Baş, Aylin,Erdoğan, Mehmet Akif,Richard Charles Morris, Neil,Yeoman, Kathryn,Humphrey, Ophelie,Gaggioli, Elisa,Roland, Chloe
Seasonal encounter rates and residency patterns of an unstudied population of bottlenose dolphin ( Journal Article
In: Hyla: Herpetological Bulletin, vol. Vol.2016, no. 325, pp. 1-13, 2017.
Abstract | BibTeX | Tags: Antalya Bay, bottlenose dolphin, Distribution, Levantine Sea, residency, tursiops truncatus
@article{,
title = {Seasonal encounter rates and residency patterns of an unstudied population of bottlenose dolphin (},
author = {Baş, Aylin,Erdoğan, Mehmet Akif,Richard Charles Morris, Neil,Yeoman, Kathryn,Humphrey, Ophelie,Gaggioli, Elisa,Roland, Chloe},
year = {2017},
date = {2017-01-01},
journal = {Hyla: Herpetological Bulletin},
volume = {Vol.2016},
number = {325},
pages = {1-13},
abstract = {Insufficient data regarding abundance, distribution and movement patterns of bottlenose dolphins has contributed to lack of effective conservation strategies within the Levantine Sea. It has been inferred that the bottlenose dolphin population has decreased by 30 % in the last 60 years, thus a basin wide research effort on the population is an urgent priority. We present the preliminary results of the first bottlenose dolphin photo-identification study in the northwestern Levantine Sea. 32 boat surveys were conducted from March 2015 to July 2016, totalling 1433 km of survey effort. Current study reported an uneven distribution, high seasonal encounters and varied residency patterns of bottlenose dolphins within the northwestern Levantine Sea. We propose that the northwestern Levantine Sea, specifically the coastal waters of Antalya Bay, indeed is an important bottlenose dolphin habitat and adjacent waters may be of similar significance. Of the 51 individuals catalogued, 13 were re-sighted in both years. Encounter rates varied seasonally, with a peak in spring of 12 groups and 100 individuals per 100 km. Dolphin presence was not detected during autumn and winter. While seasonal, visitor and transient dolphins were reported, no year-round residency was documented. Incidental observations of visible starvation signs and skin parasites suggested individual dolphins in this region could be under anthropogenic stressors. The results reported here highlight the importance of baseline information on encounter rate, distribution and residency pattern as they have a key role on the assessment of population statues and the threats they are facing. Future studies with annual survey effort, have to be continued in the northwestern Levantine Sea and its adjacent waters.},
keywords = {Antalya Bay, bottlenose dolphin, Distribution, Levantine Sea, residency, tursiops truncatus},
pubstate = {published},
tppubtype = {article}
}
Insufficient data regarding abundance, distribution and movement patterns of bottlenose dolphins has contributed to lack of effective conservation strategies within the Levantine Sea. It has been inferred that the bottlenose dolphin population has decreased by 30 % in the last 60 years, thus a basin wide research effort on the population is an urgent priority. We present the preliminary results of the first bottlenose dolphin photo-identification study in the northwestern Levantine Sea. 32 boat surveys were conducted from March 2015 to July 2016, totalling 1433 km of survey effort. Current study reported an uneven distribution, high seasonal encounters and varied residency patterns of bottlenose dolphins within the northwestern Levantine Sea. We propose that the northwestern Levantine Sea, specifically the coastal waters of Antalya Bay, indeed is an important bottlenose dolphin habitat and adjacent waters may be of similar significance. Of the 51 individuals catalogued, 13 were re-sighted in both years. Encounter rates varied seasonally, with a peak in spring of 12 groups and 100 individuals per 100 km. Dolphin presence was not detected during autumn and winter. While seasonal, visitor and transient dolphins were reported, no year-round residency was documented. Incidental observations of visible starvation signs and skin parasites suggested individual dolphins in this region could be under anthropogenic stressors. The results reported here highlight the importance of baseline information on encounter rate, distribution and residency pattern as they have a key role on the assessment of population statues and the threats they are facing. Future studies with annual survey effort, have to be continued in the northwestern Levantine Sea and its adjacent waters.
Gray, H. W. I.,Nishida, S.,Welch, A. J.,Moura, A. E.,Tanabe, S.,Kiani, M. S.,Culloch, R.,Möller, L.,Natoli, A.,Ponnampalam, L. S.,Minton, G.,Gore, M.,Collins, T.,Willson, A.,Baldwin, R.,Hoelzel, A. R.
Cryptic Lineage Differentiation Among Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) in the Northwest Indian Ocean Journal Article
In: Molecular Phylogenetics and Evolution, no. 381, 2017, ISBN: 1055-7903.
Abstract | Links | BibTeX | Tags: bottlenose dolphin, conservation, Indian Ocean, Phylogeography, Pleistocene, taxonomy, tursiops aduncus
@article{,
title = {Cryptic Lineage Differentiation Among Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) in the Northwest Indian Ocean},
author = {Gray, H. W. I.,Nishida, S.,Welch, A. J.,Moura, A. E.,Tanabe, S.,Kiani, M. S.,Culloch, R.,Möller, L.,Natoli, A.,Ponnampalam, L. S.,Minton, G.,Gore, M.,Collins, T.,Willson, A.,Baldwin, R.,Hoelzel, A. R.},
url = {https://www.sciencedirect.com/science/article/pii/S1055790317300635},
issn = {1055-7903},
year = {2017},
date = {2017-01-01},
journal = {Molecular Phylogenetics and Evolution},
number = {381},
abstract = {Phylogeography can provide insight into the potential for speciation and identify geographic regions and evolutionary processes associated with species richness and evolutionary endemism. In the marine environment, highly mobile species sometimes show structured patterns of diversity, but the processes isolating populations and promoting differentiation are often unclear. The Delphinidae (oceanic dolphins) are a striking case in point and, in particular, bottlenose dolphins (Tursiops spp.). Understanding the radiation of species in this genus is likely to provide broader inference about the processes that determine patterns of biogeography and speciation, because both fine-scale structure over a range of kilometers and relative panmixia over an oceanic range are known for Tursiops populations. In our study, novel Tursiops spp. sequences from the northwest Indian Ocean (including mitogenomes and two nuDNA loci) are included in a worldwide Tursiops spp. phylogeographic analysis. We discover a new ‘aduncus’ type lineage in the Arabian Sea (off India, Pakistan and Oman) that diverged from the Australasian lineage },
keywords = {bottlenose dolphin, conservation, Indian Ocean, Phylogeography, Pleistocene, taxonomy, tursiops aduncus},
pubstate = {published},
tppubtype = {article}
}
Phylogeography can provide insight into the potential for speciation and identify geographic regions and evolutionary processes associated with species richness and evolutionary endemism. In the marine environment, highly mobile species sometimes show structured patterns of diversity, but the processes isolating populations and promoting differentiation are often unclear. The Delphinidae (oceanic dolphins) are a striking case in point and, in particular, bottlenose dolphins (Tursiops spp.). Understanding the radiation of species in this genus is likely to provide broader inference about the processes that determine patterns of biogeography and speciation, because both fine-scale structure over a range of kilometers and relative panmixia over an oceanic range are known for Tursiops populations. In our study, novel Tursiops spp. sequences from the northwest Indian Ocean (including mitogenomes and two nuDNA loci) are included in a worldwide Tursiops spp. phylogeographic analysis. We discover a new ‘aduncus’ type lineage in the Arabian Sea (off India, Pakistan and Oman) that diverged from the Australasian lineage
Ponnampalam, L.
