Vocal characteristics of pygmy blue whales and their change over time
Vocal characteristics of pygmy blue whales of the eastern Indian Ocean population were analyzed using data from a hydroacoustic station deployed off Cape Leeuwin in Western Australia as part of the Comprehensive Nuclear-Test-Ban Treaty monitoring network, from two acoustic observatories of the Austr...
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Acoustical Soceity of America
2011
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Online Access: | https://hdl.handle.net/20.500.11937/31405 https://doi.org/10.1121/1.3651817 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/31405 2023-06-11T04:10:41+02:00 Vocal characteristics of pygmy blue whales and their change over time Gavrilov, Alexander McCauley, Robert Salgado Kent, Chandra Tripovich, J. Burton, C. 2011 restricted https://hdl.handle.net/20.500.11937/31405 https://doi.org/10.1121/1.3651817 unknown Acoustical Soceity of America http://hdl.handle.net/20.500.11937/31405 doi:10.1121/1.3651817 oceanographic regions bioacoustics biocommunications underwater sound Journal Article 2011 ftcurtin https://doi.org/20.500.11937/3140510.1121/1.3651817 2023-05-30T19:36:32Z Vocal characteristics of pygmy blue whales of the eastern Indian Ocean population were analyzed using data from a hydroacoustic station deployed off Cape Leeuwin in Western Australia as part of the Comprehensive Nuclear-Test-Ban Treaty monitoring network, from two acoustic observatories of the Australian Integrated Marine Observing System, and from individual sea noise loggers deployed in the Perth Canyon. These data have been collected from 2002 to 2010, inclusively. It is shown that the themes of pygmy blue whale songs consist of ether three or two repeating tonal sounds with harmonics. The most intense sound of the tonal theme was estimated to correspond to a source level of 179 ± 2 dB re 1 μPa at 1 m measured for 120 calls from seven different animals. Short-duration calls of impulsive downswept sound from pygmy blue whales were weaker with the source level estimated to vary between 168 to 176 dB. A gradual decrease in the call frequency with a mean rate estimated to be 0.35 ± 0.3 Hz/year was observed over nine years in the frequency of the third harmonic of tonal sound 2 in the whale song theme, which corresponds to a negative trend of about 0.12 Hz/year in the call fundamental frequency. Article in Journal/Newspaper Blue whale Curtin University: espace Indian The Journal of the Acoustical Society of America 130 6 3651 3660 |
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Curtin University: espace |
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ftcurtin |
language |
unknown |
topic |
oceanographic regions bioacoustics biocommunications underwater sound |
spellingShingle |
oceanographic regions bioacoustics biocommunications underwater sound Gavrilov, Alexander McCauley, Robert Salgado Kent, Chandra Tripovich, J. Burton, C. Vocal characteristics of pygmy blue whales and their change over time |
topic_facet |
oceanographic regions bioacoustics biocommunications underwater sound |
description |
Vocal characteristics of pygmy blue whales of the eastern Indian Ocean population were analyzed using data from a hydroacoustic station deployed off Cape Leeuwin in Western Australia as part of the Comprehensive Nuclear-Test-Ban Treaty monitoring network, from two acoustic observatories of the Australian Integrated Marine Observing System, and from individual sea noise loggers deployed in the Perth Canyon. These data have been collected from 2002 to 2010, inclusively. It is shown that the themes of pygmy blue whale songs consist of ether three or two repeating tonal sounds with harmonics. The most intense sound of the tonal theme was estimated to correspond to a source level of 179 ± 2 dB re 1 μPa at 1 m measured for 120 calls from seven different animals. Short-duration calls of impulsive downswept sound from pygmy blue whales were weaker with the source level estimated to vary between 168 to 176 dB. A gradual decrease in the call frequency with a mean rate estimated to be 0.35 ± 0.3 Hz/year was observed over nine years in the frequency of the third harmonic of tonal sound 2 in the whale song theme, which corresponds to a negative trend of about 0.12 Hz/year in the call fundamental frequency. |
format |
Article in Journal/Newspaper |
author |
Gavrilov, Alexander McCauley, Robert Salgado Kent, Chandra Tripovich, J. Burton, C. |
author_facet |
Gavrilov, Alexander McCauley, Robert Salgado Kent, Chandra Tripovich, J. Burton, C. |
author_sort |
Gavrilov, Alexander |
title |
Vocal characteristics of pygmy blue whales and their change over time |
title_short |
Vocal characteristics of pygmy blue whales and their change over time |
title_full |
Vocal characteristics of pygmy blue whales and their change over time |
title_fullStr |
Vocal characteristics of pygmy blue whales and their change over time |
title_full_unstemmed |
Vocal characteristics of pygmy blue whales and their change over time |
title_sort |
vocal characteristics of pygmy blue whales and their change over time |
publisher |
Acoustical Soceity of America |
publishDate |
2011 |
url |
https://hdl.handle.net/20.500.11937/31405 https://doi.org/10.1121/1.3651817 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Blue whale |
genre_facet |
Blue whale |
op_relation |
http://hdl.handle.net/20.500.11937/31405 doi:10.1121/1.3651817 |
op_doi |
https://doi.org/20.500.11937/3140510.1121/1.3651817 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
130 |
container_issue |
6 |
container_start_page |
3651 |
op_container_end_page |
3660 |
_version_ |
1768385278910660608 |