Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song.
The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual pattern in tonal frequency. While a number of...
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ftdoajarticles:oai:doaj.org/article:7b978ea8c4734a419df43207187e0662 2023-05-15T13:33:10+02:00 Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. Brian S Miller Russell Leaper Susannah Calderan Jason Gedamke 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0107740 https://doaj.org/article/7b978ea8c4734a419df43207187e0662 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4168226?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0107740 https://doaj.org/article/7b978ea8c4734a419df43207187e0662 PLoS ONE, Vol 9, Iss 9, p e107740 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0107740 2022-12-31T02:16:02Z The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual pattern in tonal frequency. While a number of hypotheses for this long-term decline have been investigated, including changes in population structure, changes in the physical environment, and changes in the behaviour of the whales, there have been relatively few attempts to explain the intra-annual pattern. An additional hypothesis that has not yet been investigated is that differences in the observed frequency from each call are due to the Doppler effect. The assumptions and implications of the Doppler effect on whale song are investigated using 1) vessel-based acoustic recordings of Antarctic blue whales with simultaneous observation of whale movement and 2) long-term acoustic recordings from both the subtropics and Antarctic. Results from vessel-based recordings of Antarctic blue whales indicate that variation in peak-frequency between calls produced by an individual whale was greater than would be expected by the movement of the whale alone. Furthermore, analysis of intra-annual frequency shift at Antarctic recording stations indicates that the Doppler effect is unlikely to fully explain the observations of intra-annual pattern in the frequency of Antarctic blue whale song. However, data do show cyclical changes in frequency in conjunction with season, thus suggesting that there might be a relationship among tonal frequency, body condition, and migration to and from Antarctic feeding grounds. Article in Journal/Newspaper Antarc* Antarctic Balaenoptera musculus Blue whale Directory of Open Access Journals: DOAJ Articles Antarctic PLoS ONE 9 9 e107740 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Brian S Miller Russell Leaper Susannah Calderan Jason Gedamke Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
topic_facet |
Medicine R Science Q |
description |
The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual pattern in tonal frequency. While a number of hypotheses for this long-term decline have been investigated, including changes in population structure, changes in the physical environment, and changes in the behaviour of the whales, there have been relatively few attempts to explain the intra-annual pattern. An additional hypothesis that has not yet been investigated is that differences in the observed frequency from each call are due to the Doppler effect. The assumptions and implications of the Doppler effect on whale song are investigated using 1) vessel-based acoustic recordings of Antarctic blue whales with simultaneous observation of whale movement and 2) long-term acoustic recordings from both the subtropics and Antarctic. Results from vessel-based recordings of Antarctic blue whales indicate that variation in peak-frequency between calls produced by an individual whale was greater than would be expected by the movement of the whale alone. Furthermore, analysis of intra-annual frequency shift at Antarctic recording stations indicates that the Doppler effect is unlikely to fully explain the observations of intra-annual pattern in the frequency of Antarctic blue whale song. However, data do show cyclical changes in frequency in conjunction with season, thus suggesting that there might be a relationship among tonal frequency, body condition, and migration to and from Antarctic feeding grounds. |
format |
Article in Journal/Newspaper |
author |
Brian S Miller Russell Leaper Susannah Calderan Jason Gedamke |
author_facet |
Brian S Miller Russell Leaper Susannah Calderan Jason Gedamke |
author_sort |
Brian S Miller |
title |
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
title_short |
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
title_full |
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
title_fullStr |
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
title_full_unstemmed |
Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. |
title_sort |
red shift, blue shift: investigating doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of antarctic blue whale song. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0107740 https://doaj.org/article/7b978ea8c4734a419df43207187e0662 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Balaenoptera musculus Blue whale |
op_source |
PLoS ONE, Vol 9, Iss 9, p e107740 (2014) |
op_relation |
http://europepmc.org/articles/PMC4168226?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0107740 https://doaj.org/article/7b978ea8c4734a419df43207187e0662 |
op_doi |
https://doi.org/10.1371/journal.pone.0107740 |
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PLoS ONE |
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9 |
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9 |
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e107740 |
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