Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ...
This study tested hypotheses relating the foraging trip durations of lactating female Antarctic fur seals, to the abundance and availability of Antarctic krill, where the mean length of krill consumed is used a proxy of krill availability. Over six years, 1568 foraging trips were measured for 178 in...
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Online Access: | https://dx.doi.org/10.17863/cam.39798 https://www.repository.cam.ac.uk/handle/1810/292642 |
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ftdatacite:10.17863/cam.39798 2024-02-04T09:55:26+01:00 Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... Robinson, Sarah 2002 https://dx.doi.org/10.17863/cam.39798 https://www.repository.cam.ac.uk/handle/1810/292642 en eng Apollo - University of Cambridge Repository open.access All Rights Reserved http://www.rioxx.net/licenses/all-rights-reserved/ http://purl.org/coar/access_right/c_abf2 Dissertation Thesis thesis 2002 ftdatacite https://doi.org/10.17863/cam.39798 2024-01-05T14:28:33Z This study tested hypotheses relating the foraging trip durations of lactating female Antarctic fur seals, to the abundance and availability of Antarctic krill, where the mean length of krill consumed is used a proxy of krill availability. Over six years, 1568 foraging trips were measured for 178 individual seals, foraging from Bird Island, South Georgia. The relationships between the duration of these trips and the mean length of krill, derived from scat samples, was then investigated. This study has shown large-scale changes in the krill population around South Georgia are easily detected in the foraging trip duration of female lactating Antarctic fur seals. The study found a positive correlation between foraging trip duration and the krill length, suggesting that longer trips, reflecting lower krill availability, are associated with a greater mean size of krill. This study illustrates the important potential for predators, specifically female Antarctic fur seals, as samplers of a highly variable marine ... Thesis Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Bird Island DataCite Metadata Store (German National Library of Science and Technology) Antarctic Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
This study tested hypotheses relating the foraging trip durations of lactating female Antarctic fur seals, to the abundance and availability of Antarctic krill, where the mean length of krill consumed is used a proxy of krill availability. Over six years, 1568 foraging trips were measured for 178 individual seals, foraging from Bird Island, South Georgia. The relationships between the duration of these trips and the mean length of krill, derived from scat samples, was then investigated. This study has shown large-scale changes in the krill population around South Georgia are easily detected in the foraging trip duration of female lactating Antarctic fur seals. The study found a positive correlation between foraging trip duration and the krill length, suggesting that longer trips, reflecting lower krill availability, are associated with a greater mean size of krill. This study illustrates the important potential for predators, specifically female Antarctic fur seals, as samplers of a highly variable marine ... |
format |
Thesis |
author |
Robinson, Sarah |
spellingShingle |
Robinson, Sarah Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
author_facet |
Robinson, Sarah |
author_sort |
Robinson, Sarah |
title |
Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
title_short |
Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
title_full |
Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
title_fullStr |
Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
title_full_unstemmed |
Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems ... |
title_sort |
linked changes in prey availability and population structure: using antarctic fur seals to sample marine systems ... |
publisher |
Apollo - University of Cambridge Repository |
publishDate |
2002 |
url |
https://dx.doi.org/10.17863/cam.39798 https://www.repository.cam.ac.uk/handle/1810/292642 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Antarctic Bird Island |
geographic_facet |
Antarctic Bird Island |
genre |
Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Bird Island |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Antarctic Krill Bird Island |
op_rights |
open.access All Rights Reserved http://www.rioxx.net/licenses/all-rights-reserved/ http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.17863/cam.39798 |
_version_ |
1789959404420857856 |