No Danger in Sight? An Observation of Sperm Whales (Physeter macrocephalus) in Marguerite Formation off Muscat, Sultanate of Oman Journal Article
In: Aquatic Mammals, vol. 42, no. 432, pp. 162-167, 2016.
Abstract | BibTeX | Tags: bottlenose dolphin, Grampus griseus, Interspecies interactions, Oman, Physeter macrocephalus, predation, Risso's dolphin, Social behaviour, sperm whale, tursiops sp
@article{,
title = {No Danger in Sight? An Observation of Sperm Whales (Physeter macrocephalus) in Marguerite Formation off Muscat, Sultanate of Oman},
author = {Ponnampalam, L.},
year = {2016},
date = {2016-01-01},
journal = {Aquatic Mammals},
volume = {42},
number = {432},
pages = { 162-167},
abstract = {The note documents a sperm whale encounter off Muscat where roughly 35 individuals formed a marguerite but not in response to any obvious threat or danger. Bottlenose dolphins and rissos dolphins were present.},
keywords = {bottlenose dolphin, Grampus griseus, Interspecies interactions, Oman, Physeter macrocephalus, predation, Risso's dolphin, Social behaviour, sperm whale, tursiops sp},
pubstate = {published},
tppubtype = {article}
}
The note documents a sperm whale encounter off Muscat where roughly 35 individuals formed a marguerite but not in response to any obvious threat or danger. Bottlenose dolphins and rissos dolphins were present.
Braulik,G.,Ranjbar,S.,Owfi,F.,Aminrad,T.,Dakhteh,S.M.H.,Kamrani,E.,Mohsenizadeh,F.
Marine Mammal Records from Iran Journal Article
In: Journal of Cetacean Research and Management, vol. 11, no. 334, pp. 49-63, 2010.
Abstract | BibTeX | Tags: abundance, bottlenose dolphin, Bryde's whale, Common dolphin, conservation, Distribution, dolphin, dugong, fin whale, Finless Porpoise, fishing gear, Gulf of Oman, Humpback Whale, humpback whales, incidental capture, killer whale, location, mammals, management, marine, marine mammal, Marine mammals, mortality, mysticete, mysticetes, Oman, Porpoise, Risso's dolphin, rough-toothed dolphin, Spinner dolphin, whale, whales
@article{,
title = {Marine Mammal Records from Iran},
author = {Braulik,G.,Ranjbar,S.,Owfi,F.,Aminrad,T.,Dakhteh,S.M.H.,Kamrani,E.,Mohsenizadeh,F.},
year = {2010},
date = {2010-01-01},
journal = {Journal of Cetacean Research and Management},
volume = {11},
number = {334},
pages = {49-63},
abstract = {A total of 114 marine mammal records of 14 species were compiled from Iranian coastalwaters of the Persian Gulf and Gulf of Oman. Eighty-one were from the Persian Gulf, 23from the Gulf of Oman and 10 were of unknown location. Records of finless porpoise(Neophocaena phocaenoides) (24), Indo-pacific humpback dolphin (Sousa chinensis) (22)and Indo-pacific bottlenose dolphin (Tursiops aduncus) (21) were by far the most numerousa probable reflection of their inshore distribution and local abundance. Other speciesrecorded were common dolphin (Delphinus capensis tropicalis), rough-toothed dolphin(Steno bredanensis), striped dolphin (Stenella coeruleoalba), spinner dolphin (Stenellalongirostris), Risso's dolphin (Grampus griseus), false killer whale (Pseudorca crassidens),sperm whale (Physeter macrocephalus) and dugong (Dugong dugon). Records of 24Mysticetes were compiled, 11 of which were tentatively identified as Bryde's whales(Balaenoptera edeni), three as Fin whales (Balaenoptera physalus), three as Humpbackwhales (Megaptera novaeangliae) and the remainder were unidentified. The largest threat tomarine mammals in Iran is likely to be incidental capture in fishing gear. Nine finlessporpoises were recorded as bycatch and this and other coastal species may be declining dueto unsustainable mortality rates. Other threats to the marine environment are discussed andrecommended marine mammal conservation and management small projects are described.},
keywords = {abundance, bottlenose dolphin, Bryde's whale, Common dolphin, conservation, Distribution, dolphin, dugong, fin whale, Finless Porpoise, fishing gear, Gulf of Oman, Humpback Whale, humpback whales, incidental capture, killer whale, location, mammals, management, marine, marine mammal, Marine mammals, mortality, mysticete, mysticetes, Oman, Porpoise, Risso's dolphin, rough-toothed dolphin, Spinner dolphin, whale, whales},
pubstate = {published},
tppubtype = {article}
}
A total of 114 marine mammal records of 14 species were compiled from Iranian coastalwaters of the Persian Gulf and Gulf of Oman. Eighty-one were from the Persian Gulf, 23from the Gulf of Oman and 10 were of unknown location. Records of finless porpoise(Neophocaena phocaenoides) (24), Indo-pacific humpback dolphin (Sousa chinensis) (22)and Indo-pacific bottlenose dolphin (Tursiops aduncus) (21) were by far the most numerousa probable reflection of their inshore distribution and local abundance. Other speciesrecorded were common dolphin (Delphinus capensis tropicalis), rough-toothed dolphin(Steno bredanensis), striped dolphin (Stenella coeruleoalba), spinner dolphin (Stenellalongirostris), Risso's dolphin (Grampus griseus), false killer whale (Pseudorca crassidens),sperm whale (Physeter macrocephalus) and dugong (Dugong dugon). Records of 24Mysticetes were compiled, 11 of which were tentatively identified as Bryde's whales(Balaenoptera edeni), three as Fin whales (Balaenoptera physalus), three as Humpbackwhales (Megaptera novaeangliae) and the remainder were unidentified. The largest threat tomarine mammals in Iran is likely to be incidental capture in fishing gear. Nine finlessporpoises were recorded as bycatch and this and other coastal species may be declining dueto unsustainable mortality rates. Other threats to the marine environment are discussed andrecommended marine mammal conservation and management small projects are described.
