-Azri, Adnan,Martinson, Douglas G.
Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region Journal Article
In: Scientific Reports, vol. 10, no. 102, pp. 7422, 2020, ISSN: 2045-2322.
Abstract | Links | BibTeX | Tags: Arabian Sea, HAB, harmful algae, Upwelling
@article{,
title = {Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region},
author = {Goes, Joaquim I.,Tian, Hongzhen,Gomes, Helga do Rosario,Anderson, O. Roger,Al-Hashmi, Khalid,deRada, Sergio,Luo, Hao,Al-Kharusi, Lubna,Al-Azri, Adnan,Martinson, Douglas G.},
url = {https://www.nature.com/articles/s41598-020-64360-2},
doi = {https://doi.org/10.1038/s41598-020-64360-2},
issn = {2045-2322},
year = {2020},
date = {2020-01-01},
journal = {Scientific Reports},
volume = {10},
number = {102},
pages = {7422},
abstract = {The recent trend of global warming has exerted a disproportionately strong influence on the Eurasian land surface, causing a steady decline in snow cover extent over the Himalayan-Tibetan Plateau region. Here we show that this loss of snow is undermining winter convective mixing and causing stratification of the upper layer of the Arabian Sea at a much faster rate than predicted by global climate models. Over the past four decades, the Arabian Sea has also experienced a profound loss of inorganic nitrate. In all probability, this is due to increased denitrification caused by the expansion of the permanent oxygen minimum zone and consequent changes in nutrient stoichiometries. These exceptional changes appear to be creating a niche particularly favorable to the mixotroph, Noctiluca scintillans which has recently replaced diatoms as the dominant winter, bloom forming organism. Although Noctiluca blooms are non-toxic, they can cause fish mortality by exacerbating oxygen deficiency and ammonification of seawater. As a consequence, their continued range expansion represents a significant and growing threat for regional fisheries and the welfare of coastal populations dependent on the Arabian Sea for sustenance.},
keywords = {Arabian Sea, HAB, harmful algae, Upwelling},
pubstate = {published},
tppubtype = {article}
}
Karan, L.,Clark, N.
A Path to Creating the First Generation of High Seas Protected Areas Technical Report
no. 130, 2020.
Abstract | Links | BibTeX | Tags: Arabian Sea, biodiversity, Gulf of Guinea, high seas, Madagascar, Marine Protected Area, Mascarene Islands, migration
@techreport{,
title = {A Path to Creating the First Generation of High Seas Protected Areas},
author = {Karan, L.,Clark, N.},
url = {https://www.pewtrusts.org/en/research-and-analysis/reports/2020/03/a-path-to-creating-the-first-generation-of-high-seas-protected-areas},
year = {2020},
date = {2020-01-01},
number = {130},
pages = {42},
publisher = {Pew Charitable Trusts},
abstract = {Beyond the horizon, more than 200 nautical miles from shore, lies an area of the ocean known as the high seas.
These waters, beyond the jurisdiction of any nation, make up roughly two-thirds of the ocean and cover nearly
half of the planet’s surface. Much is still to be learned about these areas, but scientists know they teem with life
and are among the largest reservoirs of ocean biodiversity. The high seas support abundant fisheries; provide
habitat and migratory routes for whales, sharks, sea turtles, and seabirds; and harbor remarkable ecosystems,
such as deep-water corals and other majestic marine life.
The high seas are also an increasingly busy space; rapid advances in technology and increasing demand for
goods and trade in recent decades mean virtually no part of the ocean—including these waters far from shore—
remains untouched by human industrial activity. Currently, a patchwork of different regional and sectoral
organizations manages this last global common space with little coordination among organizations, and that
is leading to the degradation of the marine environment and its resources. These areas belong to everyone, yet
governments currently have no comprehensive legal mechanism in place to protect high seas marine life.
There is an opportunity for this to change. Negotiations are under way at the United Nations to finalize a new
high seas treaty focused on the conservation and sustainable use of marine biological diversity beyond national
jurisdiction. The treaty could allow nations to establish comprehensive, cross-sector marine protected areas
(MPAs) on the high seas. These areas, when well-managed, can be effective tools in building ocean resilience
to climate change, avoiding fisheries collapse, and preserving biodiversity. Currently, less than 1 per cent of
high seas waters are highly protected, but scientific evidence suggests that protecting at least 30 per cent of
the ocean is more likely to achieve long-term ocean health objectives.1 High seas MPAs can play a key role in
reaching this target.
Although there is much still to discover, scientists have sufficient data and research to begin mapping and
modeling hot spots of biodiversity on the high seas.2 This report identifies some of the special places that could
benefit from protections established under a new high seas treaty. The findings build off a project funded by The
Pew Charitable Trusts and led by scientists at the University of California, Santa Barbara (UCSB) in conjunction
with partners from 13 universities and organizations. Using an algorithm that allows for consideration of
multiple factors, researchers developed a data-driven analysis to identify areas in the high seas of outstanding
conservation value.
The 10 sites highlighted represent areas with a spectrum and combination of important features, such as
species richness, productivity, and habitat diversity. They are located in oceans that span the globe.
This report also includes recommendations to inform the negotiations under way to finalize a new legally
binding international agreement. The agreement should ensure the establishment of effective high seas
protections, including by setting meaningful conservation objectives and requiring enforceable management
plans for these critical waters beyond the jurisdiction of any single nation. },
keywords = {Arabian Sea, biodiversity, Gulf of Guinea, high seas, Madagascar, Marine Protected Area, Mascarene Islands, migration},
pubstate = {published},
tppubtype = {techreport}
}
These waters, beyond the jurisdiction of any nation, make up roughly two-thirds of the ocean and cover nearly
half of the planet’s surface. Much is still to be learned about these areas, but scientists know they teem with life
and are among the largest reservoirs of ocean biodiversity. The high seas support abundant fisheries; provide
habitat and migratory routes for whales, sharks, sea turtles, and seabirds; and harbor remarkable ecosystems,
such as deep-water corals and other majestic marine life.
The high seas are also an increasingly busy space; rapid advances in technology and increasing demand for
goods and trade in recent decades mean virtually no part of the ocean—including these waters far from shore—
remains untouched by human industrial activity. Currently, a patchwork of different regional and sectoral
organizations manages this last global common space with little coordination among organizations, and that
is leading to the degradation of the marine environment and its resources. These areas belong to everyone, yet
governments currently have no comprehensive legal mechanism in place to protect high seas marine life.
There is an opportunity for this to change. Negotiations are under way at the United Nations to finalize a new
high seas treaty focused on the conservation and sustainable use of marine biological diversity beyond national
jurisdiction. The treaty could allow nations to establish comprehensive, cross-sector marine protected areas
(MPAs) on the high seas. These areas, when well-managed, can be effective tools in building ocean resilience
to climate change, avoiding fisheries collapse, and preserving biodiversity. Currently, less than 1 per cent of
high seas waters are highly protected, but scientific evidence suggests that protecting at least 30 per cent of
the ocean is more likely to achieve long-term ocean health objectives.1 High seas MPAs can play a key role in
reaching this target.
Although there is much still to discover, scientists have sufficient data and research to begin mapping and
modeling hot spots of biodiversity on the high seas.2 This report identifies some of the special places that could
benefit from protections established under a new high seas treaty. The findings build off a project funded by The
Pew Charitable Trusts and led by scientists at the University of California, Santa Barbara (UCSB) in conjunction
with partners from 13 universities and organizations. Using an algorithm that allows for consideration of
multiple factors, researchers developed a data-driven analysis to identify areas in the high seas of outstanding
conservation value.
The 10 sites highlighted represent areas with a spectrum and combination of important features, such as
species richness, productivity, and habitat diversity. They are located in oceans that span the globe.
This report also includes recommendations to inform the negotiations under way to finalize a new legally
binding international agreement. The agreement should ensure the establishment of effective high seas
protections, including by setting meaningful conservation objectives and requiring enforceable management
plans for these critical waters beyond the jurisdiction of any single nation.
Minton, Gianna,van Bressem, M. F.,Willson, A.,Collins, T.,Al Harthi, S.,Sarrouf Willson, M.,Baldwin, R.,Leslie, M.,Robbins, J.,Van Waerebeek, K
Visual Health Assessment and evaluation of Anthropogenic threats to Arabian Sea Humpback Whales in Oman Technical Report
Document presented to the Scientific Committee of the International Whaling Commission no. 418, 2020.
Abstract | Links | BibTeX | Tags: Arabian Sea, Barnacle, Bycatch, disease, Fisheries, Humpback Whale, killer whale, lesions, megaptera novaeangliae, Oman, pathology, photo identification, predation, scarring, skin, tattoo
@techreport{,
title = {Visual Health Assessment and evaluation of Anthropogenic threats to Arabian Sea Humpback Whales in Oman},
author = {Minton, Gianna,van Bressem, M. F.,Willson, A.,Collins, T.,Al Harthi, S.,Sarrouf Willson, M.,Baldwin, R.,Leslie, M.,Robbins, J.,Van Waerebeek, K},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2020/06/sc_68b_cmp_16_rev1_visual-health-assessment-of-ashw-in-oman-1.pdf},
year = {2020},
date = {2020-01-01},
journal = {Paper presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {418},
pages = {25},
publisher = {IWC},
institution = {Document presented to the Scientific Committee of the International Whaling Commission},
abstract = {Arabian Sea humpback whales have been a subject of conservation concern in the IWC since 1997. Research conducted primarily off the coast of Oman has contributed to understanding the population’s distribution, abundance, and conservation status, whilst information on the population’s health and specific threats is more limited. This study examines all available images of Arabian Sea humpback whales obtained between 2000 and 2018 for evidence of disease, predation, epizoites and human-induced scarring or injury to individuals. Tattoo-like skin disease was detected in 43.4% of 83 adult whales, with a roughly equal distribution between males and females. The prevalence of the disease was significantly higher in 2012-2018 (51.7%) than in 2000-2011 (24.1%). The lesions persisted for two to 14 years in 10 whales and progressed in prevalence and percentage of body cover in six of them. Killer whale tooth rakes were detected in 12% (95% CI 4.5-18%) of individuals based on examination of photographs showing the ventral surface of tail flukes (n=77), but no cookie cutter shark wounds were detected on any body parts of any of the whales examined. Roughly two thirds (66.6%: 95% CI 52-80%) of individuals represented by good quality photos of the caudal peduncle region (n=42) bore scarring patterns considered likely to be associated with entanglement in fishing gear, with no significant differences in entanglement scarring rates between males and females. Four individuals bore injuries consistent with vessel strikes and at least two individuals showed severe injuries and deformations likely to have been caused by interactions with vessels and/or fishing gear. Five documented entanglement events from Oman and Pakistan involved large-mesh nylon gillnets, which are known to be used extensively throughout the Arabian Sea. In light of this population’s endangered status, these findings indicate an urgent need to continue monitoring Arabian Sea humpback whales, with an emphasis on methods that allow continued and expanded assessment of health, body condition, and anthropogenic interactions, aimed toward designing effective conservation strategies to mitigate known threats. },
keywords = {Arabian Sea, Barnacle, Bycatch, disease, Fisheries, Humpback Whale, killer whale, lesions, megaptera novaeangliae, Oman, pathology, photo identification, predation, scarring, skin, tattoo},
pubstate = {published},
tppubtype = {techreport}
}
Moazzam Khan ,Rab Nawaz, Babar Khan, Sudheer Ahmed.
In: Document presented to the meeting of the Scientific Committee of the International Whaling Commission, vol. SC/68B/CMP/08, no. 170, pp. 11, 2020, ISBN: SC/67A/CMP/05.
Abstract | Links | BibTeX | Tags: Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan
@article{,
title = {Whale Distribution in the Northern Arabian Sea along Coast of Pakistan in 2019 based on the information obtained through Fisheries Crew-Based Observer Programme},
author = {Moazzam Khan ,Rab Nawaz, Babar Khan, Sudheer Ahmed. },
url = {https://www.researchgate.net/publication/341776439_Whale_Distribution_in_the_Northern_Arabian_Sea_along_Coast_of_Pakistan_in_2019_based_on_the_information_obtained_through_Fisheries_Crew-Based_Observer_Programme},
isbn = { SC/67A/CMP/05},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
volume = {SC/68B/CMP/08},
number = {170},
pages = {11},
institution = {Document presented to the Scientific Committee of the International Whaling Commission},
abstract = {In 2012 WWF-Pakistan initiated an observer programme to monitor tuna gillnet operations in the coastal and offshore waters of Pakistan. Among other things, these observers were assigned to report observations of whales encountered during fishing operations. These vessels (with onboard observers) provided a platform of opportunity for recording the spatial and temporal distribution of whales in the Northern Arabian Sea. During 2019 a total of 7 sightings of Arabian Sea humpback whales, 1 sighting each of blue whales and Bryde’s whales, 6 sightings of sperm whales,8 sightings of baleen whales (that could not be identified to species level due to lack of adequate photographic or video evidence) and 3 records of entanglement and mortality of Cuvier’s beaked whales..
Fewer whales were recorded through the programme in 2019 than 2018 and 2017 when a total of 35 and 95 sightings of whale were recorded respectively. This decrease in sightings is attributed to many factors, including early closure of the fishing season in early April 2019 because of low catches and unreliable prices of tuna in the market. As such the fishery was closed for four months from mid-April to mid-August instead of the usual two months of June and July.
Extremely high sea surface temperatures during September to October 2019 (possibly an oceanic heat wave) were believed to be the cause of reduced tuna catches. Therefore, only a few tuna boats remained operational during this period. An unprecedented jellyfish bloom of Crambionella orsini from September 2019 onward forced fishermen to stop fishing operations during this period. Furthermore, the observer programme was completed on September, 2019, after which only 45 out of 75 observers voluntarily continued to provide information about sightings. The paper also reports on two baleen whale strandings - a Bryde’s whale (Balaenoptera brydei) stranded on the rocky shore at Gunz, western coast of Pakistan and a blue whale in Pushukan, Gwadar (West Bay).},
keywords = {Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan},
pubstate = {published},
tppubtype = {article}
}
Fewer whales were recorded through the programme in 2019 than 2018 and 2017 when a total of 35 and 95 sightings of whale were recorded respectively. This decrease in sightings is attributed to many factors, including early closure of the fishing season in early April 2019 because of low catches and unreliable prices of tuna in the market. As such the fishery was closed for four months from mid-April to mid-August instead of the usual two months of June and July.
Extremely high sea surface temperatures during September to October 2019 (possibly an oceanic heat wave) were believed to be the cause of reduced tuna catches. Therefore, only a few tuna boats remained operational during this period. An unprecedented jellyfish bloom of Crambionella orsini from September 2019 onward forced fishermen to stop fishing operations during this period. Furthermore, the observer programme was completed on September, 2019, after which only 45 out of 75 observers voluntarily continued to provide information about sightings. The paper also reports on two baleen whale strandings - a Bryde’s whale (Balaenoptera brydei) stranded on the rocky shore at Gunz, western coast of Pakistan and a blue whale in Pushukan, Gwadar (West Bay).
Aneesh Kumar, K. V.,Baby, Sibi T.,Dhaneesh, K. V.,Manjebrayakath, Hashim,Saravanane, N.,Sudhakar, M.
A Stranding Record of Dwarf Sperm Whale Kogia sima in Lakshadweep Archipelago, India and its Genetic Analogy by Molecular Phylogeny Journal Article
In: Thalassas: An International Journal of Marine Sciences, vol. 35, no. 13, pp. 239-245, 2019, ISBN: 2366-1674.
Abstract | Links | BibTeX | Tags: Arabian Sea, India, Indian Ocean, kogia, kogia simus, stranding
@article{,
title = {A Stranding Record of Dwarf Sperm Whale Kogia sima in Lakshadweep Archipelago, India and its Genetic Analogy by Molecular Phylogeny},
author = {Aneesh Kumar, K. V.,Baby, Sibi T.,Dhaneesh, K. V.,Manjebrayakath, Hashim,Saravanane, N.,Sudhakar, M.},
url = {https://doi.org/10.1007/s41208-018-0115-9},
issn = {2366-1674},
year = {2019},
date = {2019-01-01},
journal = {Thalassas: An International Journal of Marine Sciences},
volume = {35},
number = {13},
pages = {239-245},
abstract = {The distribution of Kogiid whales from the Indian Ocean waters, especially Indian waters are poorly known. It is extremely difficult to differentiate the two species (Kogia sima and K. breviceps) based on their morphological characteristics alone. Our study presents the first confirmed record of dwarf sperm whale Kogia sima from the Indian waters using morphological examinations, skull morphology and molecular identification. The study is based on the stranded animal found in the west coast of Agatti Island in Lakshadweep Archipelago belongs to the Indian EEZ. K. sima showed intra-species genetic variability which confirms the isolation of the species in oceans as the tropical nature of the species restricts its movement.},
keywords = {Arabian Sea, India, Indian Ocean, kogia, kogia simus, stranding},
pubstate = {published},
tppubtype = {article}
}
IWC
Report of the IWC Workshop on Bycatch Mitigation Opportunities in the Western Indian Ocean and Arabian Sea Technical Report
International Whaling Commission no. 124, 2019, ISSN: BMI workshop report 05-19.
Abstract | Links | BibTeX | Tags: Arabian Sea, Bycatch, Entanglement, Indian Ocean, International Whaling Commission, IOTC, mitigation, Pinger
@techreport{,
title = {Report of the IWC Workshop on Bycatch Mitigation Opportunities in the Western Indian Ocean and Arabian Sea},
author = {IWC},
url = {https://archive.iwc.int/pages/view.php?ref=9612&k=},
issn = {BMI workshop report 05-19},
year = {2019},
date = {2019-01-01},
number = {124},
pages = {56},
publisher = {International Whaling Commission},
institution = {International Whaling Commission},
abstract = {The International Whaling Commission (IWC) held a technical workshop on Bycatch Mitigation
Opportunities in the Western Indian Ocean and Arabian Sea from 8-9 May 2019 in Nairobi, Kenya. The
workshop was attended by 50 participants working in 17 different countries, with half of the
participants coming from within the Indian Ocean region. Workshop participants included national
government officials working in marine conservation and fisheries management, cetacean and
fisheries researchers, fisheries technologists, socio-economists and representatives from Regional
Fisheries Management Organisations (RFMOs), inter- and non-governmental organisations. The focal
region of the workshop extended from South Africa, north to the Arabian Sea and east to Sri Lanka,
including coastal areas, national waters and high seas. The primary objectives of the workshop were
to (i) develop a broad-scale picture of cetacean bycatch across the North and Western Indian Ocean
region in both artisanal and commercial fisheries; (ii) explore the challenges and opportunities related
to the monitoring and mitigation of cetacean bycatch in the western and northern Indian Ocean
(Arabian Sea); (iii) identify key gaps in knowledge and capacity within the region and tools needed
address these gaps; (iv) introduce the Bycatch Mitigation Initiative (BMI) to Indian Ocean stakeholders
and assess how the initiative can be of use; (v) identify potential locations which could serve as BMI
pilot projects; (vi) start building collaborations to tackle bycatch at national, regional and international
level.
