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. Amon...
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ftnerc:oai:nora.nerc.ac.uk:512013 2023-05-15T13:49:32+02:00 Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals Hooker, Sascha K. Barychka, Tatsiana Jessopp, Mark J. Staniland, Iain J. 2015-09-29 text http://nora.nerc.ac.uk/id/eprint/512013/ https://nora.nerc.ac.uk/id/eprint/512013/1/s40317-015-0083-2.pdf https://doi.org/10.1186/s40317-015-0083-2 en eng https://nora.nerc.ac.uk/id/eprint/512013/1/s40317-015-0083-2.pdf Hooker, Sascha K.; Barychka, Tatsiana; Jessopp, Mark J.; Staniland, Iain J. orcid:0000-0003-2736-9134 . 2015 Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals. Animal Biotelemetry, 3 (1). 11, pp. https://doi.org/10.1186/s40317-015-0083-2 <https://doi.org/10.1186/s40317-015-0083-2> cc_by_4 CC-BY Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.1186/s40317-015-0083-2 2023-02-04T19:42:16Z 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 a total of 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 detected in a single image (n = 122 images, 28 videos). No predators other than conspecifics were detected. 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). Linear mixed models suggested a relationship between conspecific observations per dive and the number of krill images recorded per dive. In terms of bouts of dives, other seals were recorded in five single dives (of 330) and 28 bouts of dives <2 min apart (of 187). 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 either perpendicular or opposing each other at the bottom of dives, and in the same or opposite direction to 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Natural Environment Research Council: NERC Open Research Archive Antarctic Animal Biotelemetry 3 1 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
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 a total of 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 detected in a single image (n = 122 images, 28 videos). No predators other than conspecifics were detected. 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). Linear mixed models suggested a relationship between conspecific observations per dive and the number of krill images recorded per dive. In terms of bouts of dives, other seals were recorded in five single dives (of 330) and 28 bouts of dives <2 min apart (of 187). 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 either perpendicular or opposing each other at the bottom of dives, and in the same or opposite direction to 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 ... |
format |
Article in Journal/Newspaper |
author |
Hooker, Sascha K. Barychka, Tatsiana Jessopp, Mark J. Staniland, Iain J. |
spellingShingle |
Hooker, Sascha K. Barychka, Tatsiana Jessopp, Mark J. Staniland, Iain J. Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals |
author_facet |
Hooker, Sascha K. Barychka, Tatsiana Jessopp, Mark J. Staniland, Iain J. |
author_sort |
Hooker, Sascha K. |
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://nora.nerc.ac.uk/id/eprint/512013/ https://nora.nerc.ac.uk/id/eprint/512013/1/s40317-015-0083-2.pdf https://doi.org/10.1186/s40317-015-0083-2 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seals |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals |
op_relation |
https://nora.nerc.ac.uk/id/eprint/512013/1/s40317-015-0083-2.pdf Hooker, Sascha K.; Barychka, Tatsiana; Jessopp, Mark J.; Staniland, Iain J. orcid:0000-0003-2736-9134 . 2015 Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals. Animal Biotelemetry, 3 (1). 11, pp. https://doi.org/10.1186/s40317-015-0083-2 <https://doi.org/10.1186/s40317-015-0083-2> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s40317-015-0083-2 |
container_title |
Animal Biotelemetry |
container_volume |
3 |
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1 |
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1766251510843310080 |