Reeves, R.R.,Brownell Jr, R.L.
Indo-Pacific bottlenose dolphin assessment workshop report: Solomon Islands case study of Journal Article
In: Occasional Paper of the Species Survival Commission, IUCN, Gland, vol. 40, no. 203, pp. 53, 2009.
Abstract | BibTeX | Tags: bottlenose dolphin, captive dolphin trade, Live capture, solomon islands, tursiops aduncus
@article{,
title = {Indo-Pacific bottlenose dolphin assessment workshop report: Solomon Islands case study of },
author = {Reeves, R.R.,Brownell Jr, R.L.},
year = {2009},
date = {2009-01-01},
journal = {Occasional Paper of the Species Survival Commission, IUCN, Gland},
volume = {40},
number = {203},
pages = {53},
abstract = {A workshop on the assessment of Indo-Pacific bottlenose dolphins (Tursiops aduncus), with the Solomon Islands as a case study, took place from 21-23 August 2008 in Apia, Samoa. It was planned and organized under the auspices of the Cetacean Specialist Group and attended by 19 invited participants from eight countries. Financial support was provided by WWF (International), The Ocean Conservancy, Animal Welfare Institute, Humane Society of the United States, Whale and Dolphin Conservation Society, U.S. Marine Mammal Commission and U.S. National Oceanic and Atmospheric Administration. The workshop was hosted by the Secretariat of the Pacific Regional Environment Programme (SPREP).
Live-capture, holding in captivity and export of Indo-Pacific bottlenose dolphins from the Solomon Islands began in 2003. These activities stimulated global interest and generated concern about the potential conservation implications. The IUCN Global Plan of Action for the Conservation of Cetaceans had stated that as a general principle, small cetaceans should not be captured or removed from a wild population unless that specific population has been assessed and shown capable of sustaining the removals. A principal goal of the present workshop was to elaborate on the elements of an assessment that would meet this standard. Participants noted that an assessment involving delineation of stock boundaries, abundance, reproductive potential, mortality and trend cannot necessarily be achieved quickly or inexpensively.
Specific topics covered by the workshop included management goals and assessment options, general biology and life history of bottlenose dolphins, forms of direct removal of dolphins from the wild, other threat factors, defining units to conserve, methods for estimating population size and assessment algorithms (e.g. population viability analysis). A framework for assessment was outlined, suggestions for genetic sampling and analyses were developed, and cultural and other local considerations for researchers working in the Pacific Islands region were summarised.
There is a need to determine the conservation status of Indo-Pacific bottlenose dolphin populations around islands where human-caused mortality or removal (direct or incidental catch) is known to be occurring. The species has a limited coastal range throughout much of the Indo-Pacific Ocean except in areas with wide continental shelves. Its near-shore distribution makes it particularly vulnerable to exploitation and other anthropogenic threats. In some regions where these dolphins have been studied, the populations have been found to be small compared to nearby open-ocean populations of common bottlenose dolphins (T. truncatus) and other species. The only known large concentrations (> ca. 1,000) are in regions with large shallow-water areas, e.g. Shark Bay on the western coast of Australia, North Stradbroke Island on the eastern coast of Australia and the Arabian Gulf. Given the restricted areas of potentially suitable habitat, populations of T. aduncus in the South Pacific islands are likely small, i.e. in the hundreds.
The government of the Solomon Islands had issued a permit for export of up to 80 dolphins per year (CITES Secretariat document AC 23 Doc.8.5) and it was reported at the workshop that the annual allowable export level was being increased to 100 dolphins of any species, but most likely to be only T. aduncus. If an international standard rule allowing 1% or 2% of a population to be removed annually (per IWC, ASCOBANS etc.) were applied in this instance, the local T. aduncus population would have to be at least 5,000 or 10,000 to sustain the permitted level of exports.
Based on the current state of knowledge of Indo-Pacific bottlenose dolphins throughout their range, as well as the information on this species in the Solomon Islands reviewed at the workshop, abundance in the area of recent live-captures appears to be well below 5,000. By the time of the workshop, an ongoing photo-identification study around Guadalcanal Island had catalogued only somewhat more than 100 individuals. Population assessment efforts need to be expanded if live-capture activities are to continue. It was concluded that the best approach to assess abundance and delineate populations would be a combination of mark-recapture analyses of photo-identification data and genetic analyses of tissue samples. It is assumed that Indo-Pacific bottlenose dolphins are not taken in the drive hunt in the Solomon Islands, but if they are, then both types of removal – live-capture and hunting – would need to be considered in any assessment of population status.},
keywords = {bottlenose dolphin, captive dolphin trade, Live capture, solomon islands, tursiops aduncus},
pubstate = {published},
tppubtype = {article}
}
A workshop on the assessment of Indo-Pacific bottlenose dolphins (Tursiops aduncus), with the Solomon Islands as a case study, took place from 21-23 August 2008 in Apia, Samoa. It was planned and organized under the auspices of the Cetacean Specialist Group and attended by 19 invited participants from eight countries. Financial support was provided by WWF (International), The Ocean Conservancy, Animal Welfare Institute, Humane Society of the United States, Whale and Dolphin Conservation Society, U.S. Marine Mammal Commission and U.S. National Oceanic and Atmospheric Administration. The workshop was hosted by the Secretariat of the Pacific Regional Environment Programme (SPREP).
