Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types
International audience A decrease in the frequency of two southeast Pacific blue whale song types was examined over decades, using acoustic data from several different sources in the eastern Pacific Ocean ranging between the Equator and Chilean Patagonia. The pulse rate of the song units as well as...
Published in: | Scientific Reports |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669/document https://hal.archives-ouvertes.fr/hal-02586669/file/2020_malige_et_al_inter-annual_decrease_in_pulse_rate_and_peak_frequency_of_Southeast_Pacific_blue_whale_song_types.pdf https://doi.org/10.1038/s41598-020-64613-0 |
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English |
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blue whale song frequency decrease [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
blue whale song frequency decrease [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] [SDV.BA]Life Sciences [q-bio]/Animal biology Patris, Julie Buchan, Susannah, Stafford, Kathleen, Findlay, Ken Hucke-Gaete, Rodrigo Neira, Sergio Clark, Christopher Glotin, Hervé Malige, Franck Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
topic_facet |
blue whale song frequency decrease [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
International audience A decrease in the frequency of two southeast Pacific blue whale song types was examined over decades, using acoustic data from several different sources in the eastern Pacific Ocean ranging between the Equator and Chilean Patagonia. The pulse rate of the song units as well as their peak frequency were measured using two different methods (summed auto-correlation and Fourier transform). The sources of error associated with each measurement were assessed. There was a linear decline in both parameters for the more common song type (southeast Pacific song type n.2) between 1997 to 2017. An abbreviated analysis, also showed a frequency decline in the scarcer southeast Pacific song type n.1 between 1970 to 2014, revealing that both song types are declining at similar rates. We discussed the use of measuring both pulse rate and peak frequency to examine the frequency decline. Finally, a comparison of the rates of frequency decline with other song types reported in the literature and a discussion on the reasons of the frequency shift are presented. Blue whale (Balaenoptera musculus) songs are the repetition of several highly stereotyped low-frequency, high energy units that compose song phrases, first described in 1971 1. Song units and phrases have been qualified as'remarkably consistent' within a song, but also between individuals 1. Song in blue whales has been attributed to reproductive display by males 2. Numerous, distinct songs have been identified worldwide 3 , each displaying stability in the temporal and frequency characteristics of units and phrases and intervals between units or phrases. However, this global pattern has been shown to be affected by a general decreasing trend in frequency over dec-adal timescales 4. This linear decline in tonal frequencies of blue whale song types is a recently described unexplained phenomenon. It appears to occur worldwide, based on analyses of different regional song types, spanning five decades 4. New studies have recently confirmed these results ... |
author2 |
Laboratoire d'Informatique et Systèmes (LIS) Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Centro de Estudios Avanzados en Zonas Aridas (CEAZA) Centro de Investigación Oceanográfica en el Pacífico Sur Oriental (COPAS) Universidad de Concepción Chile Cornell University New York Laboratoire des Sciences de l'Information et des Systèmes (LSIS) Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Université de Toulon (UTLN)-Aix Marseille Université (AMU) |
format |
Article in Journal/Newspaper |
author |
Patris, Julie Buchan, Susannah, Stafford, Kathleen, Findlay, Ken Hucke-Gaete, Rodrigo Neira, Sergio Clark, Christopher Glotin, Hervé Malige, Franck |
author_facet |
Patris, Julie Buchan, Susannah, Stafford, Kathleen, Findlay, Ken Hucke-Gaete, Rodrigo Neira, Sergio Clark, Christopher Glotin, Hervé Malige, Franck |
author_sort |
Patris, Julie |
title |
Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
title_short |
Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
title_full |
Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
title_fullStr |
Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
title_full_unstemmed |
Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types |
title_sort |
inter-annual decrease in pulse rate and peak frequency of southeast pacific blue whale song types |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669/document https://hal.archives-ouvertes.fr/hal-02586669/file/2020_malige_et_al_inter-annual_decrease_in_pulse_rate_and_peak_frequency_of_Southeast_Pacific_blue_whale_song_types.pdf https://doi.org/10.1038/s41598-020-64613-0 |
