Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus)
Central place foraging by colonial breeders can lead to depleted prey resources around breeding areas. Segregation of foraging areas both within and between large colonies may act as a mechanism to reduce competition for prey resulting in increased foraging success. We reassessed horizontal (spatial...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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2014
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Online Access: | http://dx.doi.org/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0087 |
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crcansciencepubl:10.1139/cjz-2014-0087 2024-09-15T18:41:29+00:00 Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) Kuhn, C.E. Ream, R.R. Sterling, J.T. Thomason, J.R. Towell, R.G. 2014 http://dx.doi.org/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 92, issue 10, page 861-873 ISSN 0008-4301 1480-3283 journal-article 2014 crcansciencepubl https://doi.org/10.1139/cjz-2014-0087 2024-08-01T04:10:02Z Central place foraging by colonial breeders can lead to depleted prey resources around breeding areas. Segregation of foraging areas both within and between large colonies may act as a mechanism to reduce competition for prey resulting in increased foraging success. We reassessed horizontal (spatial) foraging habitat segregation for northern fur seals (Callorhinus ursinus (L., 1758)) within and between colonies on the Pribilof Islands, Alaska (St. Paul and St. George islands), after the population declined by approximately 40%. Additionally, we examined vertical habitat segregation, where foraging ranges overlapped, and describe the influence of different foraging habitats on northern fur seal dive behavior. Spatial habitat segregation in northern fur seal foraging areas occurred between islands but was variable within islands, which is similar to the pattern previously described. There was no evidence for vertical habitat segregation when fur seals from different rookeries on St. George Island used the same foraging area. Additionally, fur seals from St. Paul Island rookeries that foraged in similar habitats showed fewer differences in dive behavior, indicating that foraging habitat plays a significant role in shaping dive behavior. The use of multiple foraging strategies within the Pribilof Island fur seal population could indicate that a complex management and conservation strategy may be necessary to stop the continuing decline of this population. Article in Journal/Newspaper Alaska Callorhinus ursinus Northern fur seal Canadian Science Publishing Canadian Journal of Zoology 92 10 861 873 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Central place foraging by colonial breeders can lead to depleted prey resources around breeding areas. Segregation of foraging areas both within and between large colonies may act as a mechanism to reduce competition for prey resulting in increased foraging success. We reassessed horizontal (spatial) foraging habitat segregation for northern fur seals (Callorhinus ursinus (L., 1758)) within and between colonies on the Pribilof Islands, Alaska (St. Paul and St. George islands), after the population declined by approximately 40%. Additionally, we examined vertical habitat segregation, where foraging ranges overlapped, and describe the influence of different foraging habitats on northern fur seal dive behavior. Spatial habitat segregation in northern fur seal foraging areas occurred between islands but was variable within islands, which is similar to the pattern previously described. There was no evidence for vertical habitat segregation when fur seals from different rookeries on St. George Island used the same foraging area. Additionally, fur seals from St. Paul Island rookeries that foraged in similar habitats showed fewer differences in dive behavior, indicating that foraging habitat plays a significant role in shaping dive behavior. The use of multiple foraging strategies within the Pribilof Island fur seal population could indicate that a complex management and conservation strategy may be necessary to stop the continuing decline of this population. |
format |
Article in Journal/Newspaper |
author |
Kuhn, C.E. Ream, R.R. Sterling, J.T. Thomason, J.R. Towell, R.G. |
spellingShingle |
Kuhn, C.E. Ream, R.R. Sterling, J.T. Thomason, J.R. Towell, R.G. Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
author_facet |
Kuhn, C.E. Ream, R.R. Sterling, J.T. Thomason, J.R. Towell, R.G. |
author_sort |
Kuhn, C.E. |
title |
Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
title_short |
Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
title_full |
Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
title_fullStr |
Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
title_full_unstemmed |
Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( Callorhinus ursinus) |
title_sort |
spatial segregation and the influence of habitat on the foraging behavior of northern fur seals ( callorhinus ursinus) |
publisher |
Canadian Science Publishing |
publishDate |
2014 |
url |
http://dx.doi.org/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0087 |
genre |
Alaska Callorhinus ursinus Northern fur seal |
genre_facet |
Alaska Callorhinus ursinus Northern fur seal |
op_source |
Canadian Journal of Zoology volume 92, issue 10, page 861-873 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2014-0087 |
container_title |
Canadian Journal of Zoology |
container_volume |
92 |
container_issue |
10 |
container_start_page |
861 |
op_container_end_page |
873 |
_version_ |
1810485893781258240 |