Presentations included the status of bycatch knowledge at the Indian Ocean scale and current tools
available to assess, monitor and tackle cetacean bycatch. A panel discussion and breakout group
sessions allowed for more in-depth discussion of the knowledge, gaps and challenges to addressing
bycatch shared across the region. Priority areas where cetacean bycatch is known to be occurring –
or considered likely to be occurring - were identified across the region (see summary map below).
The workshop recognised that bycatch is one of the most significant threats to cetacean species and
populations in the Indian Ocean region and concluded that there was an urgent need to raise
awareness of cetacean bycatch at local, national, regional and international scales. The best available
information suggests that very high numbers of animals are caught in medium-scale tuna gillnet
fisheries in the Indian Ocean and Arabian Sea region. Furthermore, despite the general lack of data on
cetacean bycatch regionally, it is likely that high numbers of cetaceans, including vulnerable species
and populations, are caught in the extensive coastal artisanal and small-scale fisheries (net, trap and
line) across the region. The workshop concluded that within the Indian Ocean region there was a need
to focus on gillnets (set and drifting) as the fishing gear most likely to be causing the highest and most
significant bycatch of cetaceans, and for which few effective solutions currently exist.
It was recognised that cetacean bycatch is generally very poorly documented in the region and that
this presents a major barrier to understanding the scale of the issue and making progress towards
bycatch reduction. The workshop concluded that a more systematic assessment of bycatch
information is critical, particularly for small-scale and medium-scale fisheries.
A number of common barriers to tackling bycatch were identified, including: under-reporting of
bycatch by fishers; lack of standardised monitoring programmes which are suitable and financially
viable for small-medium-scale vessels; lack of capacity to carry out bycatch monitoring and reduction
programmes; lack of reporting through RFMOs; lack of sustainable funding to carry out bycatch
reduction programmes; lack of awareness and political will to tackle the issue; lack of capacity and
clarity at national level on the steps, tools and approaches to tackle bycatch; lack of baseline
information on cetacean distribution and abundance; and lack of technical solutions proven to work
on the fisheries in the region.
Given the prevalence of small to medium-scale fisheries using passive fishing gears (gillnets, traps, etc)
across the Indian Ocean region, and the lack of financially viable and effective mitigation solutions for
these gears, the workshop concluded that further work to develop and trial low-cost and low-tech
solutions was urgently needed. The utility of existing tools and approaches for assessing and
8
monitoring bycatch in the numerous small to medium-scale fleets was also recognised, including rapid
bycatch risk assessments, remote electronic monitoring and crew-based observer schemes. The
workshop concluded that bycatch reduction efforts should aim to apply multi-disciplinary and multitaxa approaches wherever possible.
The workshop recognised the need for strong collaboration with fishing communities and the
importance of integrating and collecting information on socio-economic aspects of bycatch into
bycatch reduction programmes. Direct engagement with the seafood supply chain, certification
schemes and the culinary community can be a part of rewarding fishers who are working to reduce
bycatch, thereby incentivising participation in bycatch mitigation programs. The workshop concluded
that bycatch reduction programmes should aim, as far as is possible, to support the livelihoods of
fishing communities, and that this should also be considered when exploring options for alternative
livelihoods. It was also recognised that within this region that cetaceans can be the target of directed
catch, or that incidentally caught cetaceans can be used as bait or food, meaning that the term
‘bycatch’ is less well defined.
The workshop participants acknowledged the vital role for Regional Fisheries Management
Organisations (RFMOs) in tackling bycatch and that raising the profile of cetacean bycatch, and the
need to address it, within the context of the Indian Ocean Tuna Commission (IOTC), and the Southwest
Indian Ocean Fisheries Commission (SWIOFC) and their contracting parties should be prioritised. It
recognised that underreporting of bycatch at IOTC remains a challenge. The workshop concluded that
there was an opportunity for the BMI to act as a catalyst to ensure more engagement on cetacean
bycatch and to communicate the relevant research priorities at future meetings.
The workshop noted that the regional focus of the meeting had helped collate existing information on
bycatch and that such an approach was potentially useful for other regions. It agreed that until now
there had not been an international body to champion cetacean bycatch mitigation, and that the IWC’s
Bycatch Mitigation Initiative could collaborate with and where appropriate assist other organisations,
RFMOs and national governments interested in tackling bycatch in a number of ways. The suggested
role and activities for the BMI includes the collaborative development of a regional road map for
tackling cetacean bycatch and a framework for more sustainable funding of bycatch work,
strengthened engagement with RFMOs in the region (e.g. IOTC and SWIOFC) and the provision of
training and technical assistance and development of toolboxes. These activities are envisaged as part
of a collaboration between the IWC and other relevant bodies and organisations that are already
working to tackle bycatch (e.g. the FAO, RFMOs, other IGOs and NGOs) and relevant national
governments and experts.
In light of these conclusions the workshop made the following recommendations as the next steps
across the region in order to progress cetacean bycatch reduction efforts. },
keywords = {Arabian Sea, Bycatch, Entanglement, Indian Ocean, International Whaling Commission, IOTC, mitigation, Pinger},
pubstate = {published},
tppubtype = {techreport}
}
Opportunities in the Western Indian Ocean and Arabian Sea from 8-9 May 2019 in Nairobi, Kenya. The
workshop was attended by 50 participants working in 17 different countries, with half of the
participants coming from within the Indian Ocean region. Workshop participants included national
government officials working in marine conservation and fisheries management, cetacean and
fisheries researchers, fisheries technologists, socio-economists and representatives from Regional
Fisheries Management Organisations (RFMOs), inter- and non-governmental organisations. The focal
region of the workshop extended from South Africa, north to the Arabian Sea and east to Sri Lanka,
including coastal areas, national waters and high seas. The primary objectives of the workshop were
to (i) develop a broad-scale picture of cetacean bycatch across the North and Western Indian Ocean
region in both artisanal and commercial fisheries; (ii) explore the challenges and opportunities related
to the monitoring and mitigation of cetacean bycatch in the western and northern Indian Ocean
(Arabian Sea); (iii) identify key gaps in knowledge and capacity within the region and tools needed
address these gaps; (iv) introduce the Bycatch Mitigation Initiative (BMI) to Indian Ocean stakeholders
and assess how the initiative can be of use; (v) identify potential locations which could serve as BMI
pilot projects; (vi) start building collaborations to tackle bycatch at national, regional and international
level.
Presentations included the status of bycatch knowledge at the Indian Ocean scale and current tools
available to assess, monitor and tackle cetacean bycatch. A panel discussion and breakout group
sessions allowed for more in-depth discussion of the knowledge, gaps and challenges to addressing
bycatch shared across the region. Priority areas where cetacean bycatch is known to be occurring –
or considered likely to be occurring - were identified across the region (see summary map below).
The workshop recognised that bycatch is one of the most significant threats to cetacean species and
populations in the Indian Ocean region and concluded that there was an urgent need to raise
awareness of cetacean bycatch at local, national, regional and international scales. The best available
information suggests that very high numbers of animals are caught in medium-scale tuna gillnet
fisheries in the Indian Ocean and Arabian Sea region. Furthermore, despite the general lack of data on
cetacean bycatch regionally, it is likely that high numbers of cetaceans, including vulnerable species
and populations, are caught in the extensive coastal artisanal and small-scale fisheries (net, trap and
line) across the region. The workshop concluded that within the Indian Ocean region there was a need
to focus on gillnets (set and drifting) as the fishing gear most likely to be causing the highest and most
significant bycatch of cetaceans, and for which few effective solutions currently exist.
It was recognised that cetacean bycatch is generally very poorly documented in the region and that
this presents a major barrier to understanding the scale of the issue and making progress towards
bycatch reduction. The workshop concluded that a more systematic assessment of bycatch
information is critical, particularly for small-scale and medium-scale fisheries.
A number of common barriers to tackling bycatch were identified, including: under-reporting of
bycatch by fishers; lack of standardised monitoring programmes which are suitable and financially
viable for small-medium-scale vessels; lack of capacity to carry out bycatch monitoring and reduction
programmes; lack of reporting through RFMOs; lack of sustainable funding to carry out bycatch
reduction programmes; lack of awareness and political will to tackle the issue; lack of capacity and
clarity at national level on the steps, tools and approaches to tackle bycatch; lack of baseline
information on cetacean distribution and abundance; and lack of technical solutions proven to work
on the fisheries in the region.
Given the prevalence of small to medium-scale fisheries using passive fishing gears (gillnets, traps, etc)
across the Indian Ocean region, and the lack of financially viable and effective mitigation solutions for
these gears, the workshop concluded that further work to develop and trial low-cost and low-tech
solutions was urgently needed. The utility of existing tools and approaches for assessing and
8
monitoring bycatch in the numerous small to medium-scale fleets was also recognised, including rapid
bycatch risk assessments, remote electronic monitoring and crew-based observer schemes. The
workshop concluded that bycatch reduction efforts should aim to apply multi-disciplinary and multitaxa approaches wherever possible.
The workshop recognised the need for strong collaboration with fishing communities and the
importance of integrating and collecting information on socio-economic aspects of bycatch into
bycatch reduction programmes. Direct engagement with the seafood supply chain, certification
schemes and the culinary community can be a part of rewarding fishers who are working to reduce
bycatch, thereby incentivising participation in bycatch mitigation programs. The workshop concluded
that bycatch reduction programmes should aim, as far as is possible, to support the livelihoods of
fishing communities, and that this should also be considered when exploring options for alternative
livelihoods. It was also recognised that within this region that cetaceans can be the target of directed
catch, or that incidentally caught cetaceans can be used as bait or food, meaning that the term
‘bycatch’ is less well defined.
The workshop participants acknowledged the vital role for Regional Fisheries Management
Organisations (RFMOs) in tackling bycatch and that raising the profile of cetacean bycatch, and the
need to address it, within the context of the Indian Ocean Tuna Commission (IOTC), and the Southwest
Indian Ocean Fisheries Commission (SWIOFC) and their contracting parties should be prioritised. It
recognised that underreporting of bycatch at IOTC remains a challenge. The workshop concluded that
there was an opportunity for the BMI to act as a catalyst to ensure more engagement on cetacean
bycatch and to communicate the relevant research priorities at future meetings.
The workshop noted that the regional focus of the meeting had helped collate existing information on
bycatch and that such an approach was potentially useful for other regions. It agreed that until now
there had not been an international body to champion cetacean bycatch mitigation, and that the IWC’s
Bycatch Mitigation Initiative could collaborate with and where appropriate assist other organisations,
RFMOs and national governments interested in tackling bycatch in a number of ways. The suggested
role and activities for the BMI includes the collaborative development of a regional road map for
tackling cetacean bycatch and a framework for more sustainable funding of bycatch work,
strengthened engagement with RFMOs in the region (e.g. IOTC and SWIOFC) and the provision of
training and technical assistance and development of toolboxes. These activities are envisaged as part
of a collaboration between the IWC and other relevant bodies and organisations that are already
working to tackle bycatch (e.g. the FAO, RFMOs, other IGOs and NGOs) and relevant national
governments and experts.
In light of these conclusions the workshop made the following recommendations as the next steps
across the region in order to progress cetacean bycatch reduction efforts.
Moazzam, Mohammed,Nawaz, Rab,Khan, B.,Ahmed, S.
no. 169, 2019.
Abstract | Links | BibTeX | Tags: Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan
@techreport{,
title = {The Distribution of Whales in the Northern Arabian Sea along the Coast of Pakistan Obtained through Crew-Based Observer Programme- Results of the 2018 fishing season},
author = {Moazzam, Mohammed,Nawaz, Rab,Khan, B.,Ahmed, S.},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2020/07/sc_68a_cmp_07_whale-sightings-from-pakistan-crew-based-observer-programme-1.pdf},
year = {2019},
date = {2019-01-01},
urldate = {2019-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
volume = {SC/68A/CMP/07},
number = {169},
pages = {11},
abstract = {Sightings of whales made by WWF-Pakistan’s Crew Based Observers deputed on tuna gillnet vessels operating along Pakistan’s coast were reported for the 2018 fishing season. A total of 13 sightings of Arabian Sea humpback whales, 2 sightings of blue whales, 1 sightings of Bryde’s whales, 4 sightings of sperm whales and 15 sightings of baleen whales (that could not be identified to species level due to lack of adequate photographic or video evidence) were made during 2018. The number of whales recorded for the year 2018 is much less than 2017 when a total of 95 sightings of whale were recorded from the area. This decrease in sighting is attributed to early closure of fishing season in late April 2018 because of extremely low prices of tuna in the market. Usually a voluntary two month close season is observed between June and July, however, the new fishing season was started in September 2018. The close season, therefore, remained effective for about four months (May to August). In addition, a major part of tuna fishing fleet operated in the further offshore waters (known to have thin population of whales) to avoid checking by Government agencies for implementation on various legislation during November- December 2018. },
keywords = {Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan},
pubstate = {published},
tppubtype = {techreport}
}
Mohsenian, Nazanin,Moshiri, Hamed,Tollab, Amin,Bargahi, Hamid Reza,Braulik, Gill T.,Gemmell, Georgina L.,Collins, Tim
Confirmed sightings of the Killer Whale, Orcinus orca, in Iranian waters (Mammalia: Cetacea) Journal Article
In: Zoology in the Middle East, vol. 65, no. 171, pp. 280-282, 2019, ISBN: 0939-7140.
Links | BibTeX | Tags: Arabian Gulf, Arabian Sea, Iran, killer whale, Orcinus orca, Persian Gulf
@article{,
title = {Confirmed sightings of the Killer Whale, Orcinus orca, in Iranian waters (Mammalia: Cetacea)},
author = {Mohsenian, Nazanin,Moshiri, Hamed,Tollab, Amin,Bargahi, Hamid Reza,Braulik, Gill T.,Gemmell, Georgina L.,Collins, Tim},
url = {https://doi.org/10.1080/09397140.2019.1596590},
issn = {0939-7140},
year = {2019},
date = {2019-01-01},
journal = {Zoology in the Middle East},
volume = {65},
number = {171},
pages = {280-282},
publisher = {Taylor & Francis},
keywords = {Arabian Gulf, Arabian Sea, Iran, killer whale, Orcinus orca, Persian Gulf},
pubstate = {published},
tppubtype = {article}
}
Soultan, Alaaeldin,Wikelski, Martin,Safi, Kamran
Risk of biodiversity collapse under climate change in the Afro-Arabian region Journal Article
In: Scientific Reports, vol. 9, no. 236, pp. 955, 2019, ISBN: 2045-2322.
Abstract | Links | BibTeX | Tags: Arabia, Arabian Gulf, Arabian Sea, biodiversity, Climate change, conservation status, extinction, IUCN Red List, Threat assessment
@article{,
title = {Risk of biodiversity collapse under climate change in the Afro-Arabian region},
author = {Soultan, Alaaeldin,Wikelski, Martin,Safi, Kamran},
url = {https://doi.org/10.1038/s41598-018-37851-6},
issn = {2045-2322},
year = {2019},
date = {2019-01-01},
journal = {Scientific Reports},
volume = {9},
number = {236},
pages = {955},
abstract = {For 107 endemic mammal species in the Afro-Arabian region, Sahara-Sahel and Arabian Desert, we used ensemble species distribution models to: (1) identify the hotspot areas for conservation, (2) assess the potential impact of the projected climate change on the distribution of the focal species, and (3) assign IUCN threat categories for the focal species according to the predicted changes in their potential distribution range. We identified two main hotspot areas for endemic mammals: the Sinai and its surrounding coastal area in the East, and the Mediterranean Coast around Morocco in the West. Alarmingly, our results indicate that about 17% of the endemic mammals in the Afro-Arabian region under the current climate change scenarios could go extinct before 2050. Overall, a substantial number of the endemic species will change from the IUCN threat category “Least Concern” to “Critically Endangered” or “Extinct” in the coming decades. Accordingly, we call for implementing an urgent proactive conservation action for these endemic species, particularly those that face a high risk of extinction in the next few years. The results of our study provide conservation managers and practitioners with the required information for implementing an effective conservation plan to protect the biodiversity of the Afro-Arabian region.},
keywords = {Arabia, Arabian Gulf, Arabian Sea, biodiversity, Climate change, conservation status, extinction, IUCN Red List, Threat assessment},
pubstate = {published},
tppubtype = {article}
}
Sutaria, D.
A Report On Baleen Whale Records And Recent Developments In Marine Mammal Research And Conservation Policy - Update From India Technical Report
no. 240, 2019, ISSN: SC/67A/CMP/03_Rev.
Abstract | Links | BibTeX | Tags: acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding
@techreport{,
title = {A Report On Baleen Whale Records And Recent Developments In Marine Mammal Research And Conservation Policy - Update From India},
author = {Sutaria, D.},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2017/05/sc_67a_cmp_03_rev1_baleen-whale-records-from-india-1.pdf},
issn = { SC/67A/CMP/03_Rev},
year = {2019},
date = {2019-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {240},
pages = {6},
abstract = {Twelve baleen whale reports were collected from June 2018 to May 2019. Of these seven were of live sightings reported by participatory fisher and diver networks along the coast, including two Bryde’s whale groups, and two separate humpback whale sightings of one individual each. The rest were unidentified baleen whale sightings. These reports are summarised here. Five ‘hotspot areas’ of the west coast, were identified, where information was gathered by interviewing fishers and inviting them to be part of a growing participatory reporting network. . We plan to continue this work in 2019-20 with passive acoustic monitoring using SoundTraps in two of the five hotspots. At the National level the Ministry of Environment, Forests and Climate Change, New Delhi has developed a National Arabian Sea Humpback whale Research and Recovery program. National and State-level programs are being developed, with support from the author and a wider research network in India. We recommend dedicated baleen whale surveys and collaborative efforts with local teams, to carry out long term research and conservation, including a net disentanglement workshop. },
keywords = {acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding},
pubstate = {published},
tppubtype = {techreport}
}
Willson, A.,Minton, A. Gianna.,Collins, T. ,Al Harthi, S.,Sarrouf Willson, M.,Cerchio, S,Braulik, G.,Baldwin, R.