Live-capture, holding in captivity and export of Indo-Pacific bottlenose dolphins from the Solomon Islands began in 2003. These activities stimulated global interest and generated concern about the potential conservation implications. The IUCN Global Plan of Action for the Conservation of Cetaceans had stated that as a general principle, small cetaceans should not be captured or removed from a wild population unless that specific population has been assessed and shown capable of sustaining the removals. A principal goal of the present workshop was to elaborate on the elements of an assessment that would meet this standard. Participants noted that an assessment involving delineation of stock boundaries, abundance, reproductive potential, mortality and trend cannot necessarily be achieved quickly or inexpensively.
Specific topics covered by the workshop included management goals and assessment options, general biology and life history of bottlenose dolphins, forms of direct removal of dolphins from the wild, other threat factors, defining units to conserve, methods for estimating population size and assessment algorithms (e.g. population viability analysis). A framework for assessment was outlined, suggestions for genetic sampling and analyses were developed, and cultural and other local considerations for researchers working in the Pacific Islands region were summarised.
There is a need to determine the conservation status of Indo-Pacific bottlenose dolphin populations around islands where human-caused mortality or removal (direct or incidental catch) is known to be occurring. The species has a limited coastal range throughout much of the Indo-Pacific Ocean except in areas with wide continental shelves. Its near-shore distribution makes it particularly vulnerable to exploitation and other anthropogenic threats. In some regions where these dolphins have been studied, the populations have been found to be small compared to nearby open-ocean populations of common bottlenose dolphins (T. truncatus) and other species. The only known large concentrations (> ca. 1,000) are in regions with large shallow-water areas, e.g. Shark Bay on the western coast of Australia, North Stradbroke Island on the eastern coast of Australia and the Arabian Gulf. Given the restricted areas of potentially suitable habitat, populations of T. aduncus in the South Pacific islands are likely small, i.e. in the hundreds.
The government of the Solomon Islands had issued a permit for export of up to 80 dolphins per year (CITES Secretariat document AC 23 Doc.8.5) and it was reported at the workshop that the annual allowable export level was being increased to 100 dolphins of any species, but most likely to be only T. aduncus. If an international standard rule allowing 1% or 2% of a population to be removed annually (per IWC, ASCOBANS etc.) were applied in this instance, the local T. aduncus population would have to be at least 5,000 or 10,000 to sustain the permitted level of exports.
Based on the current state of knowledge of Indo-Pacific bottlenose dolphins throughout their range, as well as the information on this species in the Solomon Islands reviewed at the workshop, abundance in the area of recent live-captures appears to be well below 5,000. By the time of the workshop, an ongoing photo-identification study around Guadalcanal Island had catalogued only somewhat more than 100 individuals. Population assessment efforts need to be expanded if live-capture activities are to continue. It was concluded that the best approach to assess abundance and delineate populations would be a combination of mark-recapture analyses of photo-identification data and genetic analyses of tissue samples. It is assumed that Indo-Pacific bottlenose dolphins are not taken in the drive hunt in the Solomon Islands, but if they are, then both types of removal – live-capture and hunting – would need to be considered in any assessment of population status.
Live-capture, holding in captivity and export of Indo-Pacific bottlenose dolphins from the Solomon Islands began in 2003. These activities stimulated global interest and generated concern about the potential conservation implications. The IUCN Global Plan of Action for the Conservation of Cetaceans had stated that as a general principle, small cetaceans should not be captured or removed from a wild population unless that specific population has been assessed and shown capable of sustaining the removals. A principal goal of the present workshop was to elaborate on the elements of an assessment that would meet this standard. Participants noted that an assessment involving delineation of stock boundaries, abundance, reproductive potential, mortality and trend cannot necessarily be achieved quickly or inexpensively.
Specific topics covered by the workshop included management goals and assessment options, general biology and life history of bottlenose dolphins, forms of direct removal of dolphins from the wild, other threat factors, defining units to conserve, methods for estimating population size and assessment algorithms (e.g. population viability analysis). A framework for assessment was outlined, suggestions for genetic sampling and analyses were developed, and cultural and other local considerations for researchers working in the Pacific Islands region were summarised.
There is a need to determine the conservation status of Indo-Pacific bottlenose dolphin populations around islands where human-caused mortality or removal (direct or incidental catch) is known to be occurring. The species has a limited coastal range throughout much of the Indo-Pacific Ocean except in areas with wide continental shelves. Its near-shore distribution makes it particularly vulnerable to exploitation and other anthropogenic threats. In some regions where these dolphins have been studied, the populations have been found to be small compared to nearby open-ocean populations of common bottlenose dolphins (T. truncatus) and other species. The only known large concentrations (> ca. 1,000) are in regions with large shallow-water areas, e.g. Shark Bay on the western coast of Australia, North Stradbroke Island on the eastern coast of Australia and the Arabian Gulf. Given the restricted areas of potentially suitable habitat, populations of T. aduncus in the South Pacific islands are likely small, i.e. in the hundreds.
The government of the Solomon Islands had issued a permit for export of up to 80 dolphins per year (CITES Secretariat document AC 23 Doc.8.5) and it was reported at the workshop that the annual allowable export level was being increased to 100 dolphins of any species, but most likely to be only T. aduncus. If an international standard rule allowing 1% or 2% of a population to be removed annually (per IWC, ASCOBANS etc.) were applied in this instance, the local T. aduncus population would have to be at least 5,000 or 10,000 to sustain the permitted level of exports.
Based on the current state of knowledge of Indo-Pacific bottlenose dolphins throughout their range, as well as the information on this species in the Solomon Islands reviewed at the workshop, abundance in the area of recent live-captures appears to be well below 5,000. By the time of the workshop, an ongoing photo-identification study around Guadalcanal Island had catalogued only somewhat more than 100 individuals. Population assessment efforts need to be expanded if live-capture activities are to continue. It was concluded that the best approach to assess abundance and delineate populations would be a combination of mark-recapture analyses of photo-identification data and genetic analyses of tissue samples. It is assumed that Indo-Pacific bottlenose dolphins are not taken in the drive hunt in the Solomon Islands, but if they are, then both types of removal – live-capture and hunting – would need to be considered in any assessment of population status.
Jayasankar, P.,Anoop, B.,Vivekanandan, E.,Rajagopalan, M.,Yousuf, K.M.M.,Reynolds, P.,Krishnakumar, P.K.,Kumaran, PL.,Afsal, V.V.,Krishnan, A.A.
