Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis )
Parameter estimates reflecting age-specific growth of Subantarctic fur seals (Arctocephalus tropicalis) on Gough Island were fitted to three sigmoidal (Gompertz, logistic, and von Bertalanffy) growth curves. With a few exceptions, the logistic fit provided the best mathematical approximation of post...
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1994
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crcansciencepubl:10.1139/z94-150 2024-03-03T08:36:35+00:00 Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) Bester, Marthán N. Jaarsveld, Albert S. Van 1994 http://dx.doi.org/10.1139/z94-150 http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-150 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 72, issue 6, page 1126-1133 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1994 crcansciencepubl https://doi.org/10.1139/z94-150 2024-02-07T10:53:36Z Parameter estimates reflecting age-specific growth of Subantarctic fur seals (Arctocephalus tropicalis) on Gough Island were fitted to three sigmoidal (Gompertz, logistic, and von Bertalanffy) growth curves. With a few exceptions, the logistic fit provided the best mathematical approximation of postnatal growth in fur seals from Gough Island, although all fits were significant. Standard length is a better reflection of age-specific changes in size than mass, which displayed considerable variance. Growth was characterized by marked sexual dimorphism. Interisland comparisons of body size from throughout the geographic range of the species suggested a latitudinal graded difference in adult body size, with the largest animals occurring at low-latitude Amsterdam Island and the smallest at Marion Island, which lies just north of the Antarctic Polar Front. These growth and body-size estimates can be used for monitoring the effects of population or ecosystem changes on fur seal productivity, but significant standardization of data collection procedures need to be introduced. Article in Journal/Newspaper Amsterdam Island Antarc* Antarctic Marion Island Canadian Science Publishing Antarctic The Antarctic Gough ENVELOPE(159.367,159.367,-81.633,-81.633) Canadian Journal of Zoology 72 6 1126 1133 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Bester, Marthán N. Jaarsveld, Albert S. Van Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Parameter estimates reflecting age-specific growth of Subantarctic fur seals (Arctocephalus tropicalis) on Gough Island were fitted to three sigmoidal (Gompertz, logistic, and von Bertalanffy) growth curves. With a few exceptions, the logistic fit provided the best mathematical approximation of postnatal growth in fur seals from Gough Island, although all fits were significant. Standard length is a better reflection of age-specific changes in size than mass, which displayed considerable variance. Growth was characterized by marked sexual dimorphism. Interisland comparisons of body size from throughout the geographic range of the species suggested a latitudinal graded difference in adult body size, with the largest animals occurring at low-latitude Amsterdam Island and the smallest at Marion Island, which lies just north of the Antarctic Polar Front. These growth and body-size estimates can be used for monitoring the effects of population or ecosystem changes on fur seal productivity, but significant standardization of data collection procedures need to be introduced. |
format |
Article in Journal/Newspaper |
author |
Bester, Marthán N. Jaarsveld, Albert S. Van |
author_facet |
Bester, Marthán N. Jaarsveld, Albert S. Van |
author_sort |
Bester, Marthán N. |
title |
Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
title_short |
Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
title_full |
Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
title_fullStr |
Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
title_full_unstemmed |
Sex-specific and latitudinal variance in postnatal growth of the Subantarctic fur seal ( Arctocephalus tropicalis ) |
title_sort |
sex-specific and latitudinal variance in postnatal growth of the subantarctic fur seal ( arctocephalus tropicalis ) |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/z94-150 http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-150 |
long_lat |
ENVELOPE(159.367,159.367,-81.633,-81.633) |
geographic |
Antarctic The Antarctic Gough |
geographic_facet |
Antarctic The Antarctic Gough |
genre |
Amsterdam Island Antarc* Antarctic Marion Island |
genre_facet |
Amsterdam Island Antarc* Antarctic Marion Island |
op_source |
Canadian Journal of Zoology volume 72, issue 6, page 1126-1133 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z94-150 |
container_title |
Canadian Journal of Zoology |
container_volume |
72 |
container_issue |
6 |
container_start_page |
1126 |
op_container_end_page |
1133 |
_version_ |
1792494321821286400 |