Oman Research Update; documenting cetacean diversity and blue whale feeding habitat in Dhofar, southern Oman Technical Report
no. 505, 2019.
Abstract | Links | BibTeX | Tags: acoustic, Arabian Sea, balaenoptera musculus, Blue whale, Distribution, Humpback Whale, megaptera novaeangliae, Oman, photo identification
@techreport{,
title = {Oman Research Update; documenting cetacean diversity and blue whale feeding habitat in Dhofar, southern Oman},
author = {Willson, A.,Minton, A. Gianna.,Collins, T. ,Al Harthi, S.,Sarrouf Willson, M.,Cerchio, S,Braulik, G.,Baldwin, R.},
url = {https://arabianseawhalenetworkdotorg.files.wordpress.com/2019/06/sc_68a_cmp_08_oman-research-update.pdf},
year = {2019},
date = {2019-01-01},
urldate = {2019-01-01},
journal = {Paper presented to the 2019 meeting of the Scientific Committee of the International Whaling Commission},
number = {505},
pages = {14},
publisher = {IWC},
abstract = {Cetacean research has been conducted in Dhofar, southern Oman, since 2000 During this time efforts have been
primarily focused on documenting the distribution, abundance, and ecology of an Endangered population of
Arabian Sea humpback whales (ASHWs). The research has revealed the Hallaniyats Bay (including our study
site measuring approximately 10,000km2
) to be a habitat of importance for reproductive and foraging related
behaviours. Simultaneously the field surveys have revealed high cetacean diversity in the area, with over 18
species documented at the site, out of a total of 22 species known for the Arabian peninsula between 2003 and
2016. Short opportunistic surveys conducted March 2018 to April 2019 continue to provide evidence of the
ecological importance of the area for a diverse array of species, including several species of large baleen whales
(including humpback whales, Bryde’s whales, and blue whales) as well as a range of large, medium and small
odontocetes. Most recently, in April 2019, blue whales were observed over a three-day period, engaged in
behaviour associated with feeding. As well as documenting this important ecological event the team was able to
collect photographic, tissue and faecal samples that are expected to help resolve issues related to taxonomy and
population structure of blue whales in the northern Indian Ocean. The high levels of cetacean diversity and the
regular occurrence of species of scientific and conservation interest documented within a recent Important
Marine Mammal Area workshop suggest that the area warrants conservation management attention to maintain
its current ‘near-wilderness’ state. },
keywords = {acoustic, Arabian Sea, balaenoptera musculus, Blue whale, Distribution, Humpback Whale, megaptera novaeangliae, Oman, photo identification},
pubstate = {published},
tppubtype = {techreport}
}
primarily focused on documenting the distribution, abundance, and ecology of an Endangered population of
Arabian Sea humpback whales (ASHWs). The research has revealed the Hallaniyats Bay (including our study
site measuring approximately 10,000km2
) to be a habitat of importance for reproductive and foraging related
behaviours. Simultaneously the field surveys have revealed high cetacean diversity in the area, with over 18
species documented at the site, out of a total of 22 species known for the Arabian peninsula between 2003 and
2016. Short opportunistic surveys conducted March 2018 to April 2019 continue to provide evidence of the
ecological importance of the area for a diverse array of species, including several species of large baleen whales
(including humpback whales, Bryde’s whales, and blue whales) as well as a range of large, medium and small
odontocetes. Most recently, in April 2019, blue whales were observed over a three-day period, engaged in
behaviour associated with feeding. As well as documenting this important ecological event the team was able to
collect photographic, tissue and faecal samples that are expected to help resolve issues related to taxonomy and
population structure of blue whales in the northern Indian Ocean. The high levels of cetacean diversity and the
regular occurrence of species of scientific and conservation interest documented within a recent Important
Marine Mammal Area workshop suggest that the area warrants conservation management attention to maintain
its current ‘near-wilderness’ state.
Bopardikar, Isha,Sutaria, Dipani,Sule, Mihir,Jog, Ketki,Patankar, Vardhan,Klinck, Holger
Description and classification of Indian Ocean humpback dolphin (Sousa plumbea) whistles recorded off the Sindhudurg coast of Maharashtra, India Journal Article
In: Marine Mammal Science, vol. 34, no. 3, pp. 755-776, 2018, ISSN: 1748-7692.
Abstract | Links | BibTeX | Tags: Arabian Sea, humpback dolphin, India, passive acoustic monitoring, sousa, Sousa plumbea, vocalization, Whistle, whistles
@article{,
title = {Description and classification of Indian Ocean humpback dolphin (Sousa plumbea) whistles recorded off the Sindhudurg coast of Maharashtra, India},
author = {Bopardikar, Isha,Sutaria, Dipani,Sule, Mihir,Jog, Ketki,Patankar, Vardhan,Klinck, Holger},
url = {http://dx.doi.org/10.1111/mms.12479},
issn = {1748-7692},
year = {2018},
date = {2018-01-01},
journal = {Marine Mammal Science},
volume = {34},
number = {3},
pages = {755-776},
abstract = {The Indian Ocean humpback dolphin (Sousa plumbea), a common cetacean species in India, has a diverse vocal repertoire, which to date has not been described in detail. This study focused on analyzing their whistle vocalizations. Humpback dolphins were recorded off the Sindhudurg coast of Maharashtra, India, and 2,260 whistles were analyzed for their acoustic characteristics. Whistles spanned a wide frequency range between 2.3 kHz and 33.0 kHz, with durations ranging from 0.01 s to 1.60 s. Whistles were categorized into seven contour classes based on their qualitative properties. A classification and regression tree (CART) analysis was used to quantify variability between the seven contour classes using the measured acoustic features. Based on the CART analysis, frequency gradient, minimum slope, maximum slope, beginning and ending slope accounted for most variability between whistle types. CART resulted in an overall classification accuracy of 89.5%. This study provides a detailed description of acoustic features and qualitative properties of humpback dolphin whistles from the northwestern coast of India. Further comparisons of acoustic data from Sousa populations along the Indian coast are necessary to determine possible geographic variations in whistle characteristics and whether the variations are driven by environmental or genetic factors or a combination of both.},
keywords = {Arabian Sea, humpback dolphin, India, passive acoustic monitoring, sousa, Sousa plumbea, vocalization, Whistle, whistles},
pubstate = {published},
tppubtype = {article}
}
de Vos,Asha,Faux,Cassandra E.,Marthick,James,Dickinson,Joanne,Jarman,Simon N.
New Determination of Prey and Parasite Species for Northern Indian Ocean Blue Whales Journal Article
In: Frontiers in Marine Science, vol. 5, no. 84, 2018, ISBN: 2296-7745.
Abstract | Links | BibTeX | Tags: Acanthocephala, Arabian Sea, balaenoptera musculus, behaviour, blue whales, DNA metabarcoding,Sri Lanka,Blue whales,feeding,Northern Indian Ocean,faeces,Sergestid,Euphausiidae,Acanthocephala,shrimp,krill,behaviour, euphasids, Faeces, fecal analysis, feeding, Krill, Northern Indian Ocean, parasites, prey, Sergestid shrimp, shrimp, Sri Lanka
@article{,
title = {New Determination of Prey and Parasite Species for Northern Indian Ocean Blue Whales},
author = {de Vos,Asha,Faux,Cassandra E.,Marthick,James,Dickinson,Joanne,Jarman,Simon N.},
url = {https://www.frontiersin.org/article/10.3389/fmars.2018.00104},
issn = {2296-7745},
year = {2018},
date = {2018-01-01},
journal = {Frontiers in Marine Science},
volume = {5},
number = {84},
abstract = {Blue whales are little studied, face significant anthropogenic threats and within the Northern Indian Ocean, have a restricted range, making them an archetype for conservation needs of megafauna around the world. We studied feeding behaviour of blue whales using dietary DNA metabarcoding of faecal samples. While globally blue whale populations feed predominantly on Euphausiidae, 87 % of prey DNA amplicons extracted from faecal samples from this population were sergestid shrimp, demonstrating that blue whales can locate and feed on dense swarms of other types of prey when they occur. Within the Indian Ocean sergestids are present within the top 300 m, which correlates with the deep scattering layer observed by hydroacoustics. Studies suggest that this requirement to dive deeper in search of prey likely explains the prevalence of fluke up diving within this population of blue whales relative to other parts of the globe. Furthermore, this study revealed the presence of acanthocephalan endoparasites within the stomach and intestines of the Northern Indian Ocean blue whales. This represents the first record of Acanthocephala in blue whales in the Northern Indian Ocean and highlights the need for further studies on both the ecto- and endoparasitic flora and monitoring of health of these cetaceans for their management and conservation.},
keywords = {Acanthocephala, Arabian Sea, balaenoptera musculus, behaviour, blue whales, DNA metabarcoding,Sri Lanka,Blue whales,feeding,Northern Indian Ocean,faeces,Sergestid,Euphausiidae,Acanthocephala,shrimp,krill,behaviour, euphasids, Faeces, fecal analysis, feeding, Krill, Northern Indian Ocean, parasites, prey, Sergestid shrimp, shrimp, Sri Lanka},
pubstate = {published},
tppubtype = {article}
}
IWC
Report of the Scientific Committee: Annex O: Cetacean Stocks that Are or Might be Subject of Conservation Management Plans (CMPs) Technical Report
no. 123, 2018.
Links | BibTeX | Tags: Arabian Sea, conservation, IWC
@techreport{,
title = {Report of the Scientific Committee: Annex O: Cetacean Stocks that Are or Might be Subject of Conservation Management Plans (CMPs)},
author = {IWC},
url = {https://archive.iwc.int/pages/download.php?ref=13044&ext=pdf&alternative=5232&noattach=true},
year = {2018},
date = {2018-01-01},
urldate = {2018-01-01},
number = {123},
pages = {20},
publisher = {International Whaling Commission},
keywords = {Arabian Sea, conservation, IWC},
pubstate = {published},
tppubtype = {techreport}
}
Madhusudhana, Shyam Kumar,Chakraborty, Bishwajit,Latha, G.
Humpback whale singing activity off the Goan coast in the Eastern Arabian Sea Journal Article
In: Bioacoustics, no. 147, pp. 1-16, 2018, ISBN: 0952-4622.
Abstract | Links | BibTeX | Tags: Arabian Sea, breeding, Goa, Humpback Whale, India, Megaptera novaeanglia, PAM, passive acoustic monitoring, song, vocal behaviour
@article{,
title = {Humpback whale singing activity off the Goan coast in the Eastern Arabian Sea},
author = {Madhusudhana, Shyam Kumar,Chakraborty, Bishwajit,Latha, G.},
url = {https://doi.org/10.1080/09524622.2018.1458248},
issn = {0952-4622},
year = {2018},
date = {2018-01-01},
journal = {Bioacoustics},
number = {147},
pages = {1-16},
publisher = {Taylor & Francis},
abstract = {AbstractFor over two decades, passive acoustic monitoring (PAM) methods have been successfully employed around the world for studying aquatic megafauna. PAM-driven studies in Indian waters have so far been relatively very scarce. Furthermore, cetacean populations inhabiting the north western Indian Ocean are far less studied than those in many other regions around the world. This work likely constitutes the first systematic study of the vocal repertoire of humpback whales (Megaptera novaeangliae) at a near-shore site along the western coast of India. Analysis of the observed vocalizations provides an insight into the behaviour of the species. This is significant as it assists in developing a better understanding of the habitat use of the non-migratory Arabian Sea humpback whale population. In contrast, other breeding populations such as those around the North Atlantic, South Pacific and Australia have been relatively well studied. Underwater passive acoustic data were collected during March 2017 using an autonomous logger at a shallow-water site off the eastern edge of Grande Island off the coast of Goa. Humpback whale vocalizations were found to occur over multiple days in the recordings. Time?frequency contours of individual units of vocalization were extracted with the aid of an automatic detection technique and the characteristics of the units were measured. Further, successive units were analysed for formation of phrases and themes. Reconstruction of putative songs from the identified units and themes was not possible due to the limitations imposed by the nature of data collection. Detailed analyses of units, phrases and themes are presented.},
keywords = {Arabian Sea, breeding, Goa, Humpback Whale, India, Megaptera novaeanglia, PAM, passive acoustic monitoring, song, vocal behaviour},
pubstate = {published},
tppubtype = {article}
}
Sutaria, D.
Baleen whale reports from the eastern Arabian Sea based on interview surveys and stranding reports - update from India Technical Report
no. 483, 2018, ISSN: SC/67B/CMP/15.
Abstract | Links | BibTeX | Tags: acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding
@techreport{,
title = {Baleen whale reports from the eastern Arabian Sea based on interview surveys and stranding reports - update from India},
author = {Sutaria, D.},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2018/05/sc_67b_cmp_15_baleen-whale-records-from-india-1.pdf},
issn = { SC/67B/CMP/15},
year = {2018},
date = {2018-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {483},
pages = {16},
abstract = {In 2017-18, seven unidentified baleen whales, two Bryde’s whales (Balaenoptera edeni) and two
humpback whales (Megaptera novaeangliae) have been reported from the west coast of India (eastern
Arabian Sea). The stranding and sighting reports are summarised here. Fishers were interviewed from
south Gujarat to west Tamil Nadu, for baleen whale sighting events to identify hotspots, and to collect
community perceptions towards baleen whales. Based on these interviews, along with data on
strandings, opportunistic song recordings, and the recent presence of a satellite tagged whale from
Oman, seven regions have been identified as hotspots and habitats used by humpback whales.
Humpback whales in these areas seem to be common during the months of January to March. We
continue our work in 2018-20 with systematic vessel based surveys using dipping hydrophones in four
of the seven hotspots. We recommend dedicated baleen whale surveys and collaborative efforts with
local and international teams, to carry out in-depth analyses of stranding events, and for a larger
coverage in visual surveys with the future use of static passive acoustic monitoring systems.},
keywords = {acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding},
pubstate = {published},
tppubtype = {techreport}
}
humpback whales (Megaptera novaeangliae) have been reported from the west coast of India (eastern
Arabian Sea). The stranding and sighting reports are summarised here. Fishers were interviewed from
south Gujarat to west Tamil Nadu, for baleen whale sighting events to identify hotspots, and to collect
community perceptions towards baleen whales. Based on these interviews, along with data on
strandings, opportunistic song recordings, and the recent presence of a satellite tagged whale from
Oman, seven regions have been identified as hotspots and habitats used by humpback whales.
Humpback whales in these areas seem to be common during the months of January to March. We
continue our work in 2018-20 with systematic vessel based surveys using dipping hydrophones in four
of the seven hotspots. We recommend dedicated baleen whale surveys and collaborative efforts with
local and international teams, to carry out in-depth analyses of stranding events, and for a larger
coverage in visual surveys with the future use of static passive acoustic monitoring systems.
Wabnitz, Colette C. C.,Lam, Vicky W. Y.,Reygondeau, Gabriel,Teh, Lydia C. L.,Al-Abdulrazzak, Dalal,Khalfallah, Myriam,Pauly, Daniel,Palomares, Maria L. Deng,Zeller, Dirk,Cheung, William W. L.
Climate change impacts on marine biodiversity, fisheries and society in the Arabian Gulf Journal Article
In: PLOS ONE, vol. 13, no. 494, pp. e0194537, 2018.
Abstract | Links | BibTeX | Tags: Arabia, Arabian Gulf, Arabian Sea, biodiversity, Climate change, diversity, economic impact, Fisheries, Persian Gulf, Sea of Oman
@article{,
title = {Climate change impacts on marine biodiversity, fisheries and society in the Arabian Gulf},
author = {Wabnitz, Colette C. C.,Lam, Vicky W. Y.,Reygondeau, Gabriel,Teh, Lydia C. L.,Al-Abdulrazzak, Dalal,Khalfallah, Myriam,Pauly, Daniel,Palomares, Maria L. Deng,Zeller, Dirk,Cheung, William W. L.},
url = {https://doi.org/10.1371/journal.pone.0194537},
year = {2018},
date = {2018-01-01},
journal = {PLOS ONE},
volume = {13},
number = {494},
pages = {e0194537},
publisher = {Public Library of Science},
abstract = {Climate change–reflected in significant environmental changes such as warming, sea level rise, shifts in salinity, oxygen and other ocean conditions–is expected to impact marine organisms and associated fisheries. This study provides an assessment of the potential impacts on, and the vulnerability of, marine biodiversity and fisheries catches in the Arabian Gulf under climate change. To this end, using three separate niche modelling approaches under a ‘business-as-usual’ climate change scenario, we projected the future habitat suitability of the Arabian Gulf (also known as the Persian Gulf) for 55 expert-identified priority species, including charismatic and non-fish species. Second, we conducted a vulnerability assessment of national economies to climate change impacts on fisheries. The modelling outputs suggested a high rate of local extinction (up to 35% of initial species richness) by 2090 relative to 2010. Spatially, projected local extinctions are highest in the southwestern part of the Gulf, off the coast of Saudi Arabia, Qatar and the United Arab Emirates (UAE). While the projected patterns provided useful indicators of potential climate change impacts on the region’s diversity, the magnitude of changes in habitat suitability are more uncertain. Fisheries-specific results suggested reduced future catch potential for several countries on the western side of the Gulf, with projections differing only slightly among models. Qatar and the UAE were particularly affected, with more than a 26% drop in future fish catch potential. Integrating changes in catch potential with socio-economic indicators suggested the fisheries of Bahrain and Iran may be most vulnerable to climate change. We discuss limitations of the indicators and the methods used, as well as the implications of our overall findings for conservation and fisheries management policies in the region.},
keywords = {Arabia, Arabian Gulf, Arabian Sea, biodiversity, Climate change, diversity, economic impact, Fisheries, Persian Gulf, Sea of Oman},
pubstate = {published},
tppubtype = {article}
}
Baldwin, R.,Willson, A.,Al Baluchi, A.,Al Jabri, A.
Planning for responsible humpback whale watching in Oman Technical Report
no. 311, 2017, ISBN: SC/67A/WW/03.
Abstract | BibTeX | Tags: Arabian Gulf, Arabian Sea, disturbance, Humpback Whale, megaptera novaeangliae, Threat assessment, tourism, Whale watching
@techreport{,
title = {Planning for responsible humpback whale watching in Oman},
author = {Baldwin, R.,Willson, A.,Al Baluchi, A.,Al Jabri, A.},
issn = { SC/67A/WW/03},
year = {2017},
date = {2017-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {311},
pages = {17},
abstract = {The emerging whale watching industry in Oman includes one small-scale tour operator targeting
Endangered Arabian Sea humpback whales, as well as other operators that opportunistically encounter this
species. Guidelines for whale watching in Oman were developed in 2013/14 as part of an IWC-supported
project that also included awareness-raising and initial training of tour operators and vessel captains in key
locations. This formed the basis of the current study which aims to identify requirements to minimise the
potentially negative impacts of whale watching on Arabian Sea humpback whales specifically, whilst also
highlighting some key business approaches for achieving responsibly-managed whale watching in Oman.