Molecular identification of delphinids and finless porpoise (Cetacea) from the Arabian Sea and Bay of Bengal Journal Article
In: Zootaxa, vol. 1853, no. 125, pp. 57-67, 2008.
Abstract | BibTeX | Tags: bottlenose dolphin, Common dolphin, D.capensis, DNA, Finless Porpoise, India, Neophocaena phocaenoides, sousa, species identification, Spinner dolphin, Stenella longirostris, taxonomy, tursiops aduncus
@article{,
title = {Molecular identification of delphinids and finless porpoise (Cetacea) from the Arabian Sea and Bay of Bengal},
author = {Jayasankar, P.,Anoop, B.,Vivekanandan, E.,Rajagopalan, M.,Yousuf, K.M.M.,Reynolds, P.,Krishnakumar, P.K.,Kumaran, PL.,Afsal, V.V.,Krishnan, A.A.},
year = {2008},
date = {2008-01-01},
journal = {Zootaxa},
volume = {1853},
number = {125},
pages = {57-67},
abstract = {The exact number of extant delphinid species from seas around India is still debated and the lack of adequate field keys
and reliable inventory has resulted in misidentification of several species. As a part of a project to develop a molecular
taxonomy of cetaceans from this region, partial sequences of mtDNA cytochrome b were generated from accidentally
caught/stranded delphinids and finless porpoise. Species were identified by phylogenetic reconstruction of sample
sequences with the reference sequences available in portals GenBank (NCBI) and the web-based program DNA Surveillance.
A comparison was made with the homologous sequences of corresponding species from other seas of the world.
Our molecular investigations allowed us to identify five species of cetaceans from Indian coasts, including Delphinus
capensis, previously reported as D. delphis. We detected unique haplotypes in Indo pacific humpbacked dolphin (Sousa
chinensis; n = 2) and finless porpoise (Neophocaena phocaenoides; n = 12) from Indian coast. On the other hand, some
haplotypes were shared with other regional populations in spinner dolphin (Stenella longirostris; n = 16) and bottlenose
dolphin (Tursiops aduncus; n = 3). Common dolphins (Delphinus capensis; n = 2) had both unique and shared haplotypes
including one highly divergent sequence.},
keywords = {bottlenose dolphin, Common dolphin, D.capensis, DNA, Finless Porpoise, India, Neophocaena phocaenoides, sousa, species identification, Spinner dolphin, Stenella longirostris, taxonomy, tursiops aduncus},
pubstate = {published},
tppubtype = {article}
}
The exact number of extant delphinid species from seas around India is still debated and the lack of adequate field keys
and reliable inventory has resulted in misidentification of several species. As a part of a project to develop a molecular
taxonomy of cetaceans from this region, partial sequences of mtDNA cytochrome b were generated from accidentally
caught/stranded delphinids and finless porpoise. Species were identified by phylogenetic reconstruction of sample
sequences with the reference sequences available in portals GenBank (NCBI) and the web-based program DNA Surveillance.
A comparison was made with the homologous sequences of corresponding species from other seas of the world.
Our molecular investigations allowed us to identify five species of cetaceans from Indian coasts, including Delphinus
capensis, previously reported as D. delphis. We detected unique haplotypes in Indo pacific humpbacked dolphin (Sousa
chinensis; n = 2) and finless porpoise (Neophocaena phocaenoides; n = 12) from Indian coast. On the other hand, some
haplotypes were shared with other regional populations in spinner dolphin (Stenella longirostris; n = 16) and bottlenose
dolphin (Tursiops aduncus; n = 3). Common dolphins (Delphinus capensis; n = 2) had both unique and shared haplotypes
including one highly divergent sequence.
and reliable inventory has resulted in misidentification of several species. As a part of a project to develop a molecular
taxonomy of cetaceans from this region, partial sequences of mtDNA cytochrome b were generated from accidentally
caught/stranded delphinids and finless porpoise. Species were identified by phylogenetic reconstruction of sample
sequences with the reference sequences available in portals GenBank (NCBI) and the web-based program DNA Surveillance.
A comparison was made with the homologous sequences of corresponding species from other seas of the world.
Our molecular investigations allowed us to identify five species of cetaceans from Indian coasts, including Delphinus
capensis, previously reported as D. delphis. We detected unique haplotypes in Indo pacific humpbacked dolphin (Sousa
chinensis; n = 2) and finless porpoise (Neophocaena phocaenoides; n = 12) from Indian coast. On the other hand, some
haplotypes were shared with other regional populations in spinner dolphin (Stenella longirostris; n = 16) and bottlenose
dolphin (Tursiops aduncus; n = 3). Common dolphins (Delphinus capensis; n = 2) had both unique and shared haplotypes
including one highly divergent sequence.
Ponnampalam,L.,Collins,T.J.Q.,Minton,G.,Baldwin,R
Feeding ecology of small cetaceans in the Sultanate of Oman Journal Article
In: Poster presented at the 17th meeting of the Society for Marine Mammals in Cape Town, no. 433, 2007.
