Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals
Background: Although there have been recent advances in the development of animal-attached ‘proximity’ tags to remotely record the interactions of multiple individuals, the efficacy of these devices depends on the instrumentation of sufficient animals that subsequently have spatial interactions. Amo...
Published in: | Animal Biotelemetry |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | http://hdl.handle.net/10023/7581 https://doi.org/10.1186/s40317-015-0083-2 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/7581 |
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openpolar |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Pinniped Animal-attached camera Sociality Foraging Groups Arctocephalus gazella QH301 Biology SDG 14 - Life Below Water QH301 |
spellingShingle |
Pinniped Animal-attached camera Sociality Foraging Groups Arctocephalus gazella QH301 Biology SDG 14 - Life Below Water QH301 Hooker, Sascha Kate Barychka, Tatsiana Jessopp, Mark J Staniland, Iain J Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
topic_facet |
Pinniped Animal-attached camera Sociality Foraging Groups Arctocephalus gazella QH301 Biology SDG 14 - Life Below Water QH301 |
description |
Background: Although there have been recent advances in the development of animal-attached ‘proximity’ tags to remotely record the interactions of multiple individuals, the efficacy of these devices depends on the instrumentation of sufficient animals that subsequently have spatial interactions. Among densely colonial mammals such as fur seals, this remains logistically difficult, and interactions between animals during foraging have not previously been recorded. Results: We collected data on conspecific interactions during diving at sea using still image and video cameras deployed on 23 Antarctic fur seals. Animals carried cameras for a total of 152 days, collecting 38,098 images and 369 movies (total time 7.35 h). Other fur seals were detected in 74% of deployments, with a maximum of five seals seen at one time (n = 122 images, 28 videos). No predators other than conspecifics were observed. Detection was primarily limited by light conditions, since conspecifics were usually further from each other than the 1-m range illuminated by camera flash under low light levels. Other seals were recorded at a range of depths (average 27 ± 14.3 m, max 66 m). In terms of bouts of dives, still images of other seals were recorded in 5 single dives (of 330) and 28 bouts of dives <2 min apart (of 187). Linear mixed models suggested a relationship between conspecific observations per dive and the number of krill images recorded per dive. Using light conditions as a proxy for detectability, other seals were more likely to be observed at the bottom of dives than during descent or ascent. Seals were also more likely to be closer to each other and oriented perpendicular to each other at the bottom of dives, and in the same direction as each other during ascent. Conclusions: These results are contrary to animal-attached camera observations of penguin foraging, suggesting differing group-foraging tactics for these marine predators. Group foraging could have consequences for models linking predator behaviour to prey field densities ... |
author2 |
The Royal Society University of St Andrews. School of Biology University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute University of St Andrews. Institute of Behavioural and Neural Sciences University of St Andrews. St Andrews Sustainability Institute University of St Andrews. Sea Mammal Research Unit |
format |
Article in Journal/Newspaper |
author |
Hooker, Sascha Kate Barychka, Tatsiana Jessopp, Mark J Staniland, Iain J |
author_facet |
Hooker, Sascha Kate Barychka, Tatsiana Jessopp, Mark J Staniland, Iain J |
author_sort |
Hooker, Sascha Kate |
title |
Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
title_short |
Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
title_full |
Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
title_fullStr |
Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
title_full_unstemmed |
Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals |
title_sort |
images as proximity sensors : the incidence of conspecific foraging in antarctic fur seals |
publishDate |
2015 |
url |
http://hdl.handle.net/10023/7581 https://doi.org/10.1186/s40317-015-0083-2 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
op_relation |
Animal Biotelemetry Hooker , S K , Barychka , T , Jessopp , M J & Staniland , I J 2015 , ' Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals ' , Animal Biotelemetry , vol. 3 , 37 . https://doi.org/10.1186/s40317-015-0083-2 2050-3385 PURE: 193890101 PURE UUID: 5e5e860f-a9b1-42aa-af33-c701de5b7611 Scopus: 85018192858 ORCID: /0000-0002-7518-3548/work/47136149 http://hdl.handle.net/10023/7581 https://doi.org/10.1186/s40317-015-0083-2 |
op_rights |
© 2015 Hooker et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
op_doi |
https://doi.org/10.1186/s40317-015-0083-2 |
container_title |
Animal Biotelemetry |
container_volume |
3 |
container_issue |
1 |
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1770274423590354944 |
spelling |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/7581 2023-07-02T03:30:11+02:00 Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals Hooker, Sascha Kate Barychka, Tatsiana Jessopp, Mark J Staniland, Iain J The Royal Society University of St Andrews. School of Biology University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute University of St Andrews. Institute of Behavioural and Neural Sciences University of St Andrews. St Andrews Sustainability Institute University of St Andrews. Sea Mammal Research Unit 2015-10-01T23:12:40Z 11 application/pdf http://hdl.handle.net/10023/7581 https://doi.org/10.1186/s40317-015-0083-2 eng eng Animal Biotelemetry Hooker , S K , Barychka , T , Jessopp , M J & Staniland , I J 2015 , ' Images as proximity sensors : the incidence of conspecific foraging in Antarctic fur seals ' , Animal Biotelemetry , vol. 3 , 37 . https://doi.org/10.1186/s40317-015-0083-2 2050-3385 PURE: 193890101 PURE UUID: 5e5e860f-a9b1-42aa-af33-c701de5b7611 Scopus: 85018192858 ORCID: /0000-0002-7518-3548/work/47136149 http://hdl.handle.net/10023/7581 https://doi.org/10.1186/s40317-015-0083-2 © 2015 Hooker et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Pinniped Animal-attached camera Sociality Foraging Groups Arctocephalus gazella QH301 Biology SDG 14 - Life Below Water QH301 Journal article 2015 ftstandrewserep https://doi.org/10.1186/s40317-015-0083-2 2023-06-13T18:30:44Z Background: Although there have been recent advances in the development of animal-attached ‘proximity’ tags to remotely record the interactions of multiple individuals, the efficacy of these devices depends on the instrumentation of sufficient animals that subsequently have spatial interactions. Among densely colonial mammals such as fur seals, this remains logistically difficult, and interactions between animals during foraging have not previously been recorded. Results: We collected data on conspecific interactions during diving at sea using still image and video cameras deployed on 23 Antarctic fur seals. Animals carried cameras for a total of 152 days, collecting 38,098 images and 369 movies (total time 7.35 h). Other fur seals were detected in 74% of deployments, with a maximum of five seals seen at one time (n = 122 images, 28 videos). No predators other than conspecifics were observed. Detection was primarily limited by light conditions, since conspecifics were usually further from each other than the 1-m range illuminated by camera flash under low light levels. Other seals were recorded at a range of depths (average 27 ± 14.3 m, max 66 m). In terms of bouts of dives, still images of other seals were recorded in 5 single dives (of 330) and 28 bouts of dives <2 min apart (of 187). Linear mixed models suggested a relationship between conspecific observations per dive and the number of krill images recorded per dive. Using light conditions as a proxy for detectability, other seals were more likely to be observed at the bottom of dives than during descent or ascent. Seals were also more likely to be closer to each other and oriented perpendicular to each other at the bottom of dives, and in the same direction as each other during ascent. Conclusions: These results are contrary to animal-attached camera observations of penguin foraging, suggesting differing group-foraging tactics for these marine predators. Group foraging could have consequences for models linking predator behaviour to prey field densities ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella University of St Andrews: Digital Research Repository Antarctic Animal Biotelemetry 3 1 |