The whale watching industry in Oman has potential for growth and should be appropriately guided in
advance of expansion. A road map of actions towards this goal is outlined, aimed at government and
private sector stakeholders. Recommendations are also made for monitoring and controlling whale
watching activities pending further research. Further training of operators (especially vessel captains) is
still required to ensure responsible boat handling around whales and improved planning towards a more
sustainable industry. The use of whale watching vessel as a platform for collection of scientific data has
been initiated at one location. Draft regulations to help govern the industry in Oman have been prepared
and are under review by Oman’s Ministry of Environment and Climate Affairs. Although focused on
humpback whales, the study also recommends that results are applied to other species and identifies
priorities for data collection to fill existing knowledge gaps.},
keywords = {Arabian Gulf, Arabian Sea, disturbance, Humpback Whale, megaptera novaeangliae, Threat assessment, tourism, Whale watching},
pubstate = {published},
tppubtype = {techreport}
}
Endangered Arabian Sea humpback whales, as well as other operators that opportunistically encounter this
species. Guidelines for whale watching in Oman were developed in 2013/14 as part of an IWC-supported
project that also included awareness-raising and initial training of tour operators and vessel captains in key
locations. This formed the basis of the current study which aims to identify requirements to minimise the
potentially negative impacts of whale watching on Arabian Sea humpback whales specifically, whilst also
highlighting some key business approaches for achieving responsibly-managed whale watching in Oman.
The whale watching industry in Oman has potential for growth and should be appropriately guided in
advance of expansion. A road map of actions towards this goal is outlined, aimed at government and
private sector stakeholders. Recommendations are also made for monitoring and controlling whale
watching activities pending further research. Further training of operators (especially vessel captains) is
still required to ensure responsible boat handling around whales and improved planning towards a more
sustainable industry. The use of whale watching vessel as a platform for collection of scientific data has
been initiated at one location. Draft regulations to help govern the industry in Oman have been prepared
and are under review by Oman’s Ministry of Environment and Climate Affairs. Although focused on
humpback whales, the study also recommends that results are applied to other species and identifies
priorities for data collection to fill existing knowledge gaps.
Braulik, G.,Findlay, K,Cerchio, S,Baldwin, R,Perrin, W.
Sousa plumbea Book
e.T82031633A82031644. Downloaded on 10 December 2017., 2017.
Abstract | BibTeX | Tags: Arabian Sea, Bycatch, conservation status, humpback dolphin, Indian Ocean, Indo-Pacific humpback dolphin, Sousa plumbea, Threat assessment
@book{,
title = {Sousa plumbea},
author = {Braulik, G.,Findlay, K,Cerchio, S,Baldwin, R,Perrin, W.},
year = {2017},
date = {2017-01-01},
journal = {The IUCN Red List of Threatened Species},
number = {49},
publisher = {e.T82031633A82031644. Downloaded on 10 December 2017.},
abstract = {Endangered: Justification:
In the places where studies have occurred, Indian Ocean Humpback Dolphin subpopulations were found to be small: always fewer than 500 and generally fewer than 100 individuals in discrete, or semi-isolated areas. Humpback dolphins have one of the most specific habitat preferences and restricted distributions of any marine megafauna, and both of these characteristics are well known to reduce the resilience of species to environmental change and anthropogenic threats and to increase their extinction risk (Davidson et al. 2011, Dulvy et al. 2014, Purvis et al. 2000). Indian Ocean Humpback Dolphins are concentrated in coastal waters within 2 km of shore and they are often sighted only a few hundred meters from land. This distribution places them in exactly the same location as the majority of small-scale fishing effort prevalent throughout their range in the same nearshore habitat. As a result, humpback dolphins encounter large numbers of coastal gillnets and are at high risk of entanglement. High and clearly unsustainable mortality rates have been reported from several areas and frequent encounters with fishing gear can be inferred from the high degree of scarring and injury—for example, 41% of individuals in Pemba, Tanzania bore gear-related scars (Braulik unpub. data). Although information on population size, threats and mortality is available only for portions of the species range, there are strong reasons to suspect and infer that the threats will be similar or possibly even more intense elsewhere.
The deaths of only 4.2 individuals per year from a population of 100 would result in a 50% decline (Moore 2015). The available evidence on the studied subpopulations in South Africa and all indications from elsewhere in the range suggest that mortality rates are consistently at or above the rate that would result in a 50% decline in 75 years (three generations). The species’ preferred habitat and small populations overlap in both space and time with several ubiquitous and pervasive threats that are increasing in severity, leaving no refuges for these dolphins. The threats are serious enough in a large enough proportion of the total species range that a range-wide decline of at least 50% over three generations spanning both the past and the future (about 75 years, from 1960 (the start of intensive mono-filament gillnetting in this region) to 2035) is suspected and inferred and the causes of the decline (bycatch and hunting [both considered here to constitute ‘exploitation’], decline in habitat quality and possibly pollution) have not ceased. Therefore, the Indian Ocean Humpback Dolphin qualifies for Endangered A4cd.
The factor primarily responsible for the decline is incidental mortality in small-scale coastal fisheries, but the loss, degradation and pollution of habitat in numerous coastal areas is a contributing and increasing factor. The threats have not been mitigated anywhere in the species’ range, even though threat levels are increasing virtually everywhere. All evidence suggests that threats and declines will continue and are likely to increase in the future and worldwide there are almost no examples where cetacean bycatch in small-scale artisanal fisheries has been successfully addressed. Alternative methods for small-scale fisheries to replace gillnets are not generally available. Therefore, the species also qualifies for Endangered 3cd as a decline of over 50% can be projected to occur over the next three generations (75 years from 2016 to 2091). It also qualifies for Endangered A2cd as a decline of over 50% is suspected over the last 75 years beginning with the expansion of the use of gillnets in global marine fisheries from around the end of the Second World War up to the present day.},
keywords = {Arabian Sea, Bycatch, conservation status, humpback dolphin, Indian Ocean, Indo-Pacific humpback dolphin, Sousa plumbea, Threat assessment},
pubstate = {published},
tppubtype = {book}
}
In the places where studies have occurred, Indian Ocean Humpback Dolphin subpopulations were found to be small: always fewer than 500 and generally fewer than 100 individuals in discrete, or semi-isolated areas. Humpback dolphins have one of the most specific habitat preferences and restricted distributions of any marine megafauna, and both of these characteristics are well known to reduce the resilience of species to environmental change and anthropogenic threats and to increase their extinction risk (Davidson et al. 2011, Dulvy et al. 2014, Purvis et al. 2000). Indian Ocean Humpback Dolphins are concentrated in coastal waters within 2 km of shore and they are often sighted only a few hundred meters from land. This distribution places them in exactly the same location as the majority of small-scale fishing effort prevalent throughout their range in the same nearshore habitat. As a result, humpback dolphins encounter large numbers of coastal gillnets and are at high risk of entanglement. High and clearly unsustainable mortality rates have been reported from several areas and frequent encounters with fishing gear can be inferred from the high degree of scarring and injury—for example, 41% of individuals in Pemba, Tanzania bore gear-related scars (Braulik unpub. data). Although information on population size, threats and mortality is available only for portions of the species range, there are strong reasons to suspect and infer that the threats will be similar or possibly even more intense elsewhere.
The deaths of only 4.2 individuals per year from a population of 100 would result in a 50% decline (Moore 2015). The available evidence on the studied subpopulations in South Africa and all indications from elsewhere in the range suggest that mortality rates are consistently at or above the rate that would result in a 50% decline in 75 years (three generations). The species’ preferred habitat and small populations overlap in both space and time with several ubiquitous and pervasive threats that are increasing in severity, leaving no refuges for these dolphins. The threats are serious enough in a large enough proportion of the total species range that a range-wide decline of at least 50% over three generations spanning both the past and the future (about 75 years, from 1960 (the start of intensive mono-filament gillnetting in this region) to 2035) is suspected and inferred and the causes of the decline (bycatch and hunting [both considered here to constitute ‘exploitation’], decline in habitat quality and possibly pollution) have not ceased. Therefore, the Indian Ocean Humpback Dolphin qualifies for Endangered A4cd.
The factor primarily responsible for the decline is incidental mortality in small-scale coastal fisheries, but the loss, degradation and pollution of habitat in numerous coastal areas is a contributing and increasing factor. The threats have not been mitigated anywhere in the species’ range, even though threat levels are increasing virtually everywhere. All evidence suggests that threats and declines will continue and are likely to increase in the future and worldwide there are almost no examples where cetacean bycatch in small-scale artisanal fisheries has been successfully addressed. Alternative methods for small-scale fisheries to replace gillnets are not generally available. Therefore, the species also qualifies for Endangered 3cd as a decline of over 50% can be projected to occur over the next three generations (75 years from 2016 to 2091). It also qualifies for Endangered A2cd as a decline of over 50% is suspected over the last 75 years beginning with the expansion of the use of gillnets in global marine fisheries from around the end of the Second World War up to the present day.
Dakhteh, Seyed M. H.,Ranjbar, Sharif,Moazeni, Mostafa,Mohsenian, Nazanin,Delshab, Hossein,Moshiri, Hamed,Nabavi, Seyed M. B.,Van Waerebeek, Koen
The Persian Gulf is part of the habitual range of the Arabian Sea Humpback whale population Journal Article
In: Journal of Marine Biology & Oceanography, vol. 6, no. 77, pp. 1-6, 2017.
Abstract | BibTeX | Tags: Arabian Gulf, Arabian Sea, Distribution, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike
@article{,
title = {The Persian Gulf is part of the habitual range of the Arabian Sea Humpback whale population},
author = {Dakhteh, Seyed M. H.,Ranjbar, Sharif,Moazeni, Mostafa,Mohsenian, Nazanin,Delshab, Hossein,Moshiri, Hamed,Nabavi, Seyed M. B.,Van Waerebeek, Koen},
year = {2017},
date = {2017-01-01},
journal = {Journal of Marine Biology & Oceanography},
volume = {6},
number = {77},
pages = {1-6},
abstract = {The humpback whale has long been considered a rare straggler into the Persian Gulf, however new evidence contradicts this concept. We here critically review published and new records for Megaptera novaeangliae occurrence in the Gulf for the period 1883-2017. Of eight authenticated records (6 specimens, 2 live-sightings), seven are contemporary cases while one is a mid-Holocene specimen from UAE. An additional four are possible but unsubstantiated reports. Four regional, current, range states are confirmed, i.e. Iran, Iraq, Kuwait and Qatar. Four of the five newly reported cases are from Iran's coastal waters. We conclude that the Persian Gulf is part of the habitual range of the Arabian Sea humpback whale population, and has been since at least the mid-Holocene. It is unknown whether frequent passage occurs through the Strait of Hormuz or whether whales are (semi)resident. The low abundance of this endangered population and frequent deleterious anthropogenic events, particularly ship strikes and net entanglements, are cause for major concern. In view of its historical and taxonomic relevance, the formal description of Megaptera indica Gervais, 1883, from Iraq, now thought to be a subspecies M. novaeangliae indica, is here translated from French.%U http://www.biorxiv.org/content/biorxiv/early/2017/09/06/185033.full.pdf},
keywords = {Arabian Gulf, Arabian Sea, Distribution, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike},
pubstate = {published},
tppubtype = {article}
}
Dakteh, S.M.H.,Ranjbar, S.,Moazeni, M.,Mohsenian, Nazanin,Delshab, H.,Moshiri, H.,Van Waerebeek, K
On the presence of humpback whales in the Persian Gulf: rare or rarely documented? Technical Report
no. 78, 2017, ISBN: SC/67A/CMP/14.
Abstract | BibTeX | Tags: Arabian Gulf, Arabian Sea, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, stranding
@techreport{,
title = {On the presence of humpback whales in the Persian Gulf: rare or rarely documented?},
author = {Dakteh, S.M.H.,Ranjbar, S.,Moazeni, M.,Mohsenian, Nazanin,Delshab, H.,Moshiri, H.,Van Waerebeek, K},
issn = { SC/67A/CMP/14},
year = {2017},
date = {2017-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {78},
pages = {7},
abstract = {We critically review the evidence for humpback whale presence in the Persian Gulf. Five specimen records, assumed to belong to the
endangered Arabian Sea population, are confirmed in the period 1883- 2017: Bassore Bay, Iraq; Doha, Qatar; Kuwait Inner harbour,
Kuwait; Qeshm Island, Iran; and Akhtar, Bushehr Province, Iran. The two Iranian cases, both juveniles, are newly recorded. With
accumulating reports, an alternate hypothesis to 'rare stragglers' deserves consideration, one in which Arabian Sea humpback whales
may enter the Persian Gulf with some regularity, perhaps as normal visitors, if not permanent residents. Deficiency of records may
reflect a general sparsity of whale research effort in the Persian Gulf. The historical description of Megaptera indica Gervais, 1883 is
translated from French.},
keywords = {Arabian Gulf, Arabian Sea, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, stranding},
pubstate = {published},
tppubtype = {techreport}
}
endangered Arabian Sea population, are confirmed in the period 1883- 2017: Bassore Bay, Iraq; Doha, Qatar; Kuwait Inner harbour,
Kuwait; Qeshm Island, Iran; and Akhtar, Bushehr Province, Iran. The two Iranian cases, both juveniles, are newly recorded. With
accumulating reports, an alternate hypothesis to 'rare stragglers' deserves consideration, one in which Arabian Sea humpback whales
may enter the Persian Gulf with some regularity, perhaps as normal visitors, if not permanent residents. Deficiency of records may
reflect a general sparsity of whale research effort in the Persian Gulf. The historical description of Megaptera indica Gervais, 1883 is
translated from French.
de Vos, Asha
First record of Omura’s whale, Balaenoptera omurai, in Sri Lankan waters Journal Article
In: Marine Biodiversity Records, vol. 10, no. 82, pp. 18, 2017, ISBN: 1755-2672.
Abstract | Links | BibTeX | Tags: Arabian Sea, balaenoptera omurai, Distribution, Northern Indian Ocean, Omura's Whale, Sri Lanka
@article{,
title = {First record of Omura’s whale, Balaenoptera omurai, in Sri Lankan waters},
author = {de Vos, Asha},
url = {http://dx.doi.org/10.1186/s41200-017-0121-2},
issn = {1755-2672},
year = {2017},
date = {2017-01-01},
journal = {Marine Biodiversity Records},
volume = {10},
number = {82},
pages = {18},
abstract = {An unusually coloured, small baleen whale was documented off the southern coast of Sri Lanka in February 2017 during routine field surveys. Based on five distinct morphological characteristics including jaw asymmetry, presence of a prominent central rostral ridge, blaze on right side, asymmetrical chevron on left and right sides and a strongly falcate dorsal fin the individual was positively identified as an Omura’s whale (Balaenoptera omurai). This discovery represents the first confirmed sighting of Omura’s whale in Sri Lankan and therefore central Northern Indian Ocean waters.},
keywords = {Arabian Sea, balaenoptera omurai, Distribution, Northern Indian Ocean, Omura's Whale, Sri Lanka},
pubstate = {published},
tppubtype = {article}
}
Gore, M. A.,Culloch, R,Gray, H.,Hoelzel, A. R.,Lockyer, C.,Kiani, M. S.,Waqas, U,Hussain, B,Rahim, Abdul,Shah, A.,Ormond, R. F.
Assessment of beach-cast cetaceans in Pakistan: implications for conservation and management Journal Article
In: Journal of Cetacean Research and Management, vol. 16, no. 104, pp. 1-7, 2017.
Abstract | BibTeX | Tags: aging, Arabian Sea, balaenoptera edeni, beach survey, Bryde’s whale, carcass analysis, genetics, Pakistan, stranding
@article{,
title = {Assessment of beach-cast cetaceans in Pakistan: implications for conservation and management},
author = {Gore, M. A.,Culloch, R,Gray, H.,Hoelzel, A. R.,Lockyer, C.,Kiani, M. S.,Waqas, U,Hussain, B,Rahim, Abdul,Shah, A.,Ormond, R. F.},
year = {2017},
date = {2017-01-01},
journal = {Journal of Cetacean Research and Management},
volume = {16},
number = {104},
pages = {1-7},
abstract = {Until recently, little was known about the distribution and species occurrence of marine cetaceans in Pakistani waters, an area which needed to be
addressed exigently given its inclusion in the Indian Ocean Whale Sanctuary. Boat-based surveys (2005–09) carried out along the coast of Pakistan
identified 12 species of cetaceans. Although these surveys can be very useful for providing information on species presence and distribution,
estimates of the age and sex of these groups can be more uncertain. Consequently, this present study undertook complementary beach-based surveys
over the same period across all accessible regions of the Pakistani coast and created a community reporting scheme for stranded and beach-cast
remains of cetaceans. Tissue samples and/or skeletal material were collected over three years from 37 individual specimens, with DNA successfully
extracted from 24. Using molecular techniques, a total of seven species were identified and there was an indication that the majority of the samples
were from males. An analysis of teeth collected from 12 beach-cast odontocetes showed an age range between neonatal and 17 years. The results
of this study corroborate the presence of species observed during the boat-based surveys and identified a further three species. The data also provide
additional information on age and sex. A comparison with similar studies suggests that the stranding rate is low in Pakistan. No mass strandings
occurred during the seven year monitoring period. The results indicate that beach-based surveys are effective for gathering data on species presence
in regions where resources are limited, the terrain is harsh and availability of data is low. Ultimately, the results of this work will help with assessing
the conservation status and management requirements of the region’s cetaceans, both locally and internationally with respect to the Indian Ocean
Whale Sanctuary. Species identified were 4 bottlenose
dolphins (Tursiops sp.), 6 long-beaked common dolphins, 1
spinner dolphin, 4 Indian Ocean humpback dolphins, 1 pantropical
spotted dolphin (Stenella attenuata) and 5 Bryde’s
whales},
keywords = {aging, Arabian Sea, balaenoptera edeni, beach survey, Bryde’s whale, carcass analysis, genetics, Pakistan, stranding},
pubstate = {published},
tppubtype = {article}
}
addressed exigently given its inclusion in the Indian Ocean Whale Sanctuary. Boat-based surveys (2005–09) carried out along the coast of Pakistan
identified 12 species of cetaceans. Although these surveys can be very useful for providing information on species presence and distribution,
estimates of the age and sex of these groups can be more uncertain. Consequently, this present study undertook complementary beach-based surveys
over the same period across all accessible regions of the Pakistani coast and created a community reporting scheme for stranded and beach-cast
remains of cetaceans. Tissue samples and/or skeletal material were collected over three years from 37 individual specimens, with DNA successfully
extracted from 24. Using molecular techniques, a total of seven species were identified and there was an indication that the majority of the samples
were from males. An analysis of teeth collected from 12 beach-cast odontocetes showed an age range between neonatal and 17 years. The results
of this study corroborate the presence of species observed during the boat-based surveys and identified a further three species. The data also provide
additional information on age and sex. A comparison with similar studies suggests that the stranding rate is low in Pakistan. No mass strandings
occurred during the seven year monitoring period. The results indicate that beach-based surveys are effective for gathering data on species presence
in regions where resources are limited, the terrain is harsh and availability of data is low. Ultimately, the results of this work will help with assessing
the conservation status and management requirements of the region’s cetaceans, both locally and internationally with respect to the Indian Ocean
Whale Sanctuary. Species identified were 4 bottlenose
dolphins (Tursiops sp.), 6 long-beaked common dolphins, 1
spinner dolphin, 4 Indian Ocean humpback dolphins, 1 pantropical
spotted dolphin (Stenella attenuata) and 5 Bryde’s
whales
Oman National Centre for Statistics; Information
Statistical Year Book Journal Article
In: vol. Issue 45, no. 390, pp. 447, 2017.
