Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross
SYNOPSIS. The only apex predators that live year-round at high latitudes of the Ross Sea are the Weddell seal and emperor penguin. The seasonal distribution, foraging depths, and diet of these two species appear to overlap. What makes it possible for emperor penguins and Weddell seals to co-exist at...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.514.5541 2023-05-15T16:06:00+02:00 Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross Sea Antarctica Jennifer M. Burns Gerald L. Kooyman The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.5541 http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.5541 http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf text ftciteseerx 2016-01-08T09:48:36Z SYNOPSIS. The only apex predators that live year-round at high latitudes of the Ross Sea are the Weddell seal and emperor penguin. The seasonal distribution, foraging depths, and diet of these two species appear to overlap. What makes it possible for emperor penguins and Weddell seals to co-exist at high latitude throughout the winter when other marine tetrapods apparently cannot? Both spe-cies have similar adaptations for exploitation of the deep-water habitat, forage on the same species, and routinely make long and deep dives. Yet, despite these sim-ilarities, there is probably little trophic overlap between the adults of both species due to geographical and seasonal differences in habitat use. For example, during the winter months while female emperor penguins are ranging widely in the pack ice, adult seals are foraging and fattening for the upcoming summer fast, literally beneath the feet of the male penguins. However, there is more extensive overlap between juvenile seals and adult penguins, and shifts in prey abundance and/or distribution would likely affect these two groups similarly. In contrast, juvenile penguins appear to avoid inter- and intra- specific competition by leaving the Ross Sea once they molt. Text Emperor penguins Ross Sea Weddell Seal Weddell Seals Unknown Ross Sea Weddell |
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description |
SYNOPSIS. The only apex predators that live year-round at high latitudes of the Ross Sea are the Weddell seal and emperor penguin. The seasonal distribution, foraging depths, and diet of these two species appear to overlap. What makes it possible for emperor penguins and Weddell seals to co-exist at high latitude throughout the winter when other marine tetrapods apparently cannot? Both spe-cies have similar adaptations for exploitation of the deep-water habitat, forage on the same species, and routinely make long and deep dives. Yet, despite these sim-ilarities, there is probably little trophic overlap between the adults of both species due to geographical and seasonal differences in habitat use. For example, during the winter months while female emperor penguins are ranging widely in the pack ice, adult seals are foraging and fattening for the upcoming summer fast, literally beneath the feet of the male penguins. However, there is more extensive overlap between juvenile seals and adult penguins, and shifts in prey abundance and/or distribution would likely affect these two groups similarly. In contrast, juvenile penguins appear to avoid inter- and intra- specific competition by leaving the Ross Sea once they molt. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sea Antarctica Jennifer M. Burns Gerald L. Kooyman |
spellingShingle |
Sea Antarctica Jennifer M. Burns Gerald L. Kooyman Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
author_facet |
Sea Antarctica Jennifer M. Burns Gerald L. Kooyman |
author_sort |
Sea Antarctica |
title |
Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
title_short |
Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
title_full |
Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
title_fullStr |
Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
title_full_unstemmed |
Habitat Use by Weddell Seals and Emperor Penguins Foraging in the Ross |
title_sort |
habitat use by weddell seals and emperor penguins foraging in the ross |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.5541 http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf |
geographic |
Ross Sea Weddell |
geographic_facet |
Ross Sea Weddell |
genre |
Emperor penguins Ross Sea Weddell Seal Weddell Seals |
genre_facet |
Emperor penguins Ross Sea Weddell Seal Weddell Seals |
op_source |
http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.5541 http://hosting.uaa.alaska.edu/afjmb4/publications/rm2414.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766401904981573632 |