Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence
International audience Since passive acoustic monitoring is widely used, unidentified acoustic signals from marine mammals are commonly reported. The signal characteristics and emission patterns are the main clues to identify the possible sources. In this study, the authors describe two previously u...
Published in: | The Journal of the Acoustical Society of America |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://hal.univ-brest.fr/hal-01902719 https://doi.org/10.1121/1.5001056 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
spellingShingle |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology Leroy, Emmanuelle Samaran, Flore Bonnel, Julien Royer, Jean-Yves Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
topic_facet |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
description |
International audience Since passive acoustic monitoring is widely used, unidentified acoustic signals from marine mammals are commonly reported. The signal characteristics and emission patterns are the main clues to identify the possible sources. In this study, the authors describe two previously unidentified sounds, recorded at up to five widely-spaced sites (30 × 30 degree area) in the southern Indian Ocean, in 2007 and between 2010 and 2015. The first reported signal (M-call) consists of a single tonal unit near 22 Hz and lasting about 10 s, repeated with an interval longer than 2 min. This signal is only detected in 2007. The second signal (P-call) is also a tonal unit of 10 s, repeated every 160 s, but at a frequency near 27 Hz. Its yearly number increased greatly between 2007 and 2010, and moderately since then. Based on their characteristics and seasonal patterns, this study shows that both signals are clearly distinct from any known calls of blue whale subspecies and populations dwelling in the southern Indian Ocean. However, they display similarities with blue whale vocalizations. More particularly, the P-call can be mistaken for the first tonal unit of the Antarctic blue whale Z-call. |
author2 |
Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 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) Lab-STICC_ENSTAB_CID_TOMS 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) 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) |
format |
Article in Journal/Newspaper |
author |
Leroy, Emmanuelle Samaran, Flore Bonnel, Julien Royer, Jean-Yves |
author_facet |
Leroy, Emmanuelle Samaran, Flore Bonnel, Julien Royer, Jean-Yves |
author_sort |
Leroy, Emmanuelle |
title |
Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
title_short |
Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
title_full |
Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
title_fullStr |
Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
title_full_unstemmed |
Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence |
title_sort |
identification of two potential whale calls in the southern indian ocean, and their geographic and seasonal occurrence |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.univ-brest.fr/hal-01902719 https://doi.org/10.1121/1.5001056 |
geographic |
Antarctic Indian The Antarctic |
geographic_facet |
Antarctic Indian The Antarctic |
genre |
Antarc* Antarctic Blue whale |
genre_facet |
Antarc* Antarctic Blue whale |
op_source |
ISSN: 0001-4966 EISSN: 1520-8524 Journal of the Acoustical Society of America https://hal.univ-brest.fr/hal-01902719 Journal of the Acoustical Society of America, 2017, 142 (3), pp.1413 - 1427. ⟨10.1121/1.5001056⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1121/1.5001056 hal-01902719 https://hal.univ-brest.fr/hal-01902719 doi:10.1121/1.5001056 |
op_doi |
https://doi.org/10.1121/1.5001056 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
142 |
container_issue |
3 |
container_start_page |
1413 |
op_container_end_page |
1427 |
_version_ |
1790593293054115840 |
spelling |
ftinsu:oai:HAL:hal-01902719v1 2024-02-11T09:57:45+01:00 Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence Leroy, Emmanuelle Samaran, Flore Bonnel, Julien Royer, Jean-Yves Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 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) Lab-STICC_ENSTAB_CID_TOMS 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) 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) 2017-09 https://hal.univ-brest.fr/hal-01902719 https://doi.org/10.1121/1.5001056 en eng HAL CCSD Acoustical Society of America info:eu-repo/semantics/altIdentifier/doi/10.1121/1.5001056 hal-01902719 https://hal.univ-brest.fr/hal-01902719 doi:10.1121/1.5001056 ISSN: 0001-4966 EISSN: 1520-8524 Journal of the Acoustical Society of America https://hal.univ-brest.fr/hal-01902719 Journal of the Acoustical Society of America, 2017, 142 (3), pp.1413 - 1427. ⟨10.1121/1.5001056⟩ [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology info:eu-repo/semantics/article Journal articles 2017 ftinsu https://doi.org/10.1121/1.5001056 2024-01-24T17:36:52Z International audience Since passive acoustic monitoring is widely used, unidentified acoustic signals from marine mammals are commonly reported. The signal characteristics and emission patterns are the main clues to identify the possible sources. In this study, the authors describe two previously unidentified sounds, recorded at up to five widely-spaced sites (30 × 30 degree area) in the southern Indian Ocean, in 2007 and between 2010 and 2015. The first reported signal (M-call) consists of a single tonal unit near 22 Hz and lasting about 10 s, repeated with an interval longer than 2 min. This signal is only detected in 2007. The second signal (P-call) is also a tonal unit of 10 s, repeated every 160 s, but at a frequency near 27 Hz. Its yearly number increased greatly between 2007 and 2010, and moderately since then. Based on their characteristics and seasonal patterns, this study shows that both signals are clearly distinct from any known calls of blue whale subspecies and populations dwelling in the southern Indian Ocean. However, they display similarities with blue whale vocalizations. More particularly, the P-call can be mistaken for the first tonal unit of the Antarctic blue whale Z-call. Article in Journal/Newspaper Antarc* Antarctic Blue whale Institut national des sciences de l'Univers: HAL-INSU Antarctic Indian The Antarctic The Journal of the Acoustical Society of America 142 3 1413 1427 |