BibTeX | Tags: Arabian Sea, artisanal fisheries, commercial catch, dhow, Fisheries, Gill net, Oman, Sea of Oman
@article{,
title = {Statistical Year Book},
author = {Oman National Centre for Statistics and Information},
year = {2017},
date = {2017-01-01},
volume = {Issue 45},
number = {390},
pages = {447},
keywords = {Arabian Sea, artisanal fisheries, commercial catch, dhow, Fisheries, Gill net, Oman, Sea of Oman},
pubstate = {published},
tppubtype = {article}
}
Jefferson, T.,Smith, B.D.,Braulik, G.,Perrin, W.
Sousa chinensis Book
e.T82031633A82031644. Downloaded on 10 December 2017., 2017.
Abstract | BibTeX | Tags: Arabian Sea, Bycatch, conservation status, humpback dolphin, Indian Ocean, Indo-Pacific humpback dolphin, Sousa plumbea, Threat assessment
@book{,
title = {Sousa chinensis},
author = {Jefferson, T.,Smith, B.D.,Braulik, G.,Perrin, W.},
year = {2017},
date = {2017-01-01},
journal = {The IUCN Red List of Threatened Species},
number = {126},
publisher = {e.T82031633A82031644. Downloaded on 10 December 2017.},
abstract = {Vulnerable: Justification:
The only available population trend estimate for S. chinensis is an estimated 2.46% annual decline in the size of the subpopulation in HK/PRE (Huang et al. 2012), where there are a number of marine parks and reserves in place for dolphin protection, and where the Hong Kong authorities have put more effort into impact assessment and management than in any other part of the species’ range (see Jefferson et al. 2009). The situation elsewhere appears to be more dire, with fisheries bycatch being a nearly-universal threat. Population reductions of at least 3.7% per annum (see below for information that human-caused mortality rates of 3.7% would lead to a 30% decline in abundance over three generations) can therefore be inferred over most of the species’ range, due to known incidental mortality from intensive fishing effort using entangling gears, and ongoing habitat loss and degradation due to coastal development. Vessel collisions and environmental contamination appear to be factors as well, in at least some parts of the range. The above inference is supported in several areas by direct and/or indirect evidence, including documentation of bycatch, the intensive use of gillnets and other fishing gears known to entangle small cetaceans, interviews with fishermen who use entangling gears, and the abandonment of areas of previous occupancy (see Xu et al. 2015).
The Indo-Pacific Humpback Dolphin therefore qualifies for Vulnerable A3cd+4cd, based on an inferred population size reduction, where subcriterion c is interpreted as quality of habitat, and subcriterion d (actual or potential levels of exploitation) includes fisheries bycatch. We can infer a population reduction of greater than or equal to 30% over three generations (75 years), from approximately 1960 in the past to 2035 in the future. This takes into account that the main causes of the suspected/inferred decline in population size, bycatch and habitat destruction/degradation, have not ceased and are not well understood throughout most of the species’ range. Other than in Hong Kong (and to a lesser extent Taiwan), there have been virtually no conservation actions taken to address these threats, and available evidence suggests that they will continue and may even escalate in the future. The assessment of S. chinensis as Vulnerable based on criterion A3cd+4cd applies, regardless of whether or not the Bangladesh/eastern India animals are included, because it is based on population trends, rather than absolute numbers or a declining range.},
keywords = {Arabian Sea, Bycatch, conservation status, humpback dolphin, Indian Ocean, Indo-Pacific humpback dolphin, Sousa plumbea, Threat assessment},
pubstate = {published},
tppubtype = {book}
}
The only available population trend estimate for S. chinensis is an estimated 2.46% annual decline in the size of the subpopulation in HK/PRE (Huang et al. 2012), where there are a number of marine parks and reserves in place for dolphin protection, and where the Hong Kong authorities have put more effort into impact assessment and management than in any other part of the species’ range (see Jefferson et al. 2009). The situation elsewhere appears to be more dire, with fisheries bycatch being a nearly-universal threat. Population reductions of at least 3.7% per annum (see below for information that human-caused mortality rates of 3.7% would lead to a 30% decline in abundance over three generations) can therefore be inferred over most of the species’ range, due to known incidental mortality from intensive fishing effort using entangling gears, and ongoing habitat loss and degradation due to coastal development. Vessel collisions and environmental contamination appear to be factors as well, in at least some parts of the range. The above inference is supported in several areas by direct and/or indirect evidence, including documentation of bycatch, the intensive use of gillnets and other fishing gears known to entangle small cetaceans, interviews with fishermen who use entangling gears, and the abandonment of areas of previous occupancy (see Xu et al. 2015).
The Indo-Pacific Humpback Dolphin therefore qualifies for Vulnerable A3cd+4cd, based on an inferred population size reduction, where subcriterion c is interpreted as quality of habitat, and subcriterion d (actual or potential levels of exploitation) includes fisheries bycatch. We can infer a population reduction of greater than or equal to 30% over three generations (75 years), from approximately 1960 in the past to 2035 in the future. This takes into account that the main causes of the suspected/inferred decline in population size, bycatch and habitat destruction/degradation, have not ceased and are not well understood throughout most of the species’ range. Other than in Hong Kong (and to a lesser extent Taiwan), there have been virtually no conservation actions taken to address these threats, and available evidence suggests that they will continue and may even escalate in the future. The assessment of S. chinensis as Vulnerable based on criterion A3cd+4cd applies, regardless of whether or not the Bangladesh/eastern India animals are included, because it is based on population trends, rather than absolute numbers or a declining range.
Jog, Ketki,Sule, Mihir,Bopardikar, Isha,Patankar, Vardhan,Sutaria, Dipani
Living with dolphins: Local ecological knowledge and perceptions of small cetaceans along the Sindhudurg coastline of Maharashtra, India Journal Article
In: Marine Mammal Science, vol. 34, no. 128, pp. 488-498, 2017, ISBN: 1748-7692.
Abstract | Links | BibTeX | Tags: Arabian Sea, Bycatch, cetacean-fisheries interactions, competition, Finless Porpoise, humpback dolphin, India, local ecological knowledge, Marine mammals, Neophocaena phocaenoides, perceptions, Sousa plumbea
@article{,
title = {Living with dolphins: Local ecological knowledge and perceptions of small cetaceans along the Sindhudurg coastline of Maharashtra, India},
author = {Jog, Ketki,Sule, Mihir,Bopardikar, Isha,Patankar, Vardhan,Sutaria, Dipani},
url = {http://dx.doi.org/10.1111/mms.12466},
issn = {1748-7692},
year = {2017},
date = {2017-01-01},
journal = {Marine Mammal Science},
volume = {34},
number = {128},
pages = {488-498},
abstract = {Two near shore small cetaceans occur commonly along the Maharashtra coast, the Indian Ocean humpback dolphin and Indo Pacific finless porpoise. These cetaceans frequently interact with fisheries in this region due to overlap in space and resource use. Besides stranding records, little ecological information is available about these species from Maharashtra. We conducted 143 semistructured interviews to document local ecological knowledge and community perceptions of small cetaceans in 30 coastal fishing villages in Sindhudurg. Perceptions of finless porpoises were largely neutral, whereas humpback dolphins were negative. A classification regression tree (CART) analysis (root node error: 60%) showed that the annual cost of gear damage was an important predictor variable of humpback dolphin perceptions, followed by occupation (gear type) and age. Entanglements were reported for both species in large and small gill nets, and shore seines. Perceived net damage and catch loss due to humpback dolphins was six times greater than that of finless porpoises. However, finless porpoises were reportedly more frequently entangled in gear than humpback dolphins. We provide an insight into the perceptions of cetaceans in the local community and the fisheries-cetacean interactions that shape them.},
keywords = {Arabian Sea, Bycatch, cetacean-fisheries interactions, competition, Finless Porpoise, humpback dolphin, India, local ecological knowledge, Marine mammals, Neophocaena phocaenoides, perceptions, Sousa plumbea},
pubstate = {published},
tppubtype = {article}
}
Moazzam, Mohammed,Nawaz, Rab
Arabian Humpback and Baleen Whale sightings along the Pakistan Coast: Information Generated Through WWF Pakistan’s Fishing Crew Observer Programme Technical Report
no. 168, 2017, ISBN: SC/67A/CMP/05.
Abstract | BibTeX | Tags: Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan
@techreport{,
title = {Arabian Humpback and Baleen Whale sightings along the Pakistan Coast: Information Generated Through WWF Pakistan’s Fishing Crew Observer Programme},
author = {Moazzam, Mohammed,Nawaz, Rab},
issn = { SC/67A/CMP/05},
year = {2017},
date = {2017-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {168},
pages = {16},
abstract = {Historical records and Soviet whaling data indicate the presence of baleen whales off the coast of
Pakistan up to 1965, but since then only a handful of strandings and opportunistic sightings
confirm their ongoing presence in the region. Between 2012 and 2016, observations of freeswimming
and entangled whales were recorded by fishing vessel crew members trained under a
bycatch observer scheme coordinated by WWF Pakistan. The scheme, which started with two
observers in 2012, now involves 75 participating vessels. Reported baleen whale observations
increased from none in 2012, to 16 in 2015. In 2016, 47 sightings of baleen whales were
recorded, including 12 confirmed sightings of Arabian Sea humpback whales, three sightings of
Bryde’s and 32 sightings of baleen whales that could not be identified to species level due to lack
of adequate photographic or video evidence. Sightings reported from 2012 through 2016 are
summarized and plotted, providing insight into the current distribution of Arabian Sea humpback
whales and other baleen whale species in the region. The authors recommend the continuation of
the programme, and suggest that it could serve as a useful model for crew-based reporting
schemes in a region where dedicated cetacean surveys are difficult to conduct, but fisheries are
widespread and active.},
keywords = {Arabian Gulf, Arabian Sea, balaenoptera edeni, Bryde's whale, Bycatch, Entanglement, Humpback Whale, megaptera novaeangliae, Observer programmes, Pakistan},
pubstate = {published},
tppubtype = {techreport}
}
Pakistan up to 1965, but since then only a handful of strandings and opportunistic sightings
confirm their ongoing presence in the region. Between 2012 and 2016, observations of freeswimming
and entangled whales were recorded by fishing vessel crew members trained under a
bycatch observer scheme coordinated by WWF Pakistan. The scheme, which started with two
observers in 2012, now involves 75 participating vessels. Reported baleen whale observations
increased from none in 2012, to 16 in 2015. In 2016, 47 sightings of baleen whales were
recorded, including 12 confirmed sightings of Arabian Sea humpback whales, three sightings of
Bryde’s and 32 sightings of baleen whales that could not be identified to species level due to lack
of adequate photographic or video evidence. Sightings reported from 2012 through 2016 are
summarized and plotted, providing insight into the current distribution of Arabian Sea humpback
whales and other baleen whale species in the region. The authors recommend the continuation of
the programme, and suggest that it could serve as a useful model for crew-based reporting
schemes in a region where dedicated cetacean surveys are difficult to conduct, but fisheries are
widespread and active.
Nanayakkara, Ranil P.,Jefferson, Thomas A.,Abayaratne, Sandaruwan
First records of the Indo-Pacific Finless Porpoise Journal Article
In: Journal of Threatened Taxa, vol. 9, no. 181, pp. 11081-11084, 2017.
Abstract | Links | BibTeX | Tags: Arabian Sea, Finless Porpoise, Neophocaena phocaenoides, Sri Lanka, stranding
@article{,
title = {First records of the Indo-Pacific Finless Porpoise },
author = {Nanayakkara, Ranil P.,Jefferson, Thomas A.,Abayaratne, Sandaruwan},
url = {https://threatenedtaxa.org/index.php/JoTT/article/view/1811},
year = {2017},
date = {2017-01-01},
journal = {Journal of Threatened Taxa},
volume = {9},
number = {181},
pages = {11081-11084},
abstract = {Thirty species of marine mammals have been recorded from Sri Lanka. Amongst them the Indo-Pacific Finless Porpoise Neophocaena phocaenoides is the only representative of the family Phocoenidae. The only previous record from Sri Lanka was a specimen caught on the Wadge Bank by a Smithsonian Carangid Survey team in 1970. Wadge Bank is west of the island and is, in fact, in Indian territorial waters. Here we present the first legitimate records of the Finless Porpoise from Sri Lanka, based on one stranding and three live sightings. Furthermore, the occurrence of threatened species such as the Indo-Pacific Finless Porpoise in the waters of the Palk Bay and the Gulf of Mannar indicates that a cross boundary research initiative between Indian and Sri Lankan scientists, simultaneously focusing on the conservation of the species, is essential. We believe, through such an initiative, a more holistic approach could be adopted when studying and conserving the species, which could then be expanded to encapsulate many other marine species and ecosystems. },
keywords = {Arabian Sea, Finless Porpoise, Neophocaena phocaenoides, Sri Lanka, stranding},
pubstate = {published},
tppubtype = {article}
}
Notarbartolo di Sciara, G,Kerem, D.,Smeenk, C.
Cetaceans of the Red Sea Technical Report
no. 185, 2017.
Abstract | BibTeX | Tags: Arabian Sea, cetaceans, Distribution, Egypt, occurrence, Red Sea, Saudi Arabia
@techreport{,
title = {Cetaceans of the Red Sea},
author = {Notarbartolo di Sciara, G,Kerem, D.,Smeenk, C.},
year = {2017},
date = {2017-01-01},
journal = {CMS Technical series 33},
volume = {33},
number = {185},
pages = {86},
publisher = {Convention on Migratory Species},
abstract = {Based on a review of the literature, complemented by original observations at sea made by the authors during the
past 34 years, the cetacean fauna in the Red Sea appears to be composed of a total of 16 species: three Mysticetes
(Bryde’s whale, Balaenoptera edeni; Omura’s whale, B. omurai; and humpback whale, Megaptera novaeangliae) and
13 Odontocetes (dwarf sperm whale, Kogia sima; killer whale, Orcinus orca; false killer whale, Pseudorca crassidens;
short-finned pilot whale, Globicephala macrorhynchus; Risso’s dolphin, Grampus griseus; Indian Ocean humpback
dolphin, Sousa plumbea; rough-toothed dolphin, Steno bredanensis; Indo-Pacific bottlenose dolphin, Tursiops
aduncus; common bottlenose dolphin, T. truncatus; pantropical spotted dolphin, Stenella attenuata; spinner dolphin,
S. longirostris; striped dolphin, S. coeruleoalba; Indo-Pacific common dolphin, Delphinus delphis tropicalis).
This review presents the very first documented and confirmed sightings of B. omurai, K. sima and S. bredanensis
in the Red Sea. Of all the above species, however, only nine (Bryde’s whale, false killer whale, Risso’s dolphin, Indian
Ocean humpback dolphin, Indo-Pacific bottlenose dolphin, common bottlenose dolphin, pantropical spotted dolphin,
spinner dolphin, and Indo-Pacific common dolphin) appeared to occur regularly in the Red Sea, the remaining seven
only occurring sporadically as vagrants from the Indian Ocean. Even regular species appeared not to be uniformly
distributed throughout the Red Sea, e.g., with Indo-Pacific common dolphins mostly limited to the southern portion
of the region, and the Gulf of Suez only hosting the two bottlenose dolphin species and Indian Ocean humpback
dolphins. No convincing evidence was found of the Red Sea occurrence of two whale species mentioned in the
literature: the common minke whale, Balaenoptera acutorostrata, and the sperm whale, Physeter macrocephalus.
The absence from the region of deep diving species (e.g., Ziphiidae and the sperm whale) can be explained by the
geomorphology of the Straits of Bab al Mandab, with its extended shallow sill likely to discourage incursions by
such species into the Red Sea. The coordinated effort and the different expertise of the authors has contributed to
amending previous mistakes and inaccuracies, verifying and validating specimen identification, highlighting features
of relevance for species taxonomy and, most importantly, drawing a fundamental baseline to inform conservation of
cetaceans in the Red Sea},
keywords = {Arabian Sea, cetaceans, Distribution, Egypt, occurrence, Red Sea, Saudi Arabia},
pubstate = {published},
tppubtype = {techreport}
}
past 34 years, the cetacean fauna in the Red Sea appears to be composed of a total of 16 species: three Mysticetes
(Bryde’s whale, Balaenoptera edeni; Omura’s whale, B. omurai; and humpback whale, Megaptera novaeangliae) and
13 Odontocetes (dwarf sperm whale, Kogia sima; killer whale, Orcinus orca; false killer whale, Pseudorca crassidens;
short-finned pilot whale, Globicephala macrorhynchus; Risso’s dolphin, Grampus griseus; Indian Ocean humpback
dolphin, Sousa plumbea; rough-toothed dolphin, Steno bredanensis; Indo-Pacific bottlenose dolphin, Tursiops
aduncus; common bottlenose dolphin, T. truncatus; pantropical spotted dolphin, Stenella attenuata; spinner dolphin,
S. longirostris; striped dolphin, S. coeruleoalba; Indo-Pacific common dolphin, Delphinus delphis tropicalis).
This review presents the very first documented and confirmed sightings of B. omurai, K. sima and S. bredanensis
in the Red Sea. Of all the above species, however, only nine (Bryde’s whale, false killer whale, Risso’s dolphin, Indian
Ocean humpback dolphin, Indo-Pacific bottlenose dolphin, common bottlenose dolphin, pantropical spotted dolphin,
spinner dolphin, and Indo-Pacific common dolphin) appeared to occur regularly in the Red Sea, the remaining seven
only occurring sporadically as vagrants from the Indian Ocean. Even regular species appeared not to be uniformly
distributed throughout the Red Sea, e.g., with Indo-Pacific common dolphins mostly limited to the southern portion
of the region, and the Gulf of Suez only hosting the two bottlenose dolphin species and Indian Ocean humpback
dolphins. No convincing evidence was found of the Red Sea occurrence of two whale species mentioned in the
literature: the common minke whale, Balaenoptera acutorostrata, and the sperm whale, Physeter macrocephalus.
