Humpback whale call repertoire on a northeastern Newfoundland foraging ground
Abstract Humpback whales ( Megaptera novaeangliae ) are a highly vocal baleen whale species with a diverse acoustic repertoire. “Song” has been well studied, while discrete “calls” have been described in a limited number of regions. We aimed to quantitatively describe calls from coastal Newfoundland...
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crwiley:10.1111/mms.12859 2023-12-03T10:20:00+01:00 Humpback whale call repertoire on a northeastern Newfoundland foraging ground Epp, Mikala V. Fournet, Michelle E. H. Davoren, Gail K. Natural Sciences and Engineering Research Council of Canada 2021 http://dx.doi.org/10.1111/mms.12859 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12859 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12859 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 38, issue 1, page 256-273 ISSN 0824-0469 1748-7692 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2021 crwiley https://doi.org/10.1111/mms.12859 2023-11-09T14:04:17Z Abstract Humpback whales ( Megaptera novaeangliae ) are a highly vocal baleen whale species with a diverse acoustic repertoire. “Song” has been well studied, while discrete “calls” have been described in a limited number of regions. We aimed to quantitatively describe calls from coastal Newfoundland, Canada, where foraging humpback whales aggregate during the summer. Recordings were made in July–August 2015 and 2016. Extracted calls were assigned to call types using aural/visual (AV) characteristics, and then agreement between quantitative acoustic parameters and qualitative call assignments was assessed using a supervised random forest (RF) analysis. The RF classified calls well (96% agreement) into three broad classes (high frequency (HF), low frequency (LF), pulsed (P)), but agreement for call types within classes was lower (LF: 63%; P: 85%; HF: 81%). We found support for a repertoire of 13 call types based on either high (≥70%) RF agreement (9 call types) or high (≥70%) AV agreement between two observers (4 call types). Five call types (swops, droplets, teepees, growls and whups) were qualitatively similar to call types from other regions. We propose that the variable classification agreement is reflective of the graded nature of humpback whale calls and present a gradation model to demonstrate the suggested continuum. Article in Journal/Newspaper baleen whale Humpback Whale Megaptera novaeangliae Newfoundland Wiley Online Library (via Crossref) Canada Marine Mammal Science |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
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crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Epp, Mikala V. Fournet, Michelle E. H. Davoren, Gail K. Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Humpback whales ( Megaptera novaeangliae ) are a highly vocal baleen whale species with a diverse acoustic repertoire. “Song” has been well studied, while discrete “calls” have been described in a limited number of regions. We aimed to quantitatively describe calls from coastal Newfoundland, Canada, where foraging humpback whales aggregate during the summer. Recordings were made in July–August 2015 and 2016. Extracted calls were assigned to call types using aural/visual (AV) characteristics, and then agreement between quantitative acoustic parameters and qualitative call assignments was assessed using a supervised random forest (RF) analysis. The RF classified calls well (96% agreement) into three broad classes (high frequency (HF), low frequency (LF), pulsed (P)), but agreement for call types within classes was lower (LF: 63%; P: 85%; HF: 81%). We found support for a repertoire of 13 call types based on either high (≥70%) RF agreement (9 call types) or high (≥70%) AV agreement between two observers (4 call types). Five call types (swops, droplets, teepees, growls and whups) were qualitatively similar to call types from other regions. We propose that the variable classification agreement is reflective of the graded nature of humpback whale calls and present a gradation model to demonstrate the suggested continuum. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Epp, Mikala V. Fournet, Michelle E. H. Davoren, Gail K. |
author_facet |
Epp, Mikala V. Fournet, Michelle E. H. Davoren, Gail K. |
author_sort |
Epp, Mikala V. |
title |
Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
title_short |
Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
title_full |
Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
title_fullStr |
Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
title_full_unstemmed |
Humpback whale call repertoire on a northeastern Newfoundland foraging ground |
title_sort |
humpback whale call repertoire on a northeastern newfoundland foraging ground |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/mms.12859 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12859 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12859 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
baleen whale Humpback Whale Megaptera novaeangliae Newfoundland |
genre_facet |
baleen whale Humpback Whale Megaptera novaeangliae Newfoundland |
op_source |
Marine Mammal Science volume 38, issue 1, page 256-273 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12859 |
container_title |
Marine Mammal Science |
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1784267410604294144 |