Abstract | BibTeX | Tags: bottlenose dolphin, bottlenose dolphins, cephalopod, cetacean, cetaceans, conservation, diet, Distribution, dolphin, dolphins, ecology, feeding, feeding ecology, fish, habitat, humpback dolphins, occurrence, Oman, prey, Spinner dolphin, Stenella longirostris, stomach contents, survey, tursiops
@article{,
title = {Feeding ecology of small cetaceans in the Sultanate of Oman},
author = {Ponnampalam,L.,Collins,T.J.Q.,Minton,G.,Baldwin,R},
year = {2007},
date = {2007-01-01},
journal = {Poster presented at the 17th meeting of the Society for Marine Mammals in Cape Town},
number = {433},
abstract = {Beach surveys were conducted along the coast of Oman between 2000 and 2006 to locate and examine cetacean remains. This study examines the stomach contents of 11 bottlenose dolphins (Tursiops sp.), 5 Indo-Pacific humpback dolphins (Sousa chinensis) and 2 spinner dolphins (Stenella longirostris) that were found beach-cast along the Omani coastline. Across the three species examined, a total of 4796 fish otoliths and 214 cephalopod beaks were found, representing 36 species in 23 families. No crustacean remains were found. Prey item importance was calculated using the percentage by number (%N), and percentage by frequency of occurrence (%FO) methods, and a modified index of relative importance (IRI). Percentage similarity was also calculated to examine interspecific and intraspecific dietary overlap. All three species of dolphins examined here ate mainly fish. The fish families Apogonidae and Carangidae were the most numerically important prey in the diet of bottlenose dolphins. Sciaenidae was the most numerically important fish family for humpback dolphins. Mesopelagic fishes comprised the diet of spinner dolphins, with the myctophid Benthosema pterotum forming the bulk of the prey items. The cephalopod preys found in the stomach samples were represented by the families Sepiidae, Loliginidae and Onychoteuthidae. The frequency distribution of prey items indicate that the bottlenose dolphins fed in a wide variety of habitats, and may reflect the occurrence of at least two species or ecotypes of Tursiops in Oman. The humpback dolphin prey items indicate feeding in coastal, nearshore areas with soft substrate. Spinner dolphins appeared to feed in the upper 200m of the water column on nocturnal vertically migrating prey. Although most of the prey species do not appear to be of commercial importance, the findings of this study indicated that all three species of dolphins were feeding in areas where fishing occurs and this is likely to have conservation implications. },
keywords = {bottlenose dolphin, bottlenose dolphins, cephalopod, cetacean, cetaceans, conservation, diet, Distribution, dolphin, dolphins, ecology, feeding, feeding ecology, fish, habitat, humpback dolphins, occurrence, Oman, prey, Spinner dolphin, Stenella longirostris, stomach contents, survey, tursiops},
pubstate = {published},
tppubtype = {article}
}
Beach surveys were conducted along the coast of Oman between 2000 and 2006 to locate and examine cetacean remains. This study examines the stomach contents of 11 bottlenose dolphins (Tursiops sp.), 5 Indo-Pacific humpback dolphins (Sousa chinensis) and 2 spinner dolphins (Stenella longirostris) that were found beach-cast along the Omani coastline. Across the three species examined, a total of 4796 fish otoliths and 214 cephalopod beaks were found, representing 36 species in 23 families. No crustacean remains were found. Prey item importance was calculated using the percentage by number (%N), and percentage by frequency of occurrence (%FO) methods, and a modified index of relative importance (IRI). Percentage similarity was also calculated to examine interspecific and intraspecific dietary overlap. All three species of dolphins examined here ate mainly fish. The fish families Apogonidae and Carangidae were the most numerically important prey in the diet of bottlenose dolphins. Sciaenidae was the most numerically important fish family for humpback dolphins. Mesopelagic fishes comprised the diet of spinner dolphins, with the myctophid Benthosema pterotum forming the bulk of the prey items. The cephalopod preys found in the stomach samples were represented by the families Sepiidae, Loliginidae and Onychoteuthidae. The frequency distribution of prey items indicate that the bottlenose dolphins fed in a wide variety of habitats, and may reflect the occurrence of at least two species or ecotypes of Tursiops in Oman. The humpback dolphin prey items indicate feeding in coastal, nearshore areas with soft substrate. Spinner dolphins appeared to feed in the upper 200m of the water column on nocturnal vertically migrating prey. Although most of the prey species do not appear to be of commercial importance, the findings of this study indicated that all three species of dolphins were feeding in areas where fishing occurs and this is likely to have conservation implications.
Dudzinkski,K.M.,Frohoff,T.G.,Spradlin,T.R.
Wild Dolphin Swim Program Workshop Technical Report
no. 361, 1999.
Abstract | BibTeX | Tags: Australia, behaviour, bottlenose dolphin, bottlenose dolphins, Brazil, Hawaii, Japan, management, Spinner dolphin, swim with dolphins, Whale watching
@techreport{,
title = {Wild Dolphin Swim Program Workshop},
author = {Dudzinkski,K.M.,Frohoff,T.G.,Spradlin,T.R.},
year = {1999},
date = {1999-01-01},
journal = {Workshop held in conjunction with the 13th Biennial Conference on the Biology of Marine Mammals},
number = {361},
pages = {1-72},
abstract = {The workshop addressed many issues related to swimming with wild dolphins and the report includes abstracts/summaries of presentations on the following subjects: Interactions between the public and wild dolphins in the United States: Biological Concerns and the Marine Mammal Protection Act; Interactions between humans and bottlenose dolphins near Panama City, FLConcerns about Hawaiian spinner dolphins in HawaiiManagement Policies in New Zealand regarding wild dolphin swim programmesManagement of commercial swim with dolphin programmes in AustraliaMinimizing Impact and maximizing research during human dolphin interactions in the BahamasVessel and human impact monitoring of the dolphins of Little Bahamas BankWhale and Dolphin watching and associated research programs in the Ogasawara Islands, Japanan Example Approach the dolphin swimming/watching programs around Mikura Island, JapanIncomplete history of spinner dolphin research in HawaiiThe Hawaiian spinner dolphin, Stenella longirostris: effects of tourismSwimming with wild dolphins in New Zealand: a multispecies research exampleLearning dolphin "etiquette" by understanding their rules of behaviour and interactionConducting research on human-dolphin interactions: captive dolphins, free-ranging dolphins, solitary dolphins and dolphin groupsObservations of a lone sociable dolphin in BelizeApproaching wild dolphins in Brazil: potential risks in a near futureConsequences of swimming with a lone female bottlenose dolphin in the gulf of Eilat/AqabaStudying the human/dolphin interactions from a cliff-side in Kaikura, New ZealandBehavior and ecology of common dolphins and the impact of tourism in the Coromandel Bay of Plenty region, New ZealandResearch on Hawaiian Spinner dolphins in Kealakekua Bay, HawaiiA study of the Hawaiian spinner dolphins around OahuUnderwater research of dolphins in BelizeThe number of dolphin watching boats limited per day, according to a treaty about dolphin watching in Mikura Island watersBibliography of Human/Dolphin Interactions (19pp)},
keywords = {Australia, behaviour, bottlenose dolphin, bottlenose dolphins, Brazil, Hawaii, Japan, management, Spinner dolphin, swim with dolphins, Whale watching},
pubstate = {published},
tppubtype = {techreport}
}
The workshop addressed many issues related to swimming with wild dolphins and the report includes abstracts/summaries of presentations on the following subjects: Interactions between the public and wild dolphins in the United States: Biological Concerns and the Marine Mammal Protection Act; Interactions between humans and bottlenose dolphins near Panama City, FLConcerns about Hawaiian spinner dolphins in HawaiiManagement Policies in New Zealand regarding wild dolphin swim programmesManagement of commercial swim with dolphin programmes in AustraliaMinimizing Impact and maximizing research during human dolphin interactions in the BahamasVessel and human impact monitoring of the dolphins of Little Bahamas BankWhale and Dolphin watching and associated research programs in the Ogasawara Islands, Japanan Example Approach the dolphin swimming/watching programs around Mikura Island, JapanIncomplete history of spinner dolphin research in HawaiiThe Hawaiian spinner dolphin, Stenella longirostris: effects of tourismSwimming with wild dolphins in New Zealand: a multispecies research exampleLearning dolphin "etiquette" by understanding their rules of behaviour and interactionConducting research on human-dolphin interactions: captive dolphins, free-ranging dolphins, solitary dolphins and dolphin groupsObservations of a lone sociable dolphin in BelizeApproaching wild dolphins in Brazil: potential risks in a near futureConsequences of swimming with a lone female bottlenose dolphin in the gulf of Eilat/AqabaStudying the human/dolphin interactions from a cliff-side in Kaikura, New ZealandBehavior and ecology of common dolphins and the impact of tourism in the Coromandel Bay of Plenty region, New ZealandResearch on Hawaiian Spinner dolphins in Kealakekua Bay, HawaiiA study of the Hawaiian spinner dolphins around OahuUnderwater research of dolphins in BelizeThe number of dolphin watching boats limited per day, according to a treaty about dolphin watching in Mikura Island watersBibliography of Human/Dolphin Interactions (19pp)
Khani,A.M.Q.