The absence from the region of deep diving species (e.g., Ziphiidae and the sperm whale) can be explained by the
geomorphology of the Straits of Bab al Mandab, with its extended shallow sill likely to discourage incursions by
such species into the Red Sea. The coordinated effort and the different expertise of the authors has contributed to
amending previous mistakes and inaccuracies, verifying and validating specimen identification, highlighting features
of relevance for species taxonomy and, most importantly, drawing a fundamental baseline to inform conservation of
cetaceans in the Red Sea
Rosenbaum, H. C.,Kershaw, F.,Mendez, M.,Pomilla, C.,Leslie, M. S.,Findlay, K. P.,Best, P. B.,Collins, T.,Vely, M.,Engel, M. H.,Baldwin, R.,Minton, G.,Meÿer, M.,Flórez-González, L.,Poole, M. M.,Hauser, N.,Garrigue, C.,Brasseur, M.,Bannister, J.,Anderson, M.,Olavarría, C.,Baker, C. S.
First circumglobal assessment of Southern Hemisphere humpback whale mitochondrial genetic variation and implications for management Journal Article
In: Endangered Species Research, vol. 32, no. 213, pp. 551-567, 2017.
Abstract | Links | BibTeX | Tags: Arabian Sea, breeding grounds, Genetic differentiation, Humpback Whale, megaptera novaeangliae, mtDNA, population structure, Stock assessment
@article{,
title = {First circumglobal assessment of Southern Hemisphere humpback whale mitochondrial genetic variation and implications for management},
author = {Rosenbaum, H. C.,Kershaw, F.,Mendez, M.,Pomilla, C.,Leslie, M. S.,Findlay, K. P.,Best, P. B.,Collins, T.,Vely, M.,Engel, M. H.,Baldwin, R.,Minton, G.,Meÿer, M.,Flórez-González, L.,Poole, M. M.,Hauser, N.,Garrigue, C.,Brasseur, M.,Bannister, J.,Anderson, M.,Olavarría, C.,Baker, C. S.},
url = {http://www.int-res.com/abstracts/esr/v32/p551-567/},
year = {2017},
date = {2017-01-01},
journal = {Endangered Species Research},
volume = {32},
number = {213},
pages = {551-567},
abstract = {ABSTRACT: The description of genetic population structure over a species geographic range can provide insights into its evolutionary history and also support effective management efforts. Assessments for globally distributed species are rare, however, requiring significant international coordination and collaboration. The global distribution of demographically discrete populations for the humpback whale \textit{Megaptera novaeangliae} is not fully known, hampering the definition of appropriate management units. Here, we present the first circumglobal assessment of mitochondrial genetic population structure across the species range in the Southern Hemisphere and Arabian Sea. We combine new and existing data from the mitochondrial (mt)DNA control region that resulted in a 311 bp consensus sequence of the mtDNA control region for 3009 individuals sampled across 14 breeding stocks and subpopulations currently recognized by the International Whaling Commission. We assess genetic diversity and test for genetic differentiation and also estimate the magnitude and directionality of historic matrilineal gene flow between putative populations. Our results indicate that maternally directed site fidelity drives significant genetic population structure between breeding stocks within ocean basins. However, patterns of connectivity differ across the circumpolar range, possibly as a result of differences in the extent of longitudinal movements on feeding areas. The number of population comparisons observed to be significantly differentiated were found to diminish at the subpopulation scale when nucleotide differences were examined, indicating that more complex processes underlie genetic structure at this scale. It is crucial that these complexities and uncertainties are afforded greater consideration in management and regulatory efforts.},
keywords = {Arabian Sea, breeding grounds, Genetic differentiation, Humpback Whale, megaptera novaeangliae, mtDNA, population structure, Stock assessment},
pubstate = {published},
tppubtype = {article}
}
Sutaria, D.,Sule, M.,Jog, K.,Bopardikar, I.,Jamalabad, A.,Panicker, D.
Baleen Whale Records from India Technical Report
no. 241, 2017, ISBN: SC/67A/CMP/03_Rev.
Abstract | BibTeX | Tags: acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding
@techreport{,
title = {Baleen Whale Records from India},
author = {Sutaria, D.,Sule, M.,Jog, K.,Bopardikar, I.,Jamalabad, A.,Panicker, D.},
issn = { SC/67A/CMP/03_Rev},
year = {2017},
date = {2017-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {241},
pages = {16},
abstract = {The current presence of three baleen whale species, the blue whale (Balaenoptera musculus), Bryde’s
whale (Balaenoptera edeni) and the humpback whale (Megaptera novaeangliae) was assessed along
the Indian coastline via sighting and stranding records. The available literature was reviewed to
understand the frequency and distribution of stranding events along the coastline. Fisherfolk were
interviewed to obtain information on baleen whale sightings and community perceptions towards
whales. We found that blue and Bryde’s whales are recorded from both the east and west coasts and
humpback whales from the west coast only. During 2015-2016, the majority of strandings were
reported from Maharashtra and Karnataka. In March 2017, at least one humpback whale sighting was
confirmed from recorded vocalisations off the Goa coast. An investigation of the ongoing fisheries has
also revealed a steep decline in commercial fisheries and an 82% decline in the Sardines in 2015-16.
With this scenario in mind, we recommend continuation of dedicated baleen whale surveys and
collaborative efforts with local regional authorities to carry out in-depth analyses of strandings and
document the ecology of whales in Indian waters.},
keywords = {acoustics, Arabian Gulf, Arabian Sea, balaenoptera edeni, balaenoptera musculus, Blue whale, Bryde's whale, Entanglement, Humpback Whale, megaptera novaeangliae, Persian Gulf, ship strike, song, stranding},
pubstate = {published},
tppubtype = {techreport}
}
whale (Balaenoptera edeni) and the humpback whale (Megaptera novaeangliae) was assessed along
the Indian coastline via sighting and stranding records. The available literature was reviewed to
understand the frequency and distribution of stranding events along the coastline. Fisherfolk were
interviewed to obtain information on baleen whale sightings and community perceptions towards
whales. We found that blue and Bryde’s whales are recorded from both the east and west coasts and
humpback whales from the west coast only. During 2015-2016, the majority of strandings were
reported from Maharashtra and Karnataka. In March 2017, at least one humpback whale sighting was
confirmed from recorded vocalisations off the Goa coast. An investigation of the ongoing fisheries has
also revealed a steep decline in commercial fisheries and an 82% decline in the Sardines in 2015-16.
With this scenario in mind, we recommend continuation of dedicated baleen whale surveys and
collaborative efforts with local regional authorities to carry out in-depth analyses of strandings and
document the ecology of whales in Indian waters.
Willson, A.,Baldwin, R.,Collins, T.,Godley, B.J.,Minton, G.,Al Harthi, S.,Pikesley, Stephen K,Witt, Matthew J
Preliminary ensemble ecological niche modelling of Arabian Sea humpback whale vessel sightings and satellite telemetry data Technical Report
no. 502, 2017, ISBN: SC/67A/CMP/15.
Abstract | BibTeX | Tags: Arabian Gulf, Arabian Sea, ensemble niche modeling, habitat modelling, habitat preference, Humpback Whale, megaptera novaeangliae, Persian Gulf, Satellite telemetry
@techreport{,
title = {Preliminary ensemble ecological niche modelling of Arabian Sea humpback whale vessel sightings and satellite telemetry data},
author = {Willson, A.,Baldwin, R.,Collins, T.,Godley, B.J.,Minton, G.,Al Harthi, S.,Pikesley, Stephen K,Witt, Matthew J},
issn = { SC/67A/CMP/15},
year = {2017},
date = {2017-01-01},
journal = {Document presented to the meeting of the Scientific Committee of the International Whaling Commission},
number = {502},
pages = {17},
abstract = {Ensemble ecological niche modelling (EENM) can provide insight into the relationship between marine mammals and
their environment and can predict distribution beyond the range of observed locations. The technique can be used to
identify sites for future field research and guide conservation and management activities. The spatial ecology of Arabian
Sea humpback whales (ASHWs) has been described off the coast of Oman, although a paucity of information exists
from which to describe their distribution across the rest of their potential range. Here we present an ensemble ecological
niche modelling framework to predict habitat suitability of ASHWs across the north Indian Ocean. Sightings data from
Oman-based small vessel surveys (2003-2014) and satellite telemetry records (2014-2016) were used along with
environmental co-variate data from a season between December and May. Net primary productivity featured as the only
co-variate with a strong influence on models for both datasets. Model test evaluation metrics scored >0.9, and mapped
outputs of likely distribution highlighted spatial similarity across multiple models. Telemetry data predicted suitable
habitat to be further offshore than the models derived from sightings data. All resulting distribution maps described
areas of high suitability (index value <0.75) along the southern and central coast of Oman and of the northern Arabian
Sea between the Gulf of Kutch and sub-marine canyon features off the Indus delta. There was good spatial concordance
between ensemble model predictions with actual locations of Soviet catches of humpback whales in the northern Indian
Ocean between 1964 and 1966. Both the telemetry and the sightings data were temporally sporadic in their coverage
(across months) and biologically biased (towards males) and as such results from our preliminary efforts should be
considered in light of these caveats. However, these preliminary results are valuable and indicate likely co-occurrence
with high density shipping traffic routes in the region and target additional areas for focussed field surveys. Results
from this study should be considered together with results of recent north Indian Ocean blue whale ENM studies to help
guide future research and conservation management objectives in the region.},
keywords = {Arabian Gulf, Arabian Sea, ensemble niche modeling, habitat modelling, habitat preference, Humpback Whale, megaptera novaeangliae, Persian Gulf, Satellite telemetry},
pubstate = {published},
tppubtype = {techreport}
}
their environment and can predict distribution beyond the range of observed locations. The technique can be used to
identify sites for future field research and guide conservation and management activities. The spatial ecology of Arabian
Sea humpback whales (ASHWs) has been described off the coast of Oman, although a paucity of information exists
from which to describe their distribution across the rest of their potential range. Here we present an ensemble ecological
niche modelling framework to predict habitat suitability of ASHWs across the north Indian Ocean. Sightings data from
Oman-based small vessel surveys (2003-2014) and satellite telemetry records (2014-2016) were used along with
environmental co-variate data from a season between December and May. Net primary productivity featured as the only
co-variate with a strong influence on models for both datasets. Model test evaluation metrics scored >0.9, and mapped
outputs of likely distribution highlighted spatial similarity across multiple models. Telemetry data predicted suitable
habitat to be further offshore than the models derived from sightings data. All resulting distribution maps described
areas of high suitability (index value <0.75) along the southern and central coast of Oman and of the northern Arabian
Sea between the Gulf of Kutch and sub-marine canyon features off the Indus delta. There was good spatial concordance
between ensemble model predictions with actual locations of Soviet catches of humpback whales in the northern Indian
Ocean between 1964 and 1966. Both the telemetry and the sightings data were temporally sporadic in their coverage
(across months) and biologically biased (towards males) and as such results from our preliminary efforts should be
considered in light of these caveats. However, these preliminary results are valuable and indicate likely co-occurrence
with high density shipping traffic routes in the region and target additional areas for focussed field surveys. Results
from this study should be considered together with results of recent north Indian Ocean blue whale ENM studies to help
guide future research and conservation management objectives in the region.
Allison, C.
IWC individual catch database Version 6.1 Journal Article
In: vol. Version 18 July, 2016, no. 6, 2016.
BibTeX | Tags: Arabian Sea, Blue whale, Bryde’s whale, catch, Distribution, Humpback Whale, Soviet whaling, sperm whale, whaling
@article{,
title = {IWC individual catch database Version 6.1},
author = {Allison, C.},
year = {2016},
date = {2016-01-01},
volume = {Version 18 July, 2016},
number = {6},
keywords = {Arabian Sea, Blue whale, Bryde’s whale, catch, Distribution, Humpback Whale, Soviet whaling, sperm whale, whaling},
pubstate = {published},
tppubtype = {article}
}
Amaral, A. R.,Collins, T.,Minton, G.,Baldwin, R.,Willson, A.,Kershaw, Francine,Gray, H.,Findlay, K.,Brownell Jr, R.L.,Rosenbaum, H. C.
Update on Genetic Analyses of Arabian Sea Humpback Whales Technical Report
no. 9, 2016.
Abstract | BibTeX | Tags: Arabian Sea, breeding grounds, feeding grounds, genetics, Gulf of Masirah, Humpback Whale, megaptera novaeangliae, Microsatellite, sexing
@techreport{,
title = {Update on Genetic Analyses of Arabian Sea Humpback Whales},
author = {Amaral, A. R.,Collins, T.,Minton, G.,Baldwin, R.,Willson, A.,Kershaw, Francine,Gray, H.,Findlay, K.,Brownell Jr, R.L.,Rosenbaum, H. C.},
year = {2016},
date = {2016-01-01},
journal = {Working Paper presented to the Scientific Committee of the International Whaling Commission},
number = {9},
pages = {6},
publisher = {IWC},
abstract = {From the 49 new samples, 44 were successfully genotyped at 10 microsatellite loci. We identified 27 males and 17 females. Within this dataset, 7 duplicate samples were found. Five samples representing 3 individuals in the 2015 dataset registered as genotypic matches with animals sampled in the 2004 dataset. An additional 9 samples involving 6 individuals that represent potential matches between the 2015 and 2004 dataset are being reviewed to determine if they represent inter-year recaptures. As the data were generated very recently, further checks to clarify issues with some microsatellite loci will be completed. Six samples failed to amplify consistently for sexing markers and need to be revisited.
Analysis of the combined genotypic dataset will be completed by the end of June/early July 2016. The genotypic matches and sexing data will be incorporated into the Oman Photo-ID database, and used to generate robust updated photo-ID and genotypic mark-recapture estimates of population abundance. These data have also been used to determine or confirm the sex of the 9 satellite tagged whales off the coast of Oman (see SH28), and a significant number of other whales identified photographically off the coast of Oman. This will prove highly valuable if future satellite tagging efforts are undertaken in Oman, as previous tagging work has been significantly male-biased (See SH28), and future tagging should target known females.
Preliminary assessment of the new sexing data (although not yet fully complete) is providing valuable insight into possible difference in habitat use between the two primary study sites off the coast of Oman (see Figure 1). Minton et al. (2011) documented a heavy bias toward males in Dhofar and a ratio near parity in the Gulf of Masirah. These results were based on the total number of photographic captures of known sex individuals. The combination of new and old sexing information allows for a more nuanced examination of this phenomenon: the male-female ratio based on individual whales for which sex was determined in each study site (regardless of how frequently they were observed) is 2:1 in Dhofar (n=30), whilst in the Gulf of Masirah this ratio is slightly biased toward females, with 45% of individuals of known sex observed in that study area being male, and 55% female (n=49). More detailed analysis of these sexing data in relation to survey effort and photographic identification data will yield further important insights into habitat use, behaviour, and social interactions, critical for the conservation of this population.},
keywords = {Arabian Sea, breeding grounds, feeding grounds, genetics, Gulf of Masirah, Humpback Whale, megaptera novaeangliae, Microsatellite, sexing},
pubstate = {published},
tppubtype = {techreport}
}
Analysis of the combined genotypic dataset will be completed by the end of June/early July 2016. The genotypic matches and sexing data will be incorporated into the Oman Photo-ID database, and used to generate robust updated photo-ID and genotypic mark-recapture estimates of population abundance. These data have also been used to determine or confirm the sex of the 9 satellite tagged whales off the coast of Oman (see SH28), and a significant number of other whales identified photographically off the coast of Oman. This will prove highly valuable if future satellite tagging efforts are undertaken in Oman, as previous tagging work has been significantly male-biased (See SH28), and future tagging should target known females.
Preliminary assessment of the new sexing data (although not yet fully complete) is providing valuable insight into possible difference in habitat use between the two primary study sites off the coast of Oman (see Figure 1). Minton et al. (2011) documented a heavy bias toward males in Dhofar and a ratio near parity in the Gulf of Masirah. These results were based on the total number of photographic captures of known sex individuals. The combination of new and old sexing information allows for a more nuanced examination of this phenomenon: the male-female ratio based on individual whales for which sex was determined in each study site (regardless of how frequently they were observed) is 2:1 in Dhofar (n=30), whilst in the Gulf of Masirah this ratio is slightly biased toward females, with 45% of individuals of known sex observed in that study area being male, and 55% female (n=49). More detailed analysis of these sexing data in relation to survey effort and photographic identification data will yield further important insights into habitat use, behaviour, and social interactions, critical for the conservation of this population.
Buultjens, Jeremy,Ratnayke, Iraj,Gnanapala, Athula
Whale watching in Sri Lanka: Perceptions of sustainability Journal Article
In: Tourism Management Perspectives, vol. 18, no. 62, pp. 125-133, 2016, ISBN: 2211-9736.
Abstract | BibTeX | Tags: Arabian Sea, impact, management, regulations, Sri Lanka, Sustainability, Whale watching
@article{,
title = {Whale watching in Sri Lanka: Perceptions of sustainability},
author = {Buultjens, Jeremy,Ratnayke, Iraj,Gnanapala, Athula},
issn = {2211-9736},
year = {2016},
date = {2016-01-01},
journal = {Tourism Management Perspectives},
volume = {18},
number = {62},
pages = {125-133},
abstract = {Whale watching creates an economic value for whales beyond consumption and therefore assists in the conservation of the species. However sustainable management is needed to avoid deleterious impacts on the whales and the industry. This paper uses a range of qualitative methods to examine the characteristics, management and perceived sustainability of the relatively newly established whale watching industry in Sri Lanka. It is clear that the laissez faire development of the industry has resulted in some poor conservation outcomes for the
whales as well as variable tourist experiences. The Sri Lankan government has introduced legislated regulations aimed at managing the industry however it must ensure adequate human and financial resources are provided to ensure the effective implementation of the regulations and therefore the sustainability of the industry.},
keywords = {Arabian Sea, impact, management, regulations, Sri Lanka, Sustainability, Whale watching},
pubstate = {published},
tppubtype = {article}
}
whales as well as variable tourist experiences. The Sri Lankan government has introduced legislated regulations aimed at managing the industry however it must ensure adequate human and financial resources are provided to ensure the effective implementation of the regulations and therefore the sustainability of the industry.
