Movements and dive behaviour of a toothfish-depredating killer and sperm whale
Abstract Depredation of demersal longlines by killer and sperm whales is a widespread behaviour that impacts fisheries and whale populations. To better understand how depredating whales behave in response to fishing activity, we deployed satellite-linked location and dive-profile tags on a sperm and...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsy118 http://academic.oup.com/icesjms/article-pdf/76/1/298/31238147/fsy118.pdf |
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croxfordunivpr:10.1093/icesjms/fsy118 2024-09-15T18:16:41+00:00 Movements and dive behaviour of a toothfish-depredating killer and sperm whale Towers, Jared R Tixier, Paul Ross, Katherine A Bennett, John Arnould, John P Y Pitman, Robert L Durban, John W Northridge, Simon 2018 http://dx.doi.org/10.1093/icesjms/fsy118 http://academic.oup.com/icesjms/article-pdf/76/1/298/31238147/fsy118.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science volume 76, issue 1, page 298-311 ISSN 1054-3139 1095-9289 journal-article 2018 croxfordunivpr https://doi.org/10.1093/icesjms/fsy118 2024-07-29T04:22:40Z Abstract Depredation of demersal longlines by killer and sperm whales is a widespread behaviour that impacts fisheries and whale populations. To better understand how depredating whales behave in response to fishing activity, we deployed satellite-linked location and dive-profile tags on a sperm and killer whale that were depredating Patagonian toothfish from commercial longlines off South Georgia. The sperm and killer whale followed one fishing vessel for >180 km and >300 km and repeatedly depredated when longlines were being retrieved over periods of 6 and 7 d, respectively. Their behaviours were also sometimes correlated with the depths and locations of deployed gear. They both dove significantly deeper and faster when depredating compared with when foraging naturally. The killer whale dove >750 m on five occasions while depredating (maximum: 1087 m), but these deep dives were always followed by long periods (3.9–4.6 h) of shallow (<100 m) diving. We hypothesize that energetically and physiologically costly dive behaviour while depredating is driven by intra- and inter-specific competition due to the limited availability of this abundant resource. Article in Journal/Newspaper Killer Whale Patagonian Toothfish Sperm whale Killer whale Oxford University Press ICES Journal of Marine Science 76 1 298 311 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Depredation of demersal longlines by killer and sperm whales is a widespread behaviour that impacts fisheries and whale populations. To better understand how depredating whales behave in response to fishing activity, we deployed satellite-linked location and dive-profile tags on a sperm and killer whale that were depredating Patagonian toothfish from commercial longlines off South Georgia. The sperm and killer whale followed one fishing vessel for >180 km and >300 km and repeatedly depredated when longlines were being retrieved over periods of 6 and 7 d, respectively. Their behaviours were also sometimes correlated with the depths and locations of deployed gear. They both dove significantly deeper and faster when depredating compared with when foraging naturally. The killer whale dove >750 m on five occasions while depredating (maximum: 1087 m), but these deep dives were always followed by long periods (3.9–4.6 h) of shallow (<100 m) diving. We hypothesize that energetically and physiologically costly dive behaviour while depredating is driven by intra- and inter-specific competition due to the limited availability of this abundant resource. |
author2 |
Northridge, Simon |
format |
Article in Journal/Newspaper |
author |
Towers, Jared R Tixier, Paul Ross, Katherine A Bennett, John Arnould, John P Y Pitman, Robert L Durban, John W |
spellingShingle |
Towers, Jared R Tixier, Paul Ross, Katherine A Bennett, John Arnould, John P Y Pitman, Robert L Durban, John W Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
author_facet |
Towers, Jared R Tixier, Paul Ross, Katherine A Bennett, John Arnould, John P Y Pitman, Robert L Durban, John W |
author_sort |
Towers, Jared R |
title |
Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
title_short |
Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
title_full |
Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
title_fullStr |
Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
title_full_unstemmed |
Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
title_sort |
movements and dive behaviour of a toothfish-depredating killer and sperm whale |
publisher |
Oxford University Press (OUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1093/icesjms/fsy118 http://academic.oup.com/icesjms/article-pdf/76/1/298/31238147/fsy118.pdf |
genre |
Killer Whale Patagonian Toothfish Sperm whale Killer whale |
genre_facet |
Killer Whale Patagonian Toothfish Sperm whale Killer whale |
op_source |
ICES Journal of Marine Science volume 76, issue 1, page 298-311 ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsy118 |
container_title |
ICES Journal of Marine Science |
container_volume |
76 |
container_issue |
1 |
container_start_page |
298 |
op_container_end_page |
311 |
_version_ |
1810454696854290432 |