Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia
Large numbers of pups of the Antarctic fur seal were weighed at regular intervals through their rearing period in six seasons between 1972 and 1981 at South Georgia. Growth rates and birth and weaning weights were estimated from linear regressions of mean weight on mean age. Female pups had signific...
Published in: | Journal of Zoology |
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Language: | English |
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1984
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Online Access: | http://dx.doi.org/10.1111/j.1469-7998.1984.tb06045.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1984.tb06045.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x |
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crwiley:10.1111/j.1469-7998.1984.tb06045.x 2024-06-02T07:57:17+00:00 Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia Doidge, D. W. Croxall, J. P. Ricketts, C. 1984 http://dx.doi.org/10.1111/j.1469-7998.1984.tb06045.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1984.tb06045.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 203, issue 1, page 87-93 ISSN 0952-8369 1469-7998 journal-article 1984 crwiley https://doi.org/10.1111/j.1469-7998.1984.tb06045.x 2024-05-03T11:25:49Z Large numbers of pups of the Antarctic fur seal were weighed at regular intervals through their rearing period in six seasons between 1972 and 1981 at South Georgia. Growth rates and birth and weaning weights were estimated from linear regressions of mean weight on mean age. Female pups had significantly lower growth rates and weaning weights than males, but higher variances for all growth parameters. This may reflect the importance to males of polygynous species of attaining high body weight. Except for an inverse relation between growth rate and birth weight there were no systematic relationships between growth parameters. Seasonal differences in growth rates were substantial and there was no indication that the continuing rapid population increase was affecting pup growth rates. The use of these data in detecting seasonal variations in local food availability is discussed. Preliminary estimates of the energy costs of pup rearing indicate that pup existence metabolism consumes c. 80% and mass gain to weaning only c. 15% of the energy provided by the female. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Wiley Online Library Antarctic The Antarctic Journal of Zoology 203 1 87 93 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Large numbers of pups of the Antarctic fur seal were weighed at regular intervals through their rearing period in six seasons between 1972 and 1981 at South Georgia. Growth rates and birth and weaning weights were estimated from linear regressions of mean weight on mean age. Female pups had significantly lower growth rates and weaning weights than males, but higher variances for all growth parameters. This may reflect the importance to males of polygynous species of attaining high body weight. Except for an inverse relation between growth rate and birth weight there were no systematic relationships between growth parameters. Seasonal differences in growth rates were substantial and there was no indication that the continuing rapid population increase was affecting pup growth rates. The use of these data in detecting seasonal variations in local food availability is discussed. Preliminary estimates of the energy costs of pup rearing indicate that pup existence metabolism consumes c. 80% and mass gain to weaning only c. 15% of the energy provided by the female. |
format |
Article in Journal/Newspaper |
author |
Doidge, D. W. Croxall, J. P. Ricketts, C. |
spellingShingle |
Doidge, D. W. Croxall, J. P. Ricketts, C. Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
author_facet |
Doidge, D. W. Croxall, J. P. Ricketts, C. |
author_sort |
Doidge, D. W. |
title |
Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
title_short |
Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
title_full |
Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
title_fullStr |
Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
title_full_unstemmed |
Growth rates of Antarctic fur seal Arctocephalus gazella pups at South Georgia |
title_sort |
growth rates of antarctic fur seal arctocephalus gazella pups at south georgia |
publisher |
Wiley |
publishDate |
1984 |
url |
http://dx.doi.org/10.1111/j.1469-7998.1984.tb06045.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1984.tb06045.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1984.tb06045.x |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella |
op_source |
Journal of Zoology volume 203, issue 1, page 87-93 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1469-7998.1984.tb06045.x |
container_title |
Journal of Zoology |
container_volume |
203 |
container_issue |
1 |
container_start_page |
87 |
op_container_end_page |
93 |
_version_ |
1800740432423944192 |