Cerchio, S,Willson, A.,Muirhead, C.,Minton, G.,Collins, T.,Baldwin, R.,Sarrouf Willson, M.,Al Harthi, S.
Preliminary Report on Long-term Detection of Arabian Sea Humpback Whale Vocalizations off Oman Technical Report
no. 343, 2016.
Abstract | BibTeX | Tags: acoustic detection, Arabian Sea, behaviour, breeding grounds, Humpback Whale, megaptera novaeangliae, Oman, Passive acoustic detection, song
@techreport{,
title = {Preliminary Report on Long-term Detection of Arabian Sea Humpback Whale Vocalizations off Oman},
author = {Cerchio, S,Willson, A.,Muirhead, C.,Minton, G.,Collins, T.,Baldwin, R.,Sarrouf Willson, M.,Al Harthi, S.},
year = {2016},
date = {2016-01-01},
journal = {Report Presented to the Scientific Committee meeting of the International Whaling Commission},
number = {343},
publisher = {IWC},
abstract = {This report presents an overview of the progress to date on the humpback whale detection
component of the Arabian Sea Humpback Whale Acoustic Research program off Oman. Three
archival acoustic recorders were deployed at sites in two regions for approximately one year each,
in Hallaniyats Bay during 2011/2012, and the Gulf of Masirah during 2012/2013. Performance of
recorders varied among deployments, but despite some challenges due to equipment failures we
succeeded in documenting spatiotemporal patterns in the presence of humpback whales in a large
dataset. Several key findings broaden our understanding of the Arabian Sea humpback whale
population off Oman. There appears a strong seasonal component to the use of song by this
population, primarily from November through May, which is congruent with the Northern
Hemisphere breeding cycle and singing season. Throughout this period, singing was heard in both
Hallaniyats Bay and the Gulf of Masirah, separated by approximately 400km, indicating that the
population utilizes both of these regions. However, there was a much stronger presence in
Hallaniyats Bay, with song heard nearly 24 hours/day during the peak months, and song detected
simultaneously at multiple sites across the Bay. Previous boat-based survey data indicated similar
trends, however, given limitation in the duration of this fieldwork the current acoustic dataset
provides a more reliable indication of this population’s breeding related activity. This suggests that
the Hallaniyats Bay might serve as a more important habitat for breeding activity than the
monitored region of the Gulf of Masirah. There also appeared to be a subtle northward shift in
distribution of detections as the singing season progressed, both within Hallaniyats Bay, and from
Hallaniyats Bay to the Gulf of Masirah, suggesting a seasonal shift in distribution for singing males.
During the summer and autumn months, very little song was detected, however sparse detections
indicate that whales are present in both regions during at least some of this period. It is
recommended that similar acoustic monitoring be conducted in all range states of the population to
elucidate spatiotemporal distribution throughout the Arabian Sea.},
keywords = {acoustic detection, Arabian Sea, behaviour, breeding grounds, Humpback Whale, megaptera novaeangliae, Oman, Passive acoustic detection, song},
pubstate = {published},
tppubtype = {techreport}
}
component of the Arabian Sea Humpback Whale Acoustic Research program off Oman. Three
archival acoustic recorders were deployed at sites in two regions for approximately one year each,
in Hallaniyats Bay during 2011/2012, and the Gulf of Masirah during 2012/2013. Performance of
recorders varied among deployments, but despite some challenges due to equipment failures we
succeeded in documenting spatiotemporal patterns in the presence of humpback whales in a large
dataset. Several key findings broaden our understanding of the Arabian Sea humpback whale
population off Oman. There appears a strong seasonal component to the use of song by this
population, primarily from November through May, which is congruent with the Northern
Hemisphere breeding cycle and singing season. Throughout this period, singing was heard in both
Hallaniyats Bay and the Gulf of Masirah, separated by approximately 400km, indicating that the
population utilizes both of these regions. However, there was a much stronger presence in
Hallaniyats Bay, with song heard nearly 24 hours/day during the peak months, and song detected
simultaneously at multiple sites across the Bay. Previous boat-based survey data indicated similar
trends, however, given limitation in the duration of this fieldwork the current acoustic dataset
provides a more reliable indication of this population’s breeding related activity. This suggests that
the Hallaniyats Bay might serve as a more important habitat for breeding activity than the
monitored region of the Gulf of Masirah. There also appeared to be a subtle northward shift in
distribution of detections as the singing season progressed, both within Hallaniyats Bay, and from
Hallaniyats Bay to the Gulf of Masirah, suggesting a seasonal shift in distribution for singing males.
During the summer and autumn months, very little song was detected, however sparse detections
indicate that whales are present in both regions during at least some of this period. It is
recommended that similar acoustic monitoring be conducted in all range states of the population to
elucidate spatiotemporal distribution throughout the Arabian Sea.
IWC
Report of the Scientific Committee of the International Whaling Commission 2016 Technical Report
no. 121, 2016.
BibTeX | Tags: Arabian Sea, International Whaling Commission, management, Southern Hemisphere, Stock identity
@techreport{,
title = {Report of the Scientific Committee of the International Whaling Commission 2016},
author = {IWC},
year = {2016},
date = {2016-01-01},
volume = {66b},
number = {121},
pages = {138},
publisher = {International Whaling Commission},
keywords = {Arabian Sea, International Whaling Commission, management, Southern Hemisphere, Stock identity},
pubstate = {published},
tppubtype = {techreport}
}
IWC
Report of the Scientific Committee of the International Whaling Commission 2016: Annex H: Report of the Sub-Committee on Other Southern Hemisphere Whale Stocks Technical Report
no. 122, 2016.
BibTeX | Tags: Arabian Sea, International Whaling Commission, management, Southern Hemisphere, Stock identity
@techreport{,
title = {Report of the Scientific Committee of the International Whaling Commission 2016: Annex H: Report of the Sub-Committee on Other Southern Hemisphere Whale Stocks},
author = {IWC},
year = {2016},
date = {2016-01-01},
volume = {66b},
number = {122},
pages = {44},
publisher = {International Whaling Commission},
keywords = {Arabian Sea, International Whaling Commission, management, Southern Hemisphere, Stock identity},
pubstate = {published},
tppubtype = {techreport}
}
NOAA
Endangered and Threatened Species; Identification of 14 Distinct Population Segments of the Humpback Whale (Megaptera novaeangliae) and Revision of Species-wide Listing
2016.
Abstract | BibTeX | Tags: Arabian Sea, breeding grounds, conservation status, feeding grounds, Humpback Whale, marine mammal, megaptera novaeangliae, population status, USA
@{,
title = {Endangered and Threatened Species; Identification of 14 Distinct Population Segments of the Humpback Whale (Megaptera novaeangliae) and Revision of Species-wide Listing},
author = {NOAA},
issn = {Docket No. 130708594-6598-03},
year = {2016},
date = {2016-01-01},
number = {183},
pages = {247},
publisher = {Department of Commerce},
abstract = {We, NMFS, issue a final determination to revise the listing status of the
humpback whale (Megaptera novaeangliae) under the Endangered Species Act (ESA).
We divide the globally listed endangered species into 14 distinct population segments
(DPS), remove the current species-level listing, and in its place list four DPSs as
endangered and one DPS as threatened. Based on their current statuses, the remaining
nine DPSs do not warrant listing. At this time, we find that critical habitat is not
determinable for the three listed DPSs that occur in U.S. waters (Western North Pacific,
Mexico, Central America); we will consider designating critical habitat for these three
DPSs in a separate rulemaking. },
keywords = {Arabian Sea, breeding grounds, conservation status, feeding grounds, Humpback Whale, marine mammal, megaptera novaeangliae, population status, USA},
pubstate = {published},
tppubtype = {}
}
humpback whale (Megaptera novaeangliae) under the Endangered Species Act (ESA).
We divide the globally listed endangered species into 14 distinct population segments
(DPS), remove the current species-level listing, and in its place list four DPSs as
endangered and one DPS as threatened. Based on their current statuses, the remaining
nine DPSs do not warrant listing. At this time, we find that critical habitat is not
determinable for the three listed DPSs that occur in U.S. waters (Western North Pacific,
Mexico, Central America); we will consider designating critical habitat for these three
DPSs in a separate rulemaking.
NOAA
Taking and Importing of Marine Mammals and Dolphin-Safe Tuna Products Journal Article
In: Federal Register, vol. 81, no. 421, pp. 3, 2016.
Abstract | BibTeX | Tags: Arabian Sea, Bycatch, Fisheries, India, Marine mammals, NIO, Observer programmes, Oman, Pakistan, reporting scheme, Tanzania, tuna fishery
@article{,
title = {Taking and Importing of Marine Mammals and Dolphin-Safe Tuna Products },
author = {NOAA},
year = {2016},
date = {2016-01-01},
journal = {Federal Register},
volume = {81},
number = {421},
pages = {3},
abstract = { The Assistant Administrator
for Fisheries, NMFS, (Assistant
Administrator) has issued a
determination, under the Dolphin
Protection Consumer Information Act
(DPCIA), of regular and significant
mortality and serious injury of dolphins
in gillnet fisheries harvesting tuna by
vessels flagged under the Governments
of India, Iran, Mozambique, Pakistan,
Oman, Saudi Arabia, Sri Lanka,
Tanzania, the United Arab Emirates,
and Yemen. This determination triggers
additional documentation requirements
for tuna product from those fisheries
that is exported from or offered for sale
in the United States, including that such
tuna must be accompanied by a written
statement executed by an observer
participating in a national or
international program acceptable to the
Assistant Administrator, in addition to
such statement by the captain of the
vessel, that certifies that no dolphins
were killed or seriously injured in the
sets or other gear deployments in which
the tuna were caught and certain other
required information regarding dolphin
interactions and segregation of tuna.
These determinations were based on
review of scientific information and,
when available, documentary evidence
submitted by the relevant government. },
keywords = {Arabian Sea, Bycatch, Fisheries, India, Marine mammals, NIO, Observer programmes, Oman, Pakistan, reporting scheme, Tanzania, tuna fishery},
pubstate = {published},
tppubtype = {article}
}
for Fisheries, NMFS, (Assistant
Administrator) has issued a
determination, under the Dolphin
Protection Consumer Information Act
(DPCIA), of regular and significant
mortality and serious injury of dolphins
in gillnet fisheries harvesting tuna by
vessels flagged under the Governments
of India, Iran, Mozambique, Pakistan,
Oman, Saudi Arabia, Sri Lanka,
Tanzania, the United Arab Emirates,
and Yemen. This determination triggers
additional documentation requirements
for tuna product from those fisheries
that is exported from or offered for sale
in the United States, including that such
tuna must be accompanied by a written
statement executed by an observer
participating in a national or
international program acceptable to the
Assistant Administrator, in addition to
such statement by the captain of the
vessel, that certifies that no dolphins
were killed or seriously injured in the
sets or other gear deployments in which
the tuna were caught and certain other
required information regarding dolphin
interactions and segregation of tuna.
These determinations were based on
review of scientific information and,
when available, documentary evidence
submitted by the relevant government.
Ranjbar, Sharif,Dakhteh, Mohammad Sayed,Van Waerebeek, Koen
In: bioRxiv, no. 202, 2016.
Abstract | Links | BibTeX | Tags: Arabian Gulf, Arabian Sea, balaenoptera omurai, Distribution, Iran, Persian Gulf, stranding
@article{,
title = {Omura's whale (Balaenoptera omurai) stranding on Qeshm Island, Iran: further evidence for a wide (sub)tropical distribution, including the Persian Gulf},
author = {Ranjbar, Sharif,Dakhteh, Mohammad Sayed,Van Waerebeek, Koen},
url = {http://biorxiv.org/content/biorxiv/early/2016/03/07/042614.full.pdf},
year = {2016},
date = {2016-01-01},
journal = {bioRxiv},
number = {202},
abstract = {A small, juvenile rorqual live-stranded on Qeshm Island, Iran, in the northern Strait of Hormuz (Persian Gulf) in September 2007. Cause of stranding remains unknown but the whale (QE22.09.2007) showed no severe traumatic injuries nor was emaciated. Based on at least seven morphological features, considered diagnostic in combination, allowed a positive identification as Omura's whale Balaenoptera omurai. Features included diminutive body size (397 cm), a large number of ventral grooves (n=82) extending caudad of the umbilicus, a strongly falcate dorsal fin, asymmetric colouration of the head (especially lower jaws) reminiscent of fin whale, including three unilateral dark stripes, faint/incomplete lateral rostral ridges, record low number of short, broad baleen plates (204 in right jaw). The likelihood for the existence of a local B. omurai population in the eastern Persian Gulf or northern Arabian Sea seems higher than the wandering of a very young animal or mother/calf pair from any of the known distant distribution areas in the eastern Indian Ocean or SW Indian Ocean (Madagascar). This is the first record of B. omurai in the NW Indian Ocean.},
keywords = {Arabian Gulf, Arabian Sea, balaenoptera omurai, Distribution, Iran, Persian Gulf, stranding},
pubstate = {published},
tppubtype = {article}
}
Baldwin, R.,Willson, Andrew,Collins, T.J.Q.
Watching out for whales: industry responsibility to address threats to Arabian Sea humpback whales, Gulf of Masirah, Oman Technical Report
no. 312, 2015.
Abstract | BibTeX | Tags: Arabian Sea, Humpback Whale, megaptera novaeangliae, mitigation, seismic, ship strike, vessel traffic
@techreport{,
title = {Watching out for whales: industry responsibility to address threats to Arabian Sea humpback whales, Gulf of Masirah, Oman},
author = {Baldwin, R.,Willson, Andrew,Collins, T.J.Q.},
year = {2015},
date = {2015-01-01},
journal = {Report presented to the 66th meeting of the Scientific Committee of the International Whaling Commission},
number = {312},
pages = {10},
abstract = {Research on Arabian Sea humpback whales in Oman over the past 15 years has revealed that the Gulf of Masirah is a hot spot for this Endangered population and the only part of its known range where males and females are found at near parity. This information has been used by a partnership of industry, consultancy and NGO in Oman to develop mitigation related to port operations and hydrocarbon exploration in the area. This has included the development of a Whale Management and Mitigation Programme to be implemented by the Port of Duqm Company, as well as mitigation procedures that were used by a seismic survey contractor in late 2014. Impacts to whales nevertheless remain, including a collision between seismic equipment and a whale in December 2014, suggesting that further development of protection measures for the Arabian Sea humpback whale is still required. },
keywords = {Arabian Sea, Humpback Whale, megaptera novaeangliae, mitigation, seismic, ship strike, vessel traffic},
pubstate = {published},
tppubtype = {techreport}
}
Mahanty, Madan M,Latha, G,Thirunavukkarasu, A
Analysis of humpback whale sounds in shallow waters of the Southeastern Arabian Sea: An indication of breeding habitat Journal Article
In: Journal of biosciences, vol. 40, no. 148, pp. 407-417, 2015, ISBN: 0250-5991.
Abstract | BibTeX | Tags: Arabian Sea, behaviour, breeding grounds, Humpback Whale, India, megaptera novaeangliae, song
@article{,
title = {Analysis of humpback whale sounds in shallow waters of the Southeastern Arabian Sea: An indication of breeding habitat},
author = {Mahanty, Madan M,Latha, G,Thirunavukkarasu, A},
issn = {0250-5991},
year = {2015},
date = {2015-01-01},
journal = {Journal of biosciences},
volume = {40},
number = {148},
pages = {407-417},
abstract = {The primary objective of this work was to present the acoustical identification of humpback whales, detected by using
an autonomous ambient noise measurement system, deployed in the shallow waters of the Southeastern Arabian Sea
(SEAS) during the period January to May 2011. Seven types of sounds were detected. These were characteristically
upsweeps and downsweeps along with harmonics. Sounds produced repeatedly in a specific pattern were referred to as
phrases (PQRS and ABC). Repeated phrases in a particular pattern were referred to as themes, and from the
spectrographic analysis, two themes (I and II) were identified. The variation in the acoustic characteristics such as
fundamental frequency, range, duration of the sound unit, and the structure of the phrases and themes are discussed.
Sound units were recorded from mid-January to mid-March, with a peak in February, when the mean SST is ~28°C,
and no presence was recorded after mid-March. The temporal and thematic structures strongly determine the functions
of the humpback whale song form. Given the use of song in the SEAS, this area is possibly used as an active breeding
habitat by humpback whales during the winter season.},
keywords = {Arabian Sea, behaviour, breeding grounds, Humpback Whale, India, megaptera novaeangliae, song},
pubstate = {published},
tppubtype = {article}
}
an autonomous ambient noise measurement system, deployed in the shallow waters of the Southeastern Arabian Sea
(SEAS) during the period January to May 2011. Seven types of sounds were detected. These were characteristically
upsweeps and downsweeps along with harmonics. Sounds produced repeatedly in a specific pattern were referred to as
phrases (PQRS and ABC). Repeated phrases in a particular pattern were referred to as themes, and from the
spectrographic analysis, two themes (I and II) were identified. The variation in the acoustic characteristics such as
fundamental frequency, range, duration of the sound unit, and the structure of the phrases and themes are discussed.
Sound units were recorded from mid-January to mid-March, with a peak in February, when the mean SST is ~28°C,
and no presence was recorded after mid-March. The temporal and thematic structures strongly determine the functions
of the humpback whale song form. Given the use of song in the SEAS, this area is possibly used as an active breeding
habitat by humpback whales during the winter season.
Minton, G.,Reeves, R. R.,Collins, T.J.Q.,Willson, Andrew
Report on the Arabian Sea Humpback Whale Workshop: Developing a collaborative research and conservation strategy Technical Report
no. 417, 2015.
Abstract | Links | BibTeX | Tags: Arabian Sea, conservation, Humpback Whale, management, megaptera novaeangliae
@techreport{,
title = {Report on the Arabian Sea Humpback Whale Workshop: Developing a collaborative research and conservation strategy},
author = {Minton, G.,Reeves, R. R.,Collins, T.J.Q.,Willson, Andrew},
url = {https://arabianseawhalenetwork.org/wp-content/uploads/2016/12/arabian-sea-humpback-whale-workshop-report-_final2-1.pdf},
year = {2015},
date = {2015-01-01},
number = {417},
pages = {50},
abstract = {Executive Summary
Humpback whales in the Arabian Sea (ASHWs) form a discrete population that is designated as an endangered
“subpopulation” on the IUCN Red List of Threatened Species. The primary objective of the workshop was to
bring together regional scientists and conservationists who share concern for ASHWs (and other cetaceans in
the region) and to begin developing a unified, collaborative research and conservation strategy that could be
readily communicated to governments, intergovernmental organizations non-governmental organizations,
donors and research colleagues.
