Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean
International audience Monitoring the presence of blue whale (Balaenoptera musculus ssp.) stereotyped calls has been a widely used method to assess the different populations' distribution worldwide. All blue whale populations also produce nonstereotyped vocalizations, or D-calls. Here, we monit...
Published in: | Marine Mammal Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://ensta-bretagne.hal.science/hal-04023813 https://doi.org/10.1111/mms.12998 |
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ftccsdartic:oai:HAL:hal-04023813v1 2024-02-11T09:58:51+01:00 Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean Torterotot, Maëlle Samaran, Flore Royer, Jean‐yves École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne) Equipe Marine Mapping & Metrology (Lab-STICC_M3) Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC) École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT) Geo-Ocean (GEO-OCEAN) 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) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2023 https://ensta-bretagne.hal.science/hal-04023813 https://doi.org/10.1111/mms.12998 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/mms.12998 hal-04023813 https://ensta-bretagne.hal.science/hal-04023813 doi:10.1111/mms.12998 ISSN: 0824-0469 EISSN: 1748-7692 Marine Mammal Science https://ensta-bretagne.hal.science/hal-04023813 Marine Mammal Science, 2023, 39 (2), pp.594-610. ⟨10.1111/mms.12998⟩ Antarctic blue whale Balaenoptera musculus D-calls passive acoustic monitoring pygmy blue whale southern Indian Ocean [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftccsdartic https://doi.org/10.1111/mms.12998 2024-01-13T23:59:57Z International audience Monitoring the presence of blue whale (Balaenoptera musculus ssp.) stereotyped calls has been a widely used method to assess the different populations' distribution worldwide. All blue whale populations also produce nonstereotyped vocalizations, or D-calls. Here, we monitored the presence of D-calls in long-term records from a large hydrophone array located in the open southern Indian Ocean, using an automated detection method and manual validation of the detections. D-calls were detected at all sites of the array, which extends from 24°S to 56°S, but the majority of them were detected at the two southernmost sites. We observed a latitudinal shift in their seasonal occurrence, with more D-calls in the north during austral autumn and winter and more in the south during austral spring. The geographical occurrence of D-calls compared to that of songs indicates that blue whale acoustic behavior switches from a song-intensive and sparse-D-call emission in the north to song-moderate and more intensive D-call emissions in the south. These findings support the hypothesis that both call types are used for different purposes, as D-calls are mainly detected around foraging grounds and songs in wintering grounds. Monitoring both call types might therefore be a relevant acoustic indicator of blue whale behavior. Article in Journal/Newspaper Antarc* Antarctic Balaenoptera musculus Blue whale Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Indian Marine Mammal Science |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Antarctic blue whale Balaenoptera musculus D-calls passive acoustic monitoring pygmy blue whale southern Indian Ocean [SDU]Sciences of the Universe [physics] |
spellingShingle |
Antarctic blue whale Balaenoptera musculus D-calls passive acoustic monitoring pygmy blue whale southern Indian Ocean [SDU]Sciences of the Universe [physics] Torterotot, Maëlle Samaran, Flore Royer, Jean‐yves Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
topic_facet |
Antarctic blue whale Balaenoptera musculus D-calls passive acoustic monitoring pygmy blue whale southern Indian Ocean [SDU]Sciences of the Universe [physics] |
description |
International audience Monitoring the presence of blue whale (Balaenoptera musculus ssp.) stereotyped calls has been a widely used method to assess the different populations' distribution worldwide. All blue whale populations also produce nonstereotyped vocalizations, or D-calls. Here, we monitored the presence of D-calls in long-term records from a large hydrophone array located in the open southern Indian Ocean, using an automated detection method and manual validation of the detections. D-calls were detected at all sites of the array, which extends from 24°S to 56°S, but the majority of them were detected at the two southernmost sites. We observed a latitudinal shift in their seasonal occurrence, with more D-calls in the north during austral autumn and winter and more in the south during austral spring. The geographical occurrence of D-calls compared to that of songs indicates that blue whale acoustic behavior switches from a song-intensive and sparse-D-call emission in the north to song-moderate and more intensive D-call emissions in the south. These findings support the hypothesis that both call types are used for different purposes, as D-calls are mainly detected around foraging grounds and songs in wintering grounds. Monitoring both call types might therefore be a relevant acoustic indicator of blue whale behavior. |
author2 |
École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne) Equipe Marine Mapping & Metrology (Lab-STICC_M3) Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC) École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT) Geo-Ocean (GEO-OCEAN) 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) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Torterotot, Maëlle Samaran, Flore Royer, Jean‐yves |
author_facet |
Torterotot, Maëlle Samaran, Flore Royer, Jean‐yves |
author_sort |
Torterotot, Maëlle |
title |
Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
title_short |
Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
title_full |
Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
title_fullStr |
Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
title_full_unstemmed |
Long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern Indian Ocean |
title_sort |
long‐term acoustic monitoring of nonstereotyped blue whale calls in the southern indian ocean |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://ensta-bretagne.hal.science/hal-04023813 https://doi.org/10.1111/mms.12998 |
geographic |
Antarctic Austral Indian |
geographic_facet |
Antarctic Austral Indian |
genre |
Antarc* Antarctic Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Balaenoptera musculus Blue whale |
op_source |
ISSN: 0824-0469 EISSN: 1748-7692 Marine Mammal Science https://ensta-bretagne.hal.science/hal-04023813 Marine Mammal Science, 2023, 39 (2), pp.594-610. ⟨10.1111/mms.12998⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/mms.12998 hal-04023813 https://ensta-bretagne.hal.science/hal-04023813 doi:10.1111/mms.12998 |
op_doi |
https://doi.org/10.1111/mms.12998 |
container_title |
Marine Mammal Science |
_version_ |
1790594653187211264 |