Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population
International audience Abstract Blue whales were brought to the edge of extinction by commercial whaling in the twentieth century and their recovery rate in the Southern Hemisphere has been slow; they remain endangered. Blue whales, although the largest animals on Earth, are difficult to study in th...
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Online Access: | https://hal.univ-brest.fr/hal-03319873 https://hal.univ-brest.fr/hal-03319873/document https://hal.univ-brest.fr/hal-03319873/file/s41598-021-88062-5.pdf https://doi.org/10.1038/s41598-021-88062-5 |
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ftunivbrest:oai:HAL:hal-03319873v1 2023-05-15T15:45:08+02:00 Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population Leroy, Emmanuelle Royer, Jean-Yves Alling, Abigail Maslen, Ben Rogers, Tracey Laboratoire Géosciences Océan (LGO) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2021-12 https://hal.univ-brest.fr/hal-03319873 https://hal.univ-brest.fr/hal-03319873/document https://hal.univ-brest.fr/hal-03319873/file/s41598-021-88062-5.pdf https://doi.org/10.1038/s41598-021-88062-5 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-021-88062-5 hal-03319873 https://hal.univ-brest.fr/hal-03319873 https://hal.univ-brest.fr/hal-03319873/document https://hal.univ-brest.fr/hal-03319873/file/s41598-021-88062-5.pdf doi:10.1038/s41598-021-88062-5 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.univ-brest.fr/hal-03319873 Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-88062-5⟩ [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftunivbrest https://doi.org/10.1038/s41598-021-88062-5 2023-02-14T23:44:13Z International audience Abstract Blue whales were brought to the edge of extinction by commercial whaling in the twentieth century and their recovery rate in the Southern Hemisphere has been slow; they remain endangered. Blue whales, although the largest animals on Earth, are difficult to study in the Southern Hemisphere, thus their population structure, distribution and migration remain poorly known. Fortunately, blue whales produce powerful and stereotyped songs, which prove an effective clue for monitoring their different ‘acoustic populations.’ The DGD-Chagos song has been previously reported in the central Indian Ocean. A comparison of this song with the pygmy blue and Omura’s whale songs shows that the Chagos song are likely produced by a distinct previously unknown pygmy blue whale population. These songs are a large part of the underwater soundscape in the tropical Indian Ocean and have been so for nearly two decades. Seasonal differences in song detections among our six recording sites suggest that the Chagos whales migrate from the eastern to western central Indian Ocean, around the Chagos Archipelago, then further east, up to the north of Western Australia, and possibly further north, as far as Sri Lanka. The Indian Ocean holds a greater diversity of blue whale populations than thought previously. Article in Journal/Newspaper Blue whale Université de Bretagne Occidentale: HAL Indian Scientific Reports 11 1 |
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Open Polar |
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Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDU]Sciences of the Universe [physics] Leroy, Emmanuelle Royer, Jean-Yves Alling, Abigail Maslen, Ben Rogers, Tracey Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
topic_facet |
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDU]Sciences of the Universe [physics] |
description |
International audience Abstract Blue whales were brought to the edge of extinction by commercial whaling in the twentieth century and their recovery rate in the Southern Hemisphere has been slow; they remain endangered. Blue whales, although the largest animals on Earth, are difficult to study in the Southern Hemisphere, thus their population structure, distribution and migration remain poorly known. Fortunately, blue whales produce powerful and stereotyped songs, which prove an effective clue for monitoring their different ‘acoustic populations.’ The DGD-Chagos song has been previously reported in the central Indian Ocean. A comparison of this song with the pygmy blue and Omura’s whale songs shows that the Chagos song are likely produced by a distinct previously unknown pygmy blue whale population. These songs are a large part of the underwater soundscape in the tropical Indian Ocean and have been so for nearly two decades. Seasonal differences in song detections among our six recording sites suggest that the Chagos whales migrate from the eastern to western central Indian Ocean, around the Chagos Archipelago, then further east, up to the north of Western Australia, and possibly further north, as far as Sri Lanka. The Indian Ocean holds a greater diversity of blue whale populations than thought previously. |
author2 |
Laboratoire Géosciences Océan (LGO) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Leroy, Emmanuelle Royer, Jean-Yves Alling, Abigail Maslen, Ben Rogers, Tracey |
author_facet |
Leroy, Emmanuelle Royer, Jean-Yves Alling, Abigail Maslen, Ben Rogers, Tracey |
author_sort |
Leroy, Emmanuelle |
title |
Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
title_short |
Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
title_full |
Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
title_fullStr |
Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
title_full_unstemmed |
Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
title_sort |
multiple pygmy blue whale acoustic populations in the indian ocean: whale song identifies a possible new population |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.univ-brest.fr/hal-03319873 https://hal.univ-brest.fr/hal-03319873/document https://hal.univ-brest.fr/hal-03319873/file/s41598-021-88062-5.pdf https://doi.org/10.1038/s41598-021-88062-5 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Blue whale |
genre_facet |
Blue whale |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.univ-brest.fr/hal-03319873 Scientific Reports, 2021, 11 (1), ⟨10.1038/s41598-021-88062-5⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-021-88062-5 hal-03319873 https://hal.univ-brest.fr/hal-03319873 https://hal.univ-brest.fr/hal-03319873/document https://hal.univ-brest.fr/hal-03319873/file/s41598-021-88062-5.pdf doi:10.1038/s41598-021-88062-5 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-021-88062-5 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766379492847124480 |