Researchers and international experts presented summaries of what is known about the distribution, biology
and threats to humpback whales in each of the represented Arabian Sea range states, as well as information
about research techniques and tools for collaboration that could facilitate the implementation of a regional
conservation-based research strategy.
Participants identified the main threats to whales in the region and knowledge gaps that must be filled in order
to assess and protect ASHWs. Almost all current knowledge about this population is based on data collected in
the Sultanate of Oman, which is the only country in which dedicated humpback whale research has taken
place in recent years. The shortage of information on the population’s full range and population size outside
of Oman is one of the most significant impediments to the pursuit of a regional conservation strategy. Many
of the workshop recommendations focus on harnessing the formal and informal networks and capacity of
participants to fill these knowledge gaps.
The workshop made the following recommendations for follow-up action:
1. Form an Arabian Sea Humpback Whale Research Network: To include development of a mission
statement and objectives and a clear set of conservation- and research-related roles for the members
2. Identify a focal point in each ASHW range state responsible for liaising with the network coordination
team and for 1) verification and documentation of all ASHW stranding and sighting reports, 2)
working with local communities, coastguards and others to collect data opportunistically and 3)
assistance in drafting funding proposals and research plans for country-based or cross-border priority
areas (in the most likely suspected current range of ASHW)
3. Develop a common (web-based) platform for sharing documents, data and research protocols among
network members. To include, if possible, a regional Photo-ID matching platform.
4. Establish data-sharing agreements for any web-based/group-wide data repositories, and memoranda
of understanding between partners who embark on shared analyses to ensure proper data ownership
and publication rights.
5. Produce a "glossy” presentation of ASHW background and conservation concerns that network
partners can use to raise awareness and attract funding.
6. Engage in dedicated fund-raising efforts to support network coordination and research activities at
both national and regional scales.
7. Implement regional research activities that include passive acoustic monitoring at strategic locations,
dedicated boat surveys for genetic sampling, photo-Identification and collecting data on distribution
and numbers, and further analyses of acoustic and genetic data already obtained from Oman and
other locations.
8. Create a common pool of equipment and other resources that can be used for research and analysis
in different range states as required
4
9. Encourage Master’s and PhD candidates from range states to conduct research and conservation
work on ASHWs.
10. Execute a large-scale GIS exercise - mapping all known/confirmed ASHW sightings (with effort indices
when available) and strandings for analysis of spatial/temporal trends, as well as overlap with known
threats (e.g. shipping lanes, high-density fisheries that use gillnets or vertical lines, oil and gas
exploration and development sites).
11. Maintain liaisons with international and inter-governmental organisations that can support the
network’s aims and objectives and ensure that network findings/results are applied toward regional
and international management and conservation frameworks.},
keywords = {Arabian Sea, conservation, Humpback Whale, management, megaptera novaeangliae},
pubstate = {published},
tppubtype = {techreport}
}
Humpback whales in the Arabian Sea (ASHWs) form a discrete population that is designated as an endangered
“subpopulation” on the IUCN Red List of Threatened Species. The primary objective of the workshop was to
bring together regional scientists and conservationists who share concern for ASHWs (and other cetaceans in
the region) and to begin developing a unified, collaborative research and conservation strategy that could be
readily communicated to governments, intergovernmental organizations non-governmental organizations,
donors and research colleagues.
Researchers and international experts presented summaries of what is known about the distribution, biology
and threats to humpback whales in each of the represented Arabian Sea range states, as well as information
about research techniques and tools for collaboration that could facilitate the implementation of a regional
conservation-based research strategy.
Participants identified the main threats to whales in the region and knowledge gaps that must be filled in order
to assess and protect ASHWs. Almost all current knowledge about this population is based on data collected in
the Sultanate of Oman, which is the only country in which dedicated humpback whale research has taken
place in recent years. The shortage of information on the population’s full range and population size outside
of Oman is one of the most significant impediments to the pursuit of a regional conservation strategy. Many
of the workshop recommendations focus on harnessing the formal and informal networks and capacity of
participants to fill these knowledge gaps.
The workshop made the following recommendations for follow-up action:
1. Form an Arabian Sea Humpback Whale Research Network: To include development of a mission
statement and objectives and a clear set of conservation- and research-related roles for the members
2. Identify a focal point in each ASHW range state responsible for liaising with the network coordination
team and for 1) verification and documentation of all ASHW stranding and sighting reports, 2)
working with local communities, coastguards and others to collect data opportunistically and 3)
assistance in drafting funding proposals and research plans for country-based or cross-border priority
areas (in the most likely suspected current range of ASHW)
3. Develop a common (web-based) platform for sharing documents, data and research protocols among
network members. To include, if possible, a regional Photo-ID matching platform.
4. Establish data-sharing agreements for any web-based/group-wide data repositories, and memoranda
of understanding between partners who embark on shared analyses to ensure proper data ownership
and publication rights.
5. Produce a "glossy” presentation of ASHW background and conservation concerns that network
partners can use to raise awareness and attract funding.
6. Engage in dedicated fund-raising efforts to support network coordination and research activities at
both national and regional scales.
7. Implement regional research activities that include passive acoustic monitoring at strategic locations,
dedicated boat surveys for genetic sampling, photo-Identification and collecting data on distribution
and numbers, and further analyses of acoustic and genetic data already obtained from Oman and
other locations.
8. Create a common pool of equipment and other resources that can be used for research and analysis
in different range states as required
4
9. Encourage Master’s and PhD candidates from range states to conduct research and conservation
work on ASHWs.
10. Execute a large-scale GIS exercise - mapping all known/confirmed ASHW sightings (with effort indices
when available) and strandings for analysis of spatial/temporal trends, as well as overlap with known
threats (e.g. shipping lanes, high-density fisheries that use gillnets or vertical lines, oil and gas
exploration and development sites).
11. Maintain liaisons with international and inter-governmental organisations that can support the
network’s aims and objectives and ensure that network findings/results are applied toward regional
and international management and conservation frameworks.
Nanayakkara, Ranil P.,Herath, H. M. J. C. B.,Mel, Ruvinda K. de,Kusuminda, T. G. Tharaka
Molecular Genetic Identification of Beached Whales in Sri Lanka from Mitochondrial DNA Sequence Data Journal Article
In: Ceylon Journal of Science, vol. 43, no. 179, pp. 73, 2015.
Abstract | BibTeX | Tags: Arabian Sea, balaenoptera musculus, Blue whale, genetics, Indian Ocean, mtDNA, Sri Lanka
@article{,
title = {Molecular Genetic Identification of Beached Whales in Sri Lanka from Mitochondrial DNA Sequence Data},
author = {Nanayakkara, Ranil P.,Herath, H. M. J. C. B.,Mel, Ruvinda K. de,Kusuminda, T. G. Tharaka},
year = {2015},
date = {2015-01-01},
journal = {Ceylon Journal of Science},
volume = {43},
number = {179},
pages = {73},
abstract = {In the current study we attempt to identify eight baleen whale carcasses that were washed ashore to the Western, Northwestern and Southern coasts of Sri Lanka in 2010, using molecular phylogenetic techniques. Initial physical examination suggested that these carcasses belonged to blue whales ( Balaenoptera musculus ). Analysis of sequences of the mitochondrial control region from baleen whales confirmed that the samples belonged to blue whales ( Balaenoptera musculus ). However, it was impossible to identify the population of blue whales the individuals belonged to, due to the lack of strong population genetic signals in the mitochondrial control region sequences.},
keywords = {Arabian Sea, balaenoptera musculus, Blue whale, genetics, Indian Ocean, mtDNA, Sri Lanka},
pubstate = {published},
tppubtype = {article}
}
Anderson, R Charles
Cetaceans and tuna fisheries in the Western and Central Indian Ocean Journal Article
In: International Pole and Line Federation Technical Report, vol. 2, no. 10, pp. 133, 2014.
Abstract | Links | BibTeX | Tags: Arabian Sea, Bycatch, cetaceans, Fisheries, Gill net, mitigation, Northern Indian Ocean, Regional management units, Tuna
@article{,
title = {Cetaceans and tuna fisheries in the Western and Central Indian Ocean},
author = {Anderson, R Charles},
url = {http://www.fao.org/3/a-bg252e.pdf},
year = {2014},
date = {2014-01-01},
journal = {International Pole and Line Federation Technical Report},
volume = {2},
number = {10},
pages = {133},
abstract = {This report reviews information on interactions between cetaceans (whales and
dolphins) and tuna fisheries in the western and central Indian Ocean. The average
annual catch of tuna and related species in the Indian Ocean was just over 1.5 million
tonnes during 2008-12. Of this, almost 1.1 million tonnes (71%) came from the
western and central Indian Ocean. The main fisheries for tuna and tuna-like species
in the region are gillnet (40% of reported catch during 2008-12), purse seine (26%),
longline (12%), handline and troll (11%) and pole-and-line (9%).
Major gillnet fishing nations include Iran, India, Sri Lanka, Pakistan, Oman and Yemen.
Cetacean bycatch must be large, but is poorly documented. A rough estimation,
based on the limited published information available, suggests that something
in excess of 60,000 small cetaceans might be taken as bycatch each year. There is
an urgent need for monitoring and management of these fisheries including the
development of mitigation methods to reduce cetacean bycatch. Large-scale gillnetting
on the high seas (using nets in excess of 2.5km length) is banned by both
UN convention and IOTC resolution, but is being carried out by Iran, Pakistan and
possibly also other countries; compliance is required. More generally, the large and
still expanding gillnet capacity within the region needs to be assessed, and if appropriate
either capped or reduced.
Purse seining in the western and central Indian Ocean is dominated by French and
Spanish fleets. An increasing proportion of sets is made on drifting fish aggregating
devices (FADs) but there has been, and continues to be, a considerable number of
sets made on free schools (i.e. non-FAD-associated tuna schools). Most cetaceans do
not regularly associate with FADs and the major potential cetacean interactions are
with free school sets. During 1981-1999, 9.6% of all sets were reported to have been
made in association with baleen whales, probably Bryde’s whales (Balaenoptera
brydei). When encircled, most whales are reported to escape by breaking through
the net. Mortality is unknown, but may have been of the order of 10s annually. The
association of free schools of large yellowfin tuna with dolphins (mostly spotted
dolphins Stenella attenuata and spinner dolphins Stenella longrostris) is more contentious.
This association (which is common in the Eastern Tropical Pacific and is
exploited by the purse seine fishery there) has always been reported to be rare in the
western Indian Ocean. However, the tuna-dolphin association is common in many
coastal areas of the region and widespread in the high seas of the western Indian
Ocean north of 10°S. Setting on dolphin schools has been also reported to be rare,
but its true scale is questioned. Setting on cetaceans has recently been banned by
EU regulation (2007) and IOTC resolution (2013), so cetacean bycatch and mortality
should be much reduced in the future. 100% coverage by international observers
would be ideal.
Longline fisheries were dominated for several decades by East Asian nations, but
now increasing catches are made by coastal countries, notably India, Sri Lanka and
Seychelles. A major issue for longliners is depredation – removal of bait and damage
of hooked fish by sharks and cetaceans. Several species of cetacean have been
implicated, but the main one appears to be the false killer whale (Pseudorca crassidens).
There is also some entanglement of cetaceans in longlines (likely following
attempts at depredation). Development of mitigation measures is on-going and
needs to be continued. It is possible that some longline fishermen are deliberately
killing cetaceans.
Several coastal countries have handline fisheries for large yellowfin tuna, which fishermen
locate by their association with dolphins (mainly spotted and spinner dolphins).
There is anecdotal evidence that some dolphins are hooked. Although they
invariably break free or are released, the scale of any post-release mortality or of
sub-lethal impacts is unknown. From the Maldivian pole-and-line fishery, there are
reports of dolphins (probably Indo-pacific bottlenose dolphins, Tursiops aduncus)
taking fish attracted by the lights used during night bait fishing. The scale and potential
impacts of these interactions require assessment.
There has been a widespread failure to monitor and manage cetacean bycatch in
Indian Ocean tuna fisheries, and to develop and implement mitigation measures.
The enormous, and still growing, gillnet capacity in the region should be of particular
concern. There is a need for increased observer coverage of all fisheries, supplemented
by electronic monitoring. Fishery-independent surveys of cetacean distribution
and abundance in the western Indian Ocean are also required to inform
management.},
keywords = {Arabian Sea, Bycatch, cetaceans, Fisheries, Gill net, mitigation, Northern Indian Ocean, Regional management units, Tuna},
pubstate = {published},
tppubtype = {article}
}
dolphins) and tuna fisheries in the western and central Indian Ocean. The average
annual catch of tuna and related species in the Indian Ocean was just over 1.5 million
tonnes during 2008-12. Of this, almost 1.1 million tonnes (71%) came from the
western and central Indian Ocean. The main fisheries for tuna and tuna-like species
in the region are gillnet (40% of reported catch during 2008-12), purse seine (26%),
longline (12%), handline and troll (11%) and pole-and-line (9%).
Major gillnet fishing nations include Iran, India, Sri Lanka, Pakistan, Oman and Yemen.
Cetacean bycatch must be large, but is poorly documented. A rough estimation,
based on the limited published information available, suggests that something
in excess of 60,000 small cetaceans might be taken as bycatch each year. There is
an urgent need for monitoring and management of these fisheries including the
development of mitigation methods to reduce cetacean bycatch. Large-scale gillnetting
on the high seas (using nets in excess of 2.5km length) is banned by both
UN convention and IOTC resolution, but is being carried out by Iran, Pakistan and
possibly also other countries; compliance is required. More generally, the large and
still expanding gillnet capacity within the region needs to be assessed, and if appropriate
either capped or reduced.
Purse seining in the western and central Indian Ocean is dominated by French and
Spanish fleets. An increasing proportion of sets is made on drifting fish aggregating
devices (FADs) but there has been, and continues to be, a considerable number of
sets made on free schools (i.e. non-FAD-associated tuna schools). Most cetaceans do
not regularly associate with FADs and the major potential cetacean interactions are
with free school sets. During 1981-1999, 9.6% of all sets were reported to have been
made in association with baleen whales, probably Bryde’s whales (Balaenoptera
brydei). When encircled, most whales are reported to escape by breaking through
the net. Mortality is unknown, but may have been of the order of 10s annually. The
association of free schools of large yellowfin tuna with dolphins (mostly spotted
dolphins Stenella attenuata and spinner dolphins Stenella longrostris) is more contentious.
This association (which is common in the Eastern Tropical Pacific and is
exploited by the purse seine fishery there) has always been reported to be rare in the
western Indian Ocean. However, the tuna-dolphin association is common in many
coastal areas of the region and widespread in the high seas of the western Indian
Ocean north of 10°S. Setting on dolphin schools has been also reported to be rare,
but its true scale is questioned. Setting on cetaceans has recently been banned by
EU regulation (2007) and IOTC resolution (2013), so cetacean bycatch and mortality
should be much reduced in the future. 100% coverage by international observers
would be ideal.
Longline fisheries were dominated for several decades by East Asian nations, but
now increasing catches are made by coastal countries, notably India, Sri Lanka and
Seychelles. A major issue for longliners is depredation – removal of bait and damage
of hooked fish by sharks and cetaceans. Several species of cetacean have been
implicated, but the main one appears to be the false killer whale (Pseudorca crassidens).
There is also some entanglement of cetaceans in longlines (likely following
attempts at depredation). Development of mitigation measures is on-going and
needs to be continued. It is possible that some longline fishermen are deliberately
killing cetaceans.
Several coastal countries have handline fisheries for large yellowfin tuna, which fishermen
locate by their association with dolphins (mainly spotted and spinner dolphins).
There is anecdotal evidence that some dolphins are hooked. Although they
invariably break free or are released, the scale of any post-release mortality or of
sub-lethal impacts is unknown. From the Maldivian pole-and-line fishery, there are
reports of dolphins (probably Indo-pacific bottlenose dolphins, Tursiops aduncus)
taking fish attracted by the lights used during night bait fishing. The scale and potential
impacts of these interactions require assessment.
There has been a widespread failure to monitor and manage cetacean bycatch in
Indian Ocean tuna fisheries, and to develop and implement mitigation measures.
The enormous, and still growing, gillnet capacity in the region should be of particular
concern. There is a need for increased observer coverage of all fisheries, supplemented
by electronic monitoring. Fishery-independent surveys of cetacean distribution
and abundance in the western Indian Ocean are also required to inform
management.
Nanayakkara, Ranil,de Mel, Ruvinda,Kusuminda, Tharaka,Cabral de Mel, Surendranie
Surface and dive times of the Blue Whale ( Journal Article
In: NeBIO I An international journal of environment and biodiversity, vol. Vol. 5, No. 4, no. 177, pp. 1-3, 2014.
Abstract | BibTeX | Tags: Arabian Sea, balaenoptera musculus, Blue whale, dive duration, dive time, feeding, Indian Ocean, Sri Lanka, Surfacing behaviour
@article{,
title = {Surface and dive times of the Blue Whale (},
author = {Nanayakkara, Ranil,de Mel, Ruvinda,Kusuminda, Tharaka,Cabral de Mel, Surendranie},
year = {2014},
date = {2014-01-01},
journal = {NeBIO I An international journal of environment and biodiversity},
volume = {Vol. 5, No. 4},
number = {177},
pages = {1-3},
abstract = {Dive times of a single Blue Whale observed in Trincomalee Bay, Sri Lanka, in relation to the abiotic parameters of the bay’s waters and its ability to support large densities of krill from May 2011 to July 2011. Thirty five total dives were observed and its mean dive time was 9.6 ± 0.31 min. The observed whale’s feeding dives lasted longer than what has been previously recorded for blue whales in the Pacific Ocean. The mean salinity, Mean Total Suspended Solids (TSS) and mean temperature of Trincomalee Bay was respectively 28.1± 4.8 ppt, 9.92 ± 0.3 mg/L and 28.81 ± 0.96 0 C. All studied abiotic parameters of Trincomalee Bay show that it is able to support large concentrations of krill. Trincomalee Bay thus seems to serve as a highly productive hunting ground for Blue Whales in the northern Indian Ocean.},
keywords = {Arabian Sea, balaenoptera musculus, Blue whale, dive duration, dive time, feeding, Indian Ocean, Sri Lanka, Surfacing behaviour},
pubstate = {published},
tppubtype = {article}
}