Growth of a fur seal population
The Antarctic fur seal Arctocephalus gazella is a polygynous Otarid in which a single pup is produced annually by cows over the age of 2 years. Following exploitation to the verge of extinction, a small breeding colony was discovered at Bird Island, South Georgia, in the 1930s. Up to 10000 pups a ye...
Published in: | Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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Language: | English |
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1977
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Online Access: | http://dx.doi.org/10.1098/rstb.1977.0072 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0072 |
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crroyalsociety:10.1098/rstb.1977.0072 2024-06-02T07:56:51+00:00 Growth of a fur seal population 1977 http://dx.doi.org/10.1098/rstb.1977.0072 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0072 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 279, issue 963, page 67-79 ISSN 0080-4622 2054-0280 journal-article 1977 crroyalsociety https://doi.org/10.1098/rstb.1977.0072 2024-05-07T14:16:10Z The Antarctic fur seal Arctocephalus gazella is a polygynous Otarid in which a single pup is produced annually by cows over the age of 2 years. Following exploitation to the verge of extinction, a small breeding colony was discovered at Bird Island, South Georgia, in the 1930s. Up to 10000 pups a year were produced in the early 1960s and by 1975 the figure had reached an estimated 90000. The rapid population increase has resulted in the colonization of extensive breeding areas on the adjacent mainland of South Georgia with incipient colonies springing up on more distant parts of the island, and also in the South Sandwich, South Orkney and South Shetland Islands. Age determinations from the teeth of 195 breeding cows reveal a low mean age, early first breeding and a predominance of the younger age groups relative to the age structure of a stable population of northern fur seals Callorhinus ursinus . Annual adult cow survival is estimated at 89.8%, while that of first-year animals is about 64.5%. A decline in the rate of population increase is forecast within ten years and an outline for investigating the most likely factors influencing such a change is suggested. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bird Island South Shetland Islands Callorhinus ursinus The Royal Society Antarctic Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) South Shetland Islands The Antarctic Philosophical Transactions of the Royal Society of London. B, Biological Sciences 279 963 67 79 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
The Antarctic fur seal Arctocephalus gazella is a polygynous Otarid in which a single pup is produced annually by cows over the age of 2 years. Following exploitation to the verge of extinction, a small breeding colony was discovered at Bird Island, South Georgia, in the 1930s. Up to 10000 pups a year were produced in the early 1960s and by 1975 the figure had reached an estimated 90000. The rapid population increase has resulted in the colonization of extensive breeding areas on the adjacent mainland of South Georgia with incipient colonies springing up on more distant parts of the island, and also in the South Sandwich, South Orkney and South Shetland Islands. Age determinations from the teeth of 195 breeding cows reveal a low mean age, early first breeding and a predominance of the younger age groups relative to the age structure of a stable population of northern fur seals Callorhinus ursinus . Annual adult cow survival is estimated at 89.8%, while that of first-year animals is about 64.5%. A decline in the rate of population increase is forecast within ten years and an outline for investigating the most likely factors influencing such a change is suggested. |
format |
Article in Journal/Newspaper |
title |
Growth of a fur seal population |
spellingShingle |
Growth of a fur seal population |
title_short |
Growth of a fur seal population |
title_full |
Growth of a fur seal population |
title_fullStr |
Growth of a fur seal population |
title_full_unstemmed |
Growth of a fur seal population |
title_sort |
growth of a fur seal population |
publisher |
The Royal Society |
publishDate |
1977 |
url |
http://dx.doi.org/10.1098/rstb.1977.0072 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0072 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Antarctic Bird Island South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Bird Island South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bird Island South Shetland Islands Callorhinus ursinus |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bird Island South Shetland Islands Callorhinus ursinus |
op_source |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 279, issue 963, page 67-79 ISSN 0080-4622 2054-0280 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1977.0072 |
container_title |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
container_volume |
279 |
container_issue |
963 |
container_start_page |
67 |
op_container_end_page |
79 |
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