Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population
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 thei...
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Springer Science and Business Media LLC
2021
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Online Access: | https://archimer.ifremer.fr/doc/00691/80280/83365.pdf https://doi.org/10.1038/s41598-021-88062-5 https://archimer.ifremer.fr/doc/00691/80280/ |
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ftarchimer:oai:archimer.ifremer.fr:80280 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 L. 2021-04 application/pdf https://archimer.ifremer.fr/doc/00691/80280/83365.pdf https://doi.org/10.1038/s41598-021-88062-5 https://archimer.ifremer.fr/doc/00691/80280/ eng eng Springer Science and Business Media LLC https://archimer.ifremer.fr/doc/00691/80280/83365.pdf doi:10.1038/s41598-021-88062-5 https://archimer.ifremer.fr/doc/00691/80280/ info:eu-repo/semantics/openAccess restricted use Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2021-04 , Vol. 11 , N. 1 , P. 8762 (21p.) text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1038/s41598-021-88062-5 2021-10-26T22:57:37Z 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Indian Scientific Reports 11 1 |
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Open Polar |
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Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Leroy, Emmanuelle Royer, Jean-yves Alling, Abigail Maslen, Ben Rogers, Tracey L. |
spellingShingle |
Leroy, Emmanuelle Royer, Jean-yves Alling, Abigail Maslen, Ben Rogers, Tracey L. Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population |
author_facet |
Leroy, Emmanuelle Royer, Jean-yves Alling, Abigail Maslen, Ben Rogers, Tracey L. |
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 |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00691/80280/83365.pdf https://doi.org/10.1038/s41598-021-88062-5 https://archimer.ifremer.fr/doc/00691/80280/ |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Blue whale |
genre_facet |
Blue whale |
op_source |
Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2021-04 , Vol. 11 , N. 1 , P. 8762 (21p.) |
op_relation |
https://archimer.ifremer.fr/doc/00691/80280/83365.pdf doi:10.1038/s41598-021-88062-5 https://archimer.ifremer.fr/doc/00691/80280/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41598-021-88062-5 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766379486396284928 |