Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming?
A central tenet of Antarctic ecology suggests that increases in Chinstrap Penguin (Pygoscelis antarctica) populations during the last four decades resulted from an increase in prey availability brought on by the decrease in baleen whale stocks. We question this tenet and present evidence to support...
Published in: | Polar Biology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
1992
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Online Access: | https://oceanrep.geomar.de/id/eprint/37950/ https://oceanrep.geomar.de/id/eprint/37950/1/2697.pdf https://doi.org/10.1007/BF00237945 |
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ftoceanrep:oai:oceanrep.geomar.de:37950 2023-05-15T13:30:38+02:00 Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? Fraser, William R. Trivelpiece, Wayne Z. Ainley, David G. Trivelpiece, Susan G. 1992 text https://oceanrep.geomar.de/id/eprint/37950/ https://oceanrep.geomar.de/id/eprint/37950/1/2697.pdf https://doi.org/10.1007/BF00237945 en eng Elsevier https://oceanrep.geomar.de/id/eprint/37950/1/2697.pdf Fraser, W. R., Trivelpiece, W. Z., Ainley, D. G. and Trivelpiece, S. G. (1992) Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming?. Polar Biology, 11 (8). pp. 525-531. DOI 10.1007/BF00237945 <https://doi.org/10.1007/BF00237945>. doi:10.1007/BF00237945 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1992 ftoceanrep https://doi.org/10.1007/BF00237945 2023-04-07T15:33:12Z A central tenet of Antarctic ecology suggests that increases in Chinstrap Penguin (Pygoscelis antarctica) populations during the last four decades resulted from an increase in prey availability brought on by the decrease in baleen whale stocks. We question this tenet and present evidence to support the hypothesis that these increases are due to a gradual decrease in the frequency of cold years with extensive winter sea ice cover resulting from environmental warming. Supporting data were derived from one of the first, major multidisciplinary winter expedition to the Scotia and Weddell seas; recent satellite images of ocean ice cover; and the analysis of long-term surface temperature records and penguin demography. Our observations indicate there is a need to pay close attention to environmental data in the management of Southern Ocean resources given the complexity of relating biological changes to ecological perturbations. Article in Journal/Newspaper Antarc* Antarctic Antarctica baleen whale Chinstrap penguin Polar Biology Pygoscelis antarctica Sea ice Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean Weddell Polar Biology 11 8 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A central tenet of Antarctic ecology suggests that increases in Chinstrap Penguin (Pygoscelis antarctica) populations during the last four decades resulted from an increase in prey availability brought on by the decrease in baleen whale stocks. We question this tenet and present evidence to support the hypothesis that these increases are due to a gradual decrease in the frequency of cold years with extensive winter sea ice cover resulting from environmental warming. Supporting data were derived from one of the first, major multidisciplinary winter expedition to the Scotia and Weddell seas; recent satellite images of ocean ice cover; and the analysis of long-term surface temperature records and penguin demography. Our observations indicate there is a need to pay close attention to environmental data in the management of Southern Ocean resources given the complexity of relating biological changes to ecological perturbations. |
format |
Article in Journal/Newspaper |
author |
Fraser, William R. Trivelpiece, Wayne Z. Ainley, David G. Trivelpiece, Susan G. |
spellingShingle |
Fraser, William R. Trivelpiece, Wayne Z. Ainley, David G. Trivelpiece, Susan G. Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
author_facet |
Fraser, William R. Trivelpiece, Wayne Z. Ainley, David G. Trivelpiece, Susan G. |
author_sort |
Fraser, William R. |
title |
Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
title_short |
Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
title_full |
Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
title_fullStr |
Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
title_full_unstemmed |
Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
title_sort |
increases in antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming? |
publisher |
Elsevier |
publishDate |
1992 |
url |
https://oceanrep.geomar.de/id/eprint/37950/ https://oceanrep.geomar.de/id/eprint/37950/1/2697.pdf https://doi.org/10.1007/BF00237945 |
geographic |
Antarctic Southern Ocean Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell |
genre |
Antarc* Antarctic Antarctica baleen whale Chinstrap penguin Polar Biology Pygoscelis antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica baleen whale Chinstrap penguin Polar Biology Pygoscelis antarctica Sea ice Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/37950/1/2697.pdf Fraser, W. R., Trivelpiece, W. Z., Ainley, D. G. and Trivelpiece, S. G. (1992) Increases in Antarctic penguin populations: reduced competition with whales or a loss of sea ice due to environmental warming?. Polar Biology, 11 (8). pp. 525-531. DOI 10.1007/BF00237945 <https://doi.org/10.1007/BF00237945>. doi:10.1007/BF00237945 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/BF00237945 |
container_title |
Polar Biology |
container_volume |
11 |
container_issue |
8 |
_version_ |
1766011019245649920 |