Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands
Skull morphometrics of two populations of Subantarctic fur seal (Arctocephalus tropicalis) were compared in order to identify possible geographic variation as an indicator of gene flow between the populations, as well as a potential tool to identify the source of vagrant seals. Nineteen metric varia...
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ftjafricanj:oai:ojs.ajol.info:article/155199 2023-05-15T17:10:20+02:00 Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands Kerley, Graham I.H. Allen, Bryce R. Bester, Marthán N. 2017-04-24 application/pdf https://www.ajol.info/index.php/az/article/view/155199 eng eng NISC (Pty) Ltd https://www.ajol.info/index.php/az/article/view/155199/144814 https://www.ajol.info/index.php/az/article/view/155199 The copyright belongs to the Zoological Society of Southern Africa. African Zoology; Vol 35, No 2 (2000); 165-171 2224-073X 1562-7020 cranial characteristics population gene flow info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2017 ftjafricanj 2017-04-29T23:57:22Z Skull morphometrics of two populations of Subantarctic fur seal (Arctocephalus tropicalis) were compared in order to identify possible geographic variation as an indicator of gene flow between the populations, as well as a potential tool to identify the source of vagrant seals. Nineteen metric variables were recorded from skulls of adult male seals from Marion Island (n=31) and Gough Island (n=41). Comparative univariate and multivariate statistical analyses conducted on the two population samples included standard statistics (mean, standard deviation, coefficient of variation, range), multivariate analysis of variance, stepwise discriminant function analysis, cluster analysis and principal component analysis. No significant separation between the two island groups, based on cranial characteristics of adult males, was found. These findings suggest that gene flow is occurring between these populations.We conclude that skull morphometrics cannot be used to identify the origins of vagrant Subantarcticfur seals.Key words: cranial characteristics, population gene flow. Article in Journal/Newspaper Marion Island AJOL - African Journals Online Gough ENVELOPE(159.367,159.367,-81.633,-81.633) |
institution |
Open Polar |
collection |
AJOL - African Journals Online |
op_collection_id |
ftjafricanj |
language |
English |
topic |
cranial characteristics population gene flow |
spellingShingle |
cranial characteristics population gene flow Kerley, Graham I.H. Allen, Bryce R. Bester, Marthán N. Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
topic_facet |
cranial characteristics population gene flow |
description |
Skull morphometrics of two populations of Subantarctic fur seal (Arctocephalus tropicalis) were compared in order to identify possible geographic variation as an indicator of gene flow between the populations, as well as a potential tool to identify the source of vagrant seals. Nineteen metric variables were recorded from skulls of adult male seals from Marion Island (n=31) and Gough Island (n=41). Comparative univariate and multivariate statistical analyses conducted on the two population samples included standard statistics (mean, standard deviation, coefficient of variation, range), multivariate analysis of variance, stepwise discriminant function analysis, cluster analysis and principal component analysis. No significant separation between the two island groups, based on cranial characteristics of adult males, was found. These findings suggest that gene flow is occurring between these populations.We conclude that skull morphometrics cannot be used to identify the origins of vagrant Subantarcticfur seals.Key words: cranial characteristics, population gene flow. |
format |
Article in Journal/Newspaper |
author |
Kerley, Graham I.H. Allen, Bryce R. Bester, Marthán N. |
author_facet |
Kerley, Graham I.H. Allen, Bryce R. Bester, Marthán N. |
author_sort |
Kerley, Graham I.H. |
title |
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
title_short |
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
title_full |
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
title_fullStr |
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
title_full_unstemmed |
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands |
title_sort |
skull morphometrics of male subantarctic fur seals (arctocephalus tropicalis) from marion and gough islands |
publisher |
NISC (Pty) Ltd |
publishDate |
2017 |
url |
https://www.ajol.info/index.php/az/article/view/155199 |
long_lat |
ENVELOPE(159.367,159.367,-81.633,-81.633) |
geographic |
Gough |
geographic_facet |
Gough |
genre |
Marion Island |
genre_facet |
Marion Island |
op_source |
African Zoology; Vol 35, No 2 (2000); 165-171 2224-073X 1562-7020 |
op_relation |
https://www.ajol.info/index.php/az/article/view/155199/144814 https://www.ajol.info/index.php/az/article/view/155199 |
op_rights |
The copyright belongs to the Zoological Society of Southern Africa. |
_version_ |
1766066929518247936 |