Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica
Killer whales (Orcinus orca) are top marine predators occurring globally. In Antarctic waters, five ecotypes have been described, with Type C being the smallest form of killer whale known. Acoustic recordings of nine encounters of Type C killer whales were collected in 2012 and 2013 in McMurdo Sound...
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ftpubmed:oai:pubmedcentral.nih.gov:7062068 2023-05-15T13:45:33+02:00 Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica Wellard, Rebecca Pitman, Robert L. Durban, John Erbe, Christine 2020-02-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062068/ https://doi.org/10.1098/rsos.191228 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062068/ http://dx.doi.org/10.1098/rsos.191228 © 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Ecology Conservation and Global Change Biology Text 2020 ftpubmed https://doi.org/10.1098/rsos.191228 2020-04-05T00:32:34Z Killer whales (Orcinus orca) are top marine predators occurring globally. In Antarctic waters, five ecotypes have been described, with Type C being the smallest form of killer whale known. Acoustic recordings of nine encounters of Type C killer whales were collected in 2012 and 2013 in McMurdo Sound, Ross Sea. In a combined 3.5 h of recordings, 6386 killer whale vocalizations were detected and graded based on their signal-to-noise ratio. Spectrograms of the highest-quality calls were examined for characteristic patterns yielding a catalogue of 28 call types (comprising 1250 calls). Acoustic parameters of each call were measured and summarized by call type. Type C killer whales produced complex calls, consisting of multiple frequency-modulated, amplitude-modulated and pulsed components. Often, two components occurred simultaneously, forming a biphonation; although the biphonic components did not necessarily start and end together, with one component lasting over several others. The addition and deletion of components yielded call subtypes. Call complexity appears stable over time and may be related to feeding ecology. Characterization of the Type C acoustic repertoire is an important step for the development of passive acoustic monitoring of the diverse assemblage of killer whale ecotypes in Antarctica's rapidly changing marine ecosystems. Text Antarc* Antarctic Antarctica Killer Whale McMurdo Sound Orca Orcinus orca Ross Sea Killer whale PubMed Central (PMC) Antarctic McMurdo Sound Ross Sea Royal Society Open Science 7 2 191228 |
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English |
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Ecology Conservation and Global Change Biology |
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Ecology Conservation and Global Change Biology Wellard, Rebecca Pitman, Robert L. Durban, John Erbe, Christine Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
topic_facet |
Ecology Conservation and Global Change Biology |
description |
Killer whales (Orcinus orca) are top marine predators occurring globally. In Antarctic waters, five ecotypes have been described, with Type C being the smallest form of killer whale known. Acoustic recordings of nine encounters of Type C killer whales were collected in 2012 and 2013 in McMurdo Sound, Ross Sea. In a combined 3.5 h of recordings, 6386 killer whale vocalizations were detected and graded based on their signal-to-noise ratio. Spectrograms of the highest-quality calls were examined for characteristic patterns yielding a catalogue of 28 call types (comprising 1250 calls). Acoustic parameters of each call were measured and summarized by call type. Type C killer whales produced complex calls, consisting of multiple frequency-modulated, amplitude-modulated and pulsed components. Often, two components occurred simultaneously, forming a biphonation; although the biphonic components did not necessarily start and end together, with one component lasting over several others. The addition and deletion of components yielded call subtypes. Call complexity appears stable over time and may be related to feeding ecology. Characterization of the Type C acoustic repertoire is an important step for the development of passive acoustic monitoring of the diverse assemblage of killer whale ecotypes in Antarctica's rapidly changing marine ecosystems. |
format |
Text |
author |
Wellard, Rebecca Pitman, Robert L. Durban, John Erbe, Christine |
author_facet |
Wellard, Rebecca Pitman, Robert L. Durban, John Erbe, Christine |
author_sort |
Wellard, Rebecca |
title |
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
title_short |
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
title_full |
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
title_fullStr |
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
title_full_unstemmed |
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica |
title_sort |
cold call: the acoustic repertoire of ross sea killer whales (orcinus orca, type c) in mcmurdo sound, antarctica |
publisher |
The Royal Society |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062068/ https://doi.org/10.1098/rsos.191228 |
geographic |
Antarctic McMurdo Sound Ross Sea |
geographic_facet |
Antarctic McMurdo Sound Ross Sea |
genre |
Antarc* Antarctic Antarctica Killer Whale McMurdo Sound Orca Orcinus orca Ross Sea Killer whale |
genre_facet |
Antarc* Antarctic Antarctica Killer Whale McMurdo Sound Orca Orcinus orca Ross Sea Killer whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062068/ http://dx.doi.org/10.1098/rsos.191228 |
op_rights |
© 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.191228 |
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Royal Society Open Science |
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7 |
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2 |
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191228 |
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1766227272001388544 |