Movements and dive behaviour of a toothfish-depredating killer and sperm whale Towers, Jared R, Tixier, Paul, Ross, Katherine A, Bennett, John, Arnould, John PY, Pitman, Robert L and Durban, John W 2019, Movements and dive behaviour of a toothfish-depredating killer and sperm whale, ICES journal of marine science, vol. 76, no. 1, Jan-Feb, pp. 298-311, doi: 10.1093/icesjms/fsy118. Attached Files Name Description MIMEType Size Downloads Title Movements and dive behaviour of a toothfish-depredating killer and sperm whale Author(s) Towers, Jared R Tixier, Paul orcid.org/0000-0002-7325-3573 Ross, Katherine A Bennett, John Arnould, John PY orcid.org/0000-0003-1124-9330 Pitman, Robert L Durban, John W Journal name ICES journal of marine science Volume number 76 Issue number 1 Season Jan-Feb Start page 298 End page 311 Total pages 14 Publisher Oxford University Press Place of publication Oxford, Eng. Publication date 2019-01 ISSN 1054-3139 1095-9289 Keyword(s) competition depredation diving foraging killer whales movements Patagonian toothfish South Georgia sperm whales Science & Technology Life Sciences & Biomedicine Physical Sciences Fisheries Marine & Freshwater Biology Oceanography Summary 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. Language eng DOI 10.1093/icesjms/fsy118 Field of Research MD Multidisciplinary HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2018, International Council for the Exploration of the Sea Persistent URL http://hdl.handle.net/10536/DRO/DU:30120094 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Life and Environmental Sciences Centre for Integrative Ecology Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Wed, 20 Mar 2019, 18:56:30 EST Wed, 20 Mar 2019, 18:57:00 EST Thu, 21 Mar 2019, 04:01:06 EST Sat, 20 Apr 2019, 02:30:24 EST Wed, 22 May 2019, 06:05:21 EST Fri, 24 May 2019, 12:06:43 EST Fri, 24 May 2019, 12:08:50 EST Fri, 24 May 2019, 12:09:35 EST Filtered Full Citation counts:   Cited 6 times in TR Web of Science Cited 7 times in Scopus Search Google Scholar Access Statistics: 121 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Wed, 20 Mar 2019, 18:57:00 EST

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