Movements and dive behaviour of a toothfish-depredating killer and sperm whale
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 w...
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ftdeakinunifig:oai:figshare.com:article/20764222 2024-06-23T07:54:22+00:00 Movements and dive behaviour of a toothfish-depredating killer and sperm whale JR Towers P Tixier KA Ross J Bennett John Arnould RL Pitman JW Durban 2019-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30120094 https://figshare.com/articles/journal_contribution/Movements_and_dive_behaviour_of_a_toothfish-depredating_killer_and_sperm_whale/20764222 unknown http://hdl.handle.net/10536/DRO/DU:30120094 https://figshare.com/articles/journal_contribution/Movements_and_dive_behaviour_of_a_toothfish-depredating_killer_and_sperm_whale/20764222 All Rights Reserved competition depredation diving foraging killer whales movements Patagonian toothfish South Georgia sperm whales MD Multidisciplinary Text Journal contribution 2019 ftdeakinunifig 2024-06-06T02:05:01Z 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 DRO - Deakin Research Online |
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Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
competition depredation diving foraging killer whales movements Patagonian toothfish South Georgia sperm whales MD Multidisciplinary |
spellingShingle |
competition depredation diving foraging killer whales movements Patagonian toothfish South Georgia sperm whales MD Multidisciplinary JR Towers P Tixier KA Ross J Bennett John Arnould RL Pitman JW Durban Movements and dive behaviour of a toothfish-depredating killer and sperm whale |
topic_facet |
competition depredation diving foraging killer whales movements Patagonian toothfish South Georgia sperm whales MD Multidisciplinary |
description |
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. |
format |
Article in Journal/Newspaper |
author |
JR Towers P Tixier KA Ross J Bennett John Arnould RL Pitman JW Durban |
author_facet |
JR Towers P Tixier KA Ross J Bennett John Arnould RL Pitman JW Durban |
author_sort |
JR Towers |
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 |
publishDate |
2019 |
url |
http://hdl.handle.net/10536/DRO/DU:30120094 https://figshare.com/articles/journal_contribution/Movements_and_dive_behaviour_of_a_toothfish-depredating_killer_and_sperm_whale/20764222 |
genre |
Killer Whale Patagonian Toothfish Sperm whale Killer whale |
genre_facet |
Killer Whale Patagonian Toothfish Sperm whale Killer whale |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30120094 https://figshare.com/articles/journal_contribution/Movements_and_dive_behaviour_of_a_toothfish-depredating_killer_and_sperm_whale/20764222 |
op_rights |
All Rights Reserved |
_version_ |
1802646496296828928 |