Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population

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,...

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Autores principales:	Emmanuelle C. Leroy, Jean-Yves Royer, Abigail Alling, Ben Maslen, Tracey L. Rogers
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/01bc61092f114adc8e29ae8e9c8910b9
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spelling	oai:doaj.org-article:01bc61092f114adc8e29ae8e9c8910b92021-12-02T13:39:23ZMultiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population10.1038/s41598-021-88062-52045-2322https://doaj.org/article/01bc61092f114adc8e29ae8e9c8910b92021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88062-5https://doaj.org/toc/2045-2322Abstract 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.Emmanuelle C. LeroyJean-Yves RoyerAbigail AllingBen MaslenTracey L. RogersNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-21 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Emmanuelle C. Leroy Jean-Yves Royer Abigail Alling Ben Maslen Tracey L. Rogers Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population
description	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.
format	article
author	Emmanuelle C. Leroy Jean-Yves Royer Abigail Alling Ben Maslen Tracey L. Rogers
author_facet	Emmanuelle C. Leroy Jean-Yves Royer Abigail Alling Ben Maslen Tracey L. Rogers
author_sort	Emmanuelle C. Leroy
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	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/01bc61092f114adc8e29ae8e9c8910b9
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Multiple pygmy blue whale acoustic populations in the Indian Ocean: whale song identifies a possible new population

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