Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean.
International audience Understanding the seasonal movements and distribution patterns of migratory species over ocean basin scales is vital for appropriate conservation and management measures. However, assessing populations over remote regions is challenging, particularly if they are rare. Blue wha...
Published in: | PLoS ONE |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776/document https://hal-insu.archives-ouvertes.fr/insu-00855776/file/Plos-one-Samaran-2013.pdf https://doi.org/10.1371/journal.pone.0071561 |
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ftunivnantes:oai:HAL:insu-00855776v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Samaran, Flore Stafford, Kathleen M Branch, Trevor A Gedamke, Jason Royer, Jean-Yves Dziak, Robert P Guinet, Christophe Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Understanding the seasonal movements and distribution patterns of migratory species over ocean basin scales is vital for appropriate conservation and management measures. However, assessing populations over remote regions is challenging, particularly if they are rare. Blue whales (Balaenoptera musculus spp) are an endangered species found in the Southern and Indian Oceans. Here two recognized subspecies of blue whales and, based on passive acoustic monitoring, four "acoustic populations" occur. Three of these are pygmy blue whale (B.m. brevicauda) populations while the fourth is the Antarctic blue whale (B.m. intermedia). Past whaling catches have dramatically reduced their numbers but recent acoustic recordings show that these oceans are still important habitat for blue whales. Presently little is known about the seasonal movements and degree of overlap of these four populations, particularly in the central Indian Ocean. We examined the geographic and seasonal occurrence of different blue whale acoustic populations using one year of passive acoustic recording from three sites located at different latitudes in the Indian Ocean. The vocalizations of the different blue whale subspecies and acoustic populations were recorded seasonally in different regions. For some call types and locations, there was spatial and temporal overlap, particularly between Antarctic and different pygmy blue whale acoustic populations. Except on the southernmost hydrophone, all three pygmy blue whale acoustic populations were found at different sites or during different seasons, which further suggests that these populations are generally geographically distinct. This unusual blue whale diversity in sub-Antarctic and sub-tropical waters indicates the importance of the area for blue whales in these former whaling grounds. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Observatoire pour la Conservation de la Mégafaune Marine (PELAGIS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Applied Physics Laboratory Seattle (APL-UW) University of Washington Seattle School of Aquatic and Fishery Sciences NOAA Ocean Acoustics Program NOAA National Marine Fisheries Service (NMFS) National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) NOAA Pacific Marine Environmental Laboratory Newport (PMEL) National Oceanic and Atmospheric Administration (NOAA) |
format |
Article in Journal/Newspaper |
author |
Samaran, Flore Stafford, Kathleen M Branch, Trevor A Gedamke, Jason Royer, Jean-Yves Dziak, Robert P Guinet, Christophe |
author_facet |
Samaran, Flore Stafford, Kathleen M Branch, Trevor A Gedamke, Jason Royer, Jean-Yves Dziak, Robert P Guinet, Christophe |
author_sort |
Samaran, Flore |
title |
Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
title_short |
Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
title_full |
Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
title_fullStr |
Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
title_full_unstemmed |
Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. |
title_sort |
seasonal and geographic variation of southern blue whale subspecies in the indian ocean. |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776/document https://hal-insu.archives-ouvertes.fr/insu-00855776/file/Plos-one-Samaran-2013.pdf https://doi.org/10.1371/journal.pone.0071561 |
geographic |
Antarctic The Antarctic Indian |
geographic_facet |
Antarctic The Antarctic Indian |
genre |
Antarc* Antarctic Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Balaenoptera musculus Blue whale |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal-insu.archives-ouvertes.fr/insu-00855776 PLoS ONE, 2013, 8 (8), pp.e71561. ⟨10.1371/journal.pone.0071561⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0071561 info:eu-repo/semantics/altIdentifier/pmid/23967221 insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776/document https://hal-insu.archives-ouvertes.fr/insu-00855776/file/Plos-one-Samaran-2013.pdf doi:10.1371/journal.pone.0071561 PUBMED: 23967221 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0071561 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
8 |
container_start_page |
e71561 |
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1766252528913088512 |
spelling |
ftunivnantes:oai:HAL:insu-00855776v1 2023-05-15T13:49:56+02:00 Seasonal and geographic variation of southern blue whale subspecies in the Indian ocean. Samaran, Flore Stafford, Kathleen M Branch, Trevor A Gedamke, Jason Royer, Jean-Yves Dziak, Robert P Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Observatoire pour la Conservation de la Mégafaune Marine (PELAGIS) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Applied Physics Laboratory Seattle (APL-UW) University of Washington Seattle School of Aquatic and Fishery Sciences NOAA Ocean Acoustics Program NOAA National Marine Fisheries Service (NMFS) National Oceanic and Atmospheric Administration (NOAA)-National Oceanic and Atmospheric Administration (NOAA) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) NOAA Pacific Marine Environmental Laboratory Newport (PMEL) National Oceanic and Atmospheric Administration (NOAA) 2013 https://hal-insu.archives-ouvertes.fr/insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776/document https://hal-insu.archives-ouvertes.fr/insu-00855776/file/Plos-one-Samaran-2013.pdf https://doi.org/10.1371/journal.pone.0071561 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0071561 info:eu-repo/semantics/altIdentifier/pmid/23967221 insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776 https://hal-insu.archives-ouvertes.fr/insu-00855776/document https://hal-insu.archives-ouvertes.fr/insu-00855776/file/Plos-one-Samaran-2013.pdf doi:10.1371/journal.pone.0071561 PUBMED: 23967221 info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal-insu.archives-ouvertes.fr/insu-00855776 PLoS ONE, 2013, 8 (8), pp.e71561. ⟨10.1371/journal.pone.0071561⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.1371/journal.pone.0071561 2023-03-07T23:56:30Z International audience Understanding the seasonal movements and distribution patterns of migratory species over ocean basin scales is vital for appropriate conservation and management measures. However, assessing populations over remote regions is challenging, particularly if they are rare. Blue whales (Balaenoptera musculus spp) are an endangered species found in the Southern and Indian Oceans. Here two recognized subspecies of blue whales and, based on passive acoustic monitoring, four "acoustic populations" occur. Three of these are pygmy blue whale (B.m. brevicauda) populations while the fourth is the Antarctic blue whale (B.m. intermedia). Past whaling catches have dramatically reduced their numbers but recent acoustic recordings show that these oceans are still important habitat for blue whales. Presently little is known about the seasonal movements and degree of overlap of these four populations, particularly in the central Indian Ocean. We examined the geographic and seasonal occurrence of different blue whale acoustic populations using one year of passive acoustic recording from three sites located at different latitudes in the Indian Ocean. The vocalizations of the different blue whale subspecies and acoustic populations were recorded seasonally in different regions. For some call types and locations, there was spatial and temporal overlap, particularly between Antarctic and different pygmy blue whale acoustic populations. Except on the southernmost hydrophone, all three pygmy blue whale acoustic populations were found at different sites or during different seasons, which further suggests that these populations are generally geographically distinct. This unusual blue whale diversity in sub-Antarctic and sub-tropical waters indicates the importance of the area for blue whales in these former whaling grounds. Article in Journal/Newspaper Antarc* Antarctic Balaenoptera musculus Blue whale Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Indian PLoS ONE 8 8 e71561 |