geographic |
Pacific Patagonia |
geographic_facet |
Pacific Patagonia |
genre |
Balaenoptera musculus Blue whale |
genre_facet |
Balaenoptera musculus Blue whale |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.archives-ouvertes.fr/hal-02586669 Scientific Reports, Nature Publishing Group, 2020, ⟨10.1038/s41598-020-64613-0⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-020-64613-0 hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669/document https://hal.archives-ouvertes.fr/hal-02586669/file/2020_malige_et_al_inter-annual_decrease_in_pulse_rate_and_peak_frequency_of_Southeast_Pacific_blue_whale_song_types.pdf doi:10.1038/s41598-020-64613-0 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-020-64613-0 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
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1766366785105297408 |
spelling |
ftccsdartic:oai:HAL:hal-02586669v1 2023-05-15T15:36:26+02:00 Inter-annual decrease in pulse rate and peak frequency of Southeast Pacific blue whale song types Patris, Julie Buchan, Susannah, Stafford, Kathleen, Findlay, Ken Hucke-Gaete, Rodrigo Neira, Sergio Clark, Christopher Glotin, Hervé Malige, Franck Laboratoire d'Informatique et Systèmes (LIS) Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Centro de Estudios Avanzados en Zonas Aridas (CEAZA) Centro de Investigación Oceanográfica en el Pacífico Sur Oriental (COPAS) Universidad de Concepción Chile Cornell University New York Laboratoire des Sciences de l'Information et des Systèmes (LSIS) Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Université de Toulon (UTLN)-Aix Marseille Université (AMU) 2020-05-15 https://hal.archives-ouvertes.fr/hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669/document https://hal.archives-ouvertes.fr/hal-02586669/file/2020_malige_et_al_inter-annual_decrease_in_pulse_rate_and_peak_frequency_of_Southeast_Pacific_blue_whale_song_types.pdf https://doi.org/10.1038/s41598-020-64613-0 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-020-64613-0 hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669 https://hal.archives-ouvertes.fr/hal-02586669/document https://hal.archives-ouvertes.fr/hal-02586669/file/2020_malige_et_al_inter-annual_decrease_in_pulse_rate_and_peak_frequency_of_Southeast_Pacific_blue_whale_song_types.pdf doi:10.1038/s41598-020-64613-0 info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.archives-ouvertes.fr/hal-02586669 Scientific Reports, Nature Publishing Group, 2020, ⟨10.1038/s41598-020-64613-0⟩ blue whale song frequency decrease [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1038/s41598-020-64613-0 2021-11-07T01:08:50Z International audience A decrease in the frequency of two southeast Pacific blue whale song types was examined over decades, using acoustic data from several different sources in the eastern Pacific Ocean ranging between the Equator and Chilean Patagonia. The pulse rate of the song units as well as their peak frequency were measured using two different methods (summed auto-correlation and Fourier transform). The sources of error associated with each measurement were assessed. There was a linear decline in both parameters for the more common song type (southeast Pacific song type n.2) between 1997 to 2017. An abbreviated analysis, also showed a frequency decline in the scarcer southeast Pacific song type n.1 between 1970 to 2014, revealing that both song types are declining at similar rates. We discussed the use of measuring both pulse rate and peak frequency to examine the frequency decline. Finally, a comparison of the rates of frequency decline with other song types reported in the literature and a discussion on the reasons of the frequency shift are presented. Blue whale (Balaenoptera musculus) songs are the repetition of several highly stereotyped low-frequency, high energy units that compose song phrases, first described in 1971 1. Song units and phrases have been qualified as'remarkably consistent' within a song, but also between individuals 1. Song in blue whales has been attributed to reproductive display by males 2. Numerous, distinct songs have been identified worldwide 3 , each displaying stability in the temporal and frequency characteristics of units and phrases and intervals between units or phrases. However, this global pattern has been shown to be affected by a general decreasing trend in frequency over dec-adal timescales 4. This linear decline in tonal frequencies of blue whale song types is a recently described unexplained phenomenon. It appears to occur worldwide, based on analyses of different regional song types, spanning five decades 4. New studies have recently confirmed these results ... Article in Journal/Newspaper Balaenoptera musculus Blue whale Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Patagonia Scientific Reports 10 1 |