Sea Dolphins of Pakistan Journal Article
In: Biopsphere Quarterly Magazine, vol. Oct-Dec, no. 132, pp. 4-9, 1998.
Abstract | BibTeX | Tags: Arabian Sea, bottlenose dolphin, Common dolphin, conservation, humpback dolphins, Indian Ocean, Pakistan
@article{,
title = {Sea Dolphins of Pakistan},
author = {Khani,A.M.Q.},
year = {1998},
date = {1998-01-01},
journal = {Biopsphere Quarterly Magazine},
volume = {Oct-Dec},
number = {132},
pages = {4-9},
abstract = {The article describes some of the results of a privately funded (amateur enthusiasts?) survey for dolphins on the Pakistan coastline in 1997. Motorized boats and aircraft were used. Descriptions of encounters with bottlenose, common, and humpback dolphins are described. No details of effort or encounter rate are provided. There is some discussion of potential threats and conservation concerns.},
keywords = {Arabian Sea, bottlenose dolphin, Common dolphin, conservation, humpback dolphins, Indian Ocean, Pakistan},
pubstate = {published},
tppubtype = {article}
}
The article describes some of the results of a privately funded (amateur enthusiasts?) survey for dolphins on the Pakistan coastline in 1997. Motorized boats and aircraft were used. Descriptions of encounters with bottlenose, common, and humpback dolphins are described. No details of effort or encounter rate are provided. There is some discussion of potential threats and conservation concerns.
Gallagher,M.D.
Collection of skulls of cetacea: Odondoceti from Bahrain, United Arab Emirates and Oman, 1969 - 1990 Book
UNEP, 1991.
Abstract | BibTeX | Tags: bottlenose dolphin, cetacea, cetacean, cetaceans, Common dolphin, Cuvier's beaked whale, dwarf sperm whale, false killer whale, fishing gear, hump-backed dolphin, incidental capture, Indian Ocean, marine, marine mammal, mass mortality, morphology/anatomy, mortality, Oman, Risso's dolphin, sanctuaries, skull, skulls, sperm whale, Spinner dolphin, spotted dolphin, Strandings, Striped dolphin, tropical dolphin, United Arab Emirates
@book{,
title = {Collection of skulls of cetacea: Odondoceti from Bahrain, United Arab Emirates and Oman, 1969 - 1990},
author = {Gallagher,M.D.},
year = {1991},
date = {1991-01-01},
journal = {Cetaceans and Cetacean Research in the Indian Ocean Sanctuary: Marine Mammal Technical Report Number 3},
number = {375},
pages = {89-97},
publisher = {UNEP},
abstract = {This paper details the collections of odontocete cetacean skulls from Bahrain, the United Arab Emirates and Oman, 1969-90. Causes of death of specimens are unknown but the likelihood of natural strandings, incidental capture in fishing gear and mass mortality are discussed.},
keywords = {bottlenose dolphin, cetacea, cetacean, cetaceans, Common dolphin, Cuvier's beaked whale, dwarf sperm whale, false killer whale, fishing gear, hump-backed dolphin, incidental capture, Indian Ocean, marine, marine mammal, mass mortality, morphology/anatomy, mortality, Oman, Risso's dolphin, sanctuaries, skull, skulls, sperm whale, Spinner dolphin, spotted dolphin, Strandings, Striped dolphin, tropical dolphin, United Arab Emirates},
pubstate = {published},
tppubtype = {book}
}
This paper details the collections of odontocete cetacean skulls from Bahrain, the United Arab Emirates and Oman, 1969-90. Causes of death of specimens are unknown but the likelihood of natural strandings, incidental capture in fishing gear and mass mortality are discussed.
Small,J.A..,Small,G.J.
Cetacean observations from the Somali Democratic Republic, September 1985 through May 1987 Journal Article
In: CEtaceans and Cetacean Research in the Indian Ocean Sanctuary: UNEP - Marine Mammal Technical Report No.3, no. 476, pp. 179-210, 1991.
