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}
}
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.
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.
Kershaw, Francine,Carvalho, Inês,Loo, Jacqueline,Pomilla, Cristina,Best, Peter B.,Findlay, Ken P.,Cerchio, Salvatore,Collins, Tim,Engel, Marcia H.,Minton, Gianna,Ersts, Peter,Barendse, Jaco,Kotze, P. G. H.,Razafindrakoto, Yvette,Ngouessono, Solange,Meÿer, Michael,Thorton, Meredith,Rosenbaum, Howard C.
Multiple processes drive genetic structure of humpback whale ( Journal Article
In: Molecular Ecology, no. 131, pp. n/a-n/a, 2017, ISBN: 1365-294X.
Abstract | Links | BibTeX | Tags: behaviour, Humpback Whale, International Whaling Commission, megaptera novaeangliae, population assessment, population genetics, population identity, population structure, Southern Hemisphere, wildlife management
@article{,
title = {Multiple processes drive genetic structure of humpback whale (},
author = {Kershaw, Francine,Carvalho, Inês,Loo, Jacqueline,Pomilla, Cristina,Best, Peter B.,Findlay, Ken P.,Cerchio, Salvatore,Collins, Tim,Engel, Marcia H.,Minton, Gianna,Ersts, Peter,Barendse, Jaco,Kotze, P. G. H.,Razafindrakoto, Yvette,Ngouessono, Solange,Meÿer, Michael,Thorton, Meredith,Rosenbaum, Howard C.},
url = {http://dx.doi.org/10.1111/mec.13943},
issn = {1365-294X},
year = {2017},
date = {2017-01-01},
journal = {Molecular Ecology},
number = {131},
pages = {n/a-n/a},
abstract = {Elucidating patterns of population structure for species with complex life histories, and disentangling the processes driving such patterns, remains a significant analytical challenge. Humpback whale (Megaptera novaeangliae) populations display complex genetic structures that have not been fully resolved at all spatial scales. We generated a data set of nuclear markers for 3575 samples spanning the seven breeding stocks and substocks found in the South Atlantic and western and northern Indian Oceans. For the total sample, and males and females separately, we assessed genetic diversity, tested for genetic differentiation between putative populations and isolation by distance, estimated the number of genetic clusters without a priori population information and estimated rates of gene flow using maximum-likelihood and Bayesian approaches. At the ocean basin scale, structure is governed by geographical distance (IBD P < 0.05) and female fidelity to breeding areas, in line with current understanding of the drivers of broadscale population structure. Consistent with previous studies, the Arabian Sea breeding stock was highly genetically differentiated (FST 0.034–0.161; P < 0.01 for all comparisons). However, the breeding stock boundary between west South Africa and east Africa was more porous than expected based on genetic differentiation, cluster and geneflow analyses. Instances of male fidelity to breeding areas and relatively high rates of dispersal for females were also observed between the three substocks in the western Indian Ocean. The relationships between demographic units and current management boundaries may have ramifications for assessments of the status and continued protections of populations still in recovery from commercial whaling.},
keywords = {behaviour, Humpback Whale, International Whaling Commission, megaptera novaeangliae, population assessment, population genetics, population identity, population structure, Southern Hemisphere, wildlife management},
pubstate = {published},
tppubtype = {article}
}
Elucidating patterns of population structure for species with complex life histories, and disentangling the processes driving such patterns, remains a significant analytical challenge. Humpback whale (Megaptera novaeangliae) populations display complex genetic structures that have not been fully resolved at all spatial scales. We generated a data set of nuclear markers for 3575 samples spanning the seven breeding stocks and substocks found in the South Atlantic and western and northern Indian Oceans. For the total sample, and males and females separately, we assessed genetic diversity, tested for genetic differentiation between putative populations and isolation by distance, estimated the number of genetic clusters without a priori population information and estimated rates of gene flow using maximum-likelihood and Bayesian approaches. At the ocean basin scale, structure is governed by geographical distance (IBD P < 0.05) and female fidelity to breeding areas, in line with current understanding of the drivers of broadscale population structure. Consistent with previous studies, the Arabian Sea breeding stock was highly genetically differentiated (FST 0.034–0.161; P < 0.01 for all comparisons). However, the breeding stock boundary between west South Africa and east Africa was more porous than expected based on genetic differentiation, cluster and geneflow analyses. Instances of male fidelity to breeding areas and relatively high rates of dispersal for females were also observed between the three substocks in the western Indian Ocean. The relationships between demographic units and current management boundaries may have ramifications for assessments of the status and continued protections of populations still in recovery from commercial whaling.
