Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic
The diet of Antarctic fur seals ( Arctocephalus gazella ) at South Georgia is dominated by Antarctic krill ( Euphausia superba ). During the breeding season, foraging trips by lactating female fur seals are constrained by their need to return to land to provision their pups. Post-breeding, seals dis...
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Online Access: | http://dx.doi.org/10.1371/journal.pone.0248071 https://dx.plos.org/10.1371/journal.pone.0248071 |
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crplos:10.1371/journal.pone.0248071 2024-09-15T17:45:17+00:00 Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic Bamford, Connor C. G. Warwick-Evans, Victoria Staniland, Iain J. Jackson, Jennifer A. Trathan, Philip N. Hoskins, Andrew J. Natural Environment Research Council 2021 http://dx.doi.org/10.1371/journal.pone.0248071 https://dx.plos.org/10.1371/journal.pone.0248071 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 16, issue 3, page e0248071 ISSN 1932-6203 journal-article 2021 crplos https://doi.org/10.1371/journal.pone.0248071 2024-08-27T04:19:33Z The diet of Antarctic fur seals ( Arctocephalus gazella ) at South Georgia is dominated by Antarctic krill ( Euphausia superba ). During the breeding season, foraging trips by lactating female fur seals are constrained by their need to return to land to provision their pups. Post-breeding, seals disperse in order to feed and recover condition; estimates indicate c .70% of females remain near to South Georgia, whilst others head west towards the Patagonian Shelf or south to the ice-edge. The krill fishery at South Georgia operates only during the winter, providing the potential for fur seal: fishery interaction during these months. Here we use available winter (May to September) tracking data from Platform Terminal Transmitter (PTT) tags deployed on female fur seals at Bird Island, South Georgia. We develop habitat models describing their distribution during the winters of 1999 and 2003 with the aim of visualising and quantifying the degree of spatial overlap between female fur seals and krill harvesting in South Georgia waters. We show that spatial distribution of fur seals around South Georgia is extensive, and that the krill fishery overlaps with small, highly localised areas of available fur seal habitat. From these findings we discuss the implications for management, and future work. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Arctocephalus gazella Bird Island Euphausia superba PLOS PLOS ONE 16 3 e0248071 |
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crplos |
language |
English |
description |
The diet of Antarctic fur seals ( Arctocephalus gazella ) at South Georgia is dominated by Antarctic krill ( Euphausia superba ). During the breeding season, foraging trips by lactating female fur seals are constrained by their need to return to land to provision their pups. Post-breeding, seals disperse in order to feed and recover condition; estimates indicate c .70% of females remain near to South Georgia, whilst others head west towards the Patagonian Shelf or south to the ice-edge. The krill fishery at South Georgia operates only during the winter, providing the potential for fur seal: fishery interaction during these months. Here we use available winter (May to September) tracking data from Platform Terminal Transmitter (PTT) tags deployed on female fur seals at Bird Island, South Georgia. We develop habitat models describing their distribution during the winters of 1999 and 2003 with the aim of visualising and quantifying the degree of spatial overlap between female fur seals and krill harvesting in South Georgia waters. We show that spatial distribution of fur seals around South Georgia is extensive, and that the krill fishery overlaps with small, highly localised areas of available fur seal habitat. From these findings we discuss the implications for management, and future work. |
author2 |
Hoskins, Andrew J. Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Bamford, Connor C. G. Warwick-Evans, Victoria Staniland, Iain J. Jackson, Jennifer A. Trathan, Philip N. |
spellingShingle |
Bamford, Connor C. G. Warwick-Evans, Victoria Staniland, Iain J. Jackson, Jennifer A. Trathan, Philip N. Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
author_facet |
Bamford, Connor C. G. Warwick-Evans, Victoria Staniland, Iain J. Jackson, Jennifer A. Trathan, Philip N. |
author_sort |
Bamford, Connor C. G. |
title |
Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
title_short |
Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
title_full |
Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
title_fullStr |
Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
title_full_unstemmed |
Wintertime overlaps between female Antarctic fur seals (Arctocephalus gazella) and the krill fishery at South Georgia, South Atlantic |
title_sort |
wintertime overlaps between female antarctic fur seals (arctocephalus gazella) and the krill fishery at south georgia, south atlantic |
publisher |
Public Library of Science (PLoS) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1371/journal.pone.0248071 https://dx.plos.org/10.1371/journal.pone.0248071 |
genre |
Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Arctocephalus gazella Bird Island Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Arctocephalus gazella Bird Island Euphausia superba |
op_source |
PLOS ONE volume 16, issue 3, page e0248071 ISSN 1932-6203 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0248071 |
container_title |
PLOS ONE |
container_volume |
16 |
container_issue |
3 |
container_start_page |
e0248071 |
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1810493048027611136 |