Abstract | BibTeX | Tags: Antarctic, Blue whale, bottlenose dolphin, Bryde's whale, cetacean, cetaceans, Common dolphin, dolphin, false killer whale, Gulf of Aden, Humpback Whale, humpback whales, Indian Ocean, killer whale, location, marine, megaptera novaeangliae, melon-headed whale, migration, occurrence, Oman, Pacific Ocean, Risso's dolphin, sanctuaries, Southern Hemisphere, sperm whale, Spinner dolphin, spotted dolphin, stocks, Striped dolphin, survey, trend, Upwelling, whale, whales, whaling
@article{,
title = {Cetacean observations from the Somali Democratic Republic, September 1985 through May 1987},
author = {Small,J.A..,Small,G.J.},
year = {1991},
date = {1991-01-01},
journal = {CEtaceans and Cetacean Research in the Indian Ocean Sanctuary: UNEP - Marine Mammal Technical Report No.3},
number = {476},
pages = {179-210},
abstract = {Two vessels operated along the Gulf of Aden and northern Indian Ocean coasts of Somalia from Aug. 1985 through May 1987. Their fishing activities carried them on a routine basis from Djibouti to the Horn of Africa and, on many cruises, into the Indian Ocean as far south as 8øN. The frequent and regular presence of these vessels afforded a unique opportunity for research since few previous surveys along the Somalian coast were transitory and/or of short duration. There were 398 sightings of cetaceans representing at least 14 species: blue whale, Bryde's whale, sperm whale, melon-headed whale, false killer whale, killer whale, short-finned pilot whale, Indo-Pacific humpback dolphin, common dolphin, bottlenose dolphin, Risso's dolphin, spotted dolphin, striped dolphin and spinner dolphin (NO humpback whales!!). Sightings locations and related environmental data are discussed. Some trends between years were seen in the occurrence and location of blue, killer and short-finned pilot whales.},
keywords = {Antarctic, Blue whale, bottlenose dolphin, Bryde's whale, cetacean, cetaceans, Common dolphin, dolphin, false killer whale, Gulf of Aden, Humpback Whale, humpback whales, Indian Ocean, killer whale, location, marine, megaptera novaeangliae, melon-headed whale, migration, occurrence, Oman, Pacific Ocean, Risso's dolphin, sanctuaries, Southern Hemisphere, sperm whale, Spinner dolphin, spotted dolphin, stocks, Striped dolphin, survey, trend, Upwelling, whale, whales, whaling},
pubstate = {published},
tppubtype = {article}
}
Two vessels operated along the Gulf of Aden and northern Indian Ocean coasts of Somalia from Aug. 1985 through May 1987. Their fishing activities carried them on a routine basis from Djibouti to the Horn of Africa and, on many cruises, into the Indian Ocean as far south as 8øN. The frequent and regular presence of these vessels afforded a unique opportunity for research since few previous surveys along the Somalian coast were transitory and/or of short duration. There were 398 sightings of cetaceans representing at least 14 species: blue whale, Bryde's whale, sperm whale, melon-headed whale, false killer whale, killer whale, short-finned pilot whale, Indo-Pacific humpback dolphin, common dolphin, bottlenose dolphin, Risso's dolphin, spotted dolphin, striped dolphin and spinner dolphin (NO humpback whales!!). Sightings locations and related environmental data are discussed. Some trends between years were seen in the occurrence and location of blue, killer and short-finned pilot whales.
Rommel,S.
Osteology of the bottlenose dolphin Journal Article
In: Academic Press, Inc?, no. 456, pp. 29 -49, 1990.
Abstract | BibTeX | Tags: bottlenose dolphin, dolphin, dolphins, osteology, stranded, tursiops truncatus
@article{,
title = {Osteology of the bottlenose dolphin },
author = {Rommel,S.},
year = {1990},
date = {1990-01-01},
journal = {Academic Press, Inc?},
number = {456},
pages = {29 -49},
abstract = {This chapter describes some features of the skeleton of the bottlenose dolphin, Tursiops truncatus. The terminology I use generally follows that of Flower (1867, 1885). I have described the osteological features by examining specimens in the collection of the United States National Museum (USNM) (Table 1). Additional specimens were examined to verify controversial or questionable features. Most of the specimens were dolphins that stranded along the coasts of North Carolina and Virginia (see Mead and Potter, Chapter 9, this volume). In the figures, specific bone names are capitalized; other features are in lower case. In the text, specific bone names are in boldface type (e.g., orbitosphenoid); commonly used alternate names are in parentheses. Distinct features of the skull that are self-explanatory (e.g., postorbital process of the frontal) are not described in the text unless clarification is required. Cranial nerves and digits are referred to by Roman numerals.},
keywords = {bottlenose dolphin, dolphin, dolphins, osteology, stranded, tursiops truncatus},
pubstate = {published},
tppubtype = {article}
}
This chapter describes some features of the skeleton of the bottlenose dolphin, Tursiops truncatus. The terminology I use generally follows that of Flower (1867, 1885). I have described the osteological features by examining specimens in the collection of the United States National Museum (USNM) (Table 1). Additional specimens were examined to verify controversial or questionable features. Most of the specimens were dolphins that stranded along the coasts of North Carolina and Virginia (see Mead and Potter, Chapter 9, this volume). In the figures, specific bone names are capitalized; other features are in lower case. In the text, specific bone names are in boldface type (e.g., orbitosphenoid); commonly used alternate names are in parentheses. Distinct features of the skull that are self-explanatory (e.g., postorbital process of the frontal) are not described in the text unless clarification is required. Cranial nerves and digits are referred to by Roman numerals.
Lal Mohan,R.S.
Osteology of dolphins Journal Article
In: Proc. Symp. Endangered Mairne Animals and Marine Parks, vol. 1, no. 140, pp. 93-99, 1985.
Abstract | BibTeX | Tags: Arabian Sea, bottlenose dolphin, Common dolphin, gillnet, humpback dolphins, India, Indian Ocean, skull, Spinner dolphin
@article{,
title = {Osteology of dolphins},
author = {Lal Mohan,R.S.},
year = {1985},
date = {1985-01-01},
journal = {Proc. Symp. Endangered Mairne Animals and Marine Parks},
volume = {1},
number = {140},
pages = {93-99},
abstract = {Osteology of four dolphins (Common, Spinner, Bottlenose and Humpback) are studied from the south-west coast of India. The measurements of the skulls are compared with information available from other parts of the world. Specimens were obtained from bycatch in gillnets off the Calicut coast.},
keywords = {Arabian Sea, bottlenose dolphin, Common dolphin, gillnet, humpback dolphins, India, Indian Ocean, skull, Spinner dolphin},
pubstate = {published},
tppubtype = {article}
}
Osteology of four dolphins (Common, Spinner, Bottlenose and Humpback) are studied from the south-west coast of India. The measurements of the skulls are compared with information available from other parts of the world. Specimens were obtained from bycatch in gillnets off the Calicut coast.