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}
}
Rosenbaum,H.C.,Glaberman,S.,Jefferson,T.,Collins,T.,Minton,G.,Peddemors,V.,Baldwin,R.M.
Phylogenetic relationships and population structure among humpback dolphins based on mtDNA variation Technical Report
no. 459, 2002, ISBN: SC/54/SM34.
Abstract | BibTeX | Tags: control region, dolphin, dolphins, humpback dolphins, International Whaling Commission, mtDNA, Oman, Pacific Ocean, phylogenetic, population, population structure, South Africa, status, taxonomy, whaling
@techreport{,
title = {Phylogenetic relationships and population structure among humpback dolphins based on mtDNA variation},
author = {Rosenbaum,H.C.,Glaberman,S.,Jefferson,T.,Collins,T.,Minton,G.,Peddemors,V.,Baldwin,R.M.},
issn = {SC/54/SM34},
year = {2002},
date = {2002-01-01},
journal = {Document presented to the 54th meeting of the International Whaling Commission},
volume = {SC/54/SM34},
number = {459},
pages = {1-8},
abstract = {The taxonomy, systematic relationships, and population structure of humpback dolphins (genus Sousa) have been controversial. Various nominal species have been described or subsumed. Recent reports have suggested the division of Sousa into one to three distinct species or sub-species. However, many of these analyses have not been conducted in a proper systematics framework, did not include all representative putative taxa or were lacking specimens from parts of their geographic range, and have not been in published in peer-reviewed journals (typically necessary for revising taxonomy). In order to address relationships and taxonomic status among Sousa species, we present a preliminary genetic analysis of humpback dolphins primarily from Southeast Asia, the coast of Oman, and South Africa. A total of 110 samples were sequenced for 501 by of mtDNA control region and significant population structuring at the regional level was revealed. Population Aggregation and phylogenetic analyses of mtDNA control region lineages and a subset of lineages analyzed for a 358 by fragment of Cytochrome B revealed a series of complex relationships among humpback dolphins in the Indian and Pacific Oceans. These preliminary data are a critical first step to better understanding the taxonomy and systematics in the genus Sousa. Additional molecular character data from other mitochondria) and nuclear genes will be essential for resolving relationship and taxonomic status for humpback dolphins.},
keywords = {control region, dolphin, dolphins, humpback dolphins, International Whaling Commission, mtDNA, Oman, Pacific Ocean, phylogenetic, population, population structure, South Africa, status, taxonomy, whaling},
pubstate = {published},
tppubtype = {techreport}
}
The taxonomy, systematic relationships, and population structure of humpback dolphins (genus Sousa) have been controversial. Various nominal species have been described or subsumed. Recent reports have suggested the division of Sousa into one to three distinct species or sub-species. However, many of these analyses have not been conducted in a proper systematics framework, did not include all representative putative taxa or were lacking specimens from parts of their geographic range, and have not been in published in peer-reviewed journals (typically necessary for revising taxonomy). In order to address relationships and taxonomic status among Sousa species, we present a preliminary genetic analysis of humpback dolphins primarily from Southeast Asia, the coast of Oman, and South Africa. A total of 110 samples were sequenced for 501 by of mtDNA control region and significant population structuring at the regional level was revealed. Population Aggregation and phylogenetic analyses of mtDNA control region lineages and a subset of lineages analyzed for a 358 by fragment of Cytochrome B revealed a series of complex relationships among humpback dolphins in the Indian and Pacific Oceans. These preliminary data are a critical first step to better understanding the taxonomy and systematics in the genus Sousa. Additional molecular character data from other mitochondria) and nuclear genes will be essential for resolving relationship and taxonomic status for humpback dolphins.