A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal
Evaluating how populations are connected by migration is important for understanding species resilience because gene flow can facilitate recovery from demographic declines. We therefore investigated the extent to which migration may have contributed to the global recovery of the Antarctic fur seal (...
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Online Access: | https://doi.org/10.1098/rsos.181227 https://doaj.org/article/cd61ee70b9f049c5893173cd3feac14a |
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ftdoajarticles:oai:doaj.org/article:cd61ee70b9f049c5893173cd3feac14a 2023-05-15T14:04:44+02:00 A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal J. I. Hoffman E. Bauer A. J. Paijmans E. Humble L. M. Beckmann C. Kubetschek F. Christaller N. Kröcker B. Fuchs A. Moreras Y. D. Shihlomule M. N. Bester A. C. Cleary P. J. N. De Bruyn J. Forcada M. E. Goebel S. D. Goldsworthy C. Guinet A. R. Hoelzel C. Lydersen K. M. Kovacs A. Lowther 2018-01-01T00:00:00Z https://doi.org/10.1098/rsos.181227 https://doaj.org/article/cd61ee70b9f049c5893173cd3feac14a EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181227 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.181227 https://doaj.org/article/cd61ee70b9f049c5893173cd3feac14a Royal Society Open Science, Vol 5, Iss 10 (2018) colour polymorphism melanocortin 1 receptor gene population structure fur seal pinniped Science Q article 2018 ftdoajarticles https://doi.org/10.1098/rsos.181227 2022-12-31T03:20:10Z Evaluating how populations are connected by migration is important for understanding species resilience because gene flow can facilitate recovery from demographic declines. We therefore investigated the extent to which migration may have contributed to the global recovery of the Antarctic fur seal (Arctocephalus gazella), a circumpolar distributed marine mammal that was brought to the brink of extinction by the sealing industry in the eighteenth and nineteenth centuries. It is widely believed that animals emigrating from South Georgia, where a relict population escaped sealing, contributed to the re-establishment of formerly occupied breeding colonies across the geographical range of the species. To investigate this, we interrogated a genetic polymorphism (S291F) in the melanocortin 1 receptor gene, which is responsible for a cream-coloured phenotype that is relatively abundant at South Georgia and which appears to have recently spread to localities as far afield as Marion Island in the sub-Antarctic Indian Ocean. By sequencing a short region of this gene in 1492 pups from eight breeding colonies, we showed that S291F frequency rapidly declines with increasing geographical distance from South Georgia, consistent with locally restricted gene flow from South Georgia mainly to the South Shetland Islands and Bouvetøya. The S291F allele was not detected farther afield, suggesting that although emigrants from South Georgia may have been locally important, they are unlikely to have played a major role in the recovery of geographically more distant populations. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bouvetøya Marion Island South Shetland Islands Directory of Open Access Journals: DOAJ Articles Antarctic Bouvetøya ENVELOPE(3.358,3.358,-54.422,-54.422) Indian South Shetland Islands The Antarctic Royal Society Open Science 5 10 181227 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
colour polymorphism melanocortin 1 receptor gene population structure fur seal pinniped Science Q |
spellingShingle |
colour polymorphism melanocortin 1 receptor gene population structure fur seal pinniped Science Q J. I. Hoffman E. Bauer A. J. Paijmans E. Humble L. M. Beckmann C. Kubetschek F. Christaller N. Kröcker B. Fuchs A. Moreras Y. D. Shihlomule M. N. Bester A. C. Cleary P. J. N. De Bruyn J. Forcada M. E. Goebel S. D. Goldsworthy C. Guinet A. R. Hoelzel C. Lydersen K. M. Kovacs A. Lowther A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
topic_facet |
colour polymorphism melanocortin 1 receptor gene population structure fur seal pinniped Science Q |
description |
Evaluating how populations are connected by migration is important for understanding species resilience because gene flow can facilitate recovery from demographic declines. We therefore investigated the extent to which migration may have contributed to the global recovery of the Antarctic fur seal (Arctocephalus gazella), a circumpolar distributed marine mammal that was brought to the brink of extinction by the sealing industry in the eighteenth and nineteenth centuries. It is widely believed that animals emigrating from South Georgia, where a relict population escaped sealing, contributed to the re-establishment of formerly occupied breeding colonies across the geographical range of the species. To investigate this, we interrogated a genetic polymorphism (S291F) in the melanocortin 1 receptor gene, which is responsible for a cream-coloured phenotype that is relatively abundant at South Georgia and which appears to have recently spread to localities as far afield as Marion Island in the sub-Antarctic Indian Ocean. By sequencing a short region of this gene in 1492 pups from eight breeding colonies, we showed that S291F frequency rapidly declines with increasing geographical distance from South Georgia, consistent with locally restricted gene flow from South Georgia mainly to the South Shetland Islands and Bouvetøya. The S291F allele was not detected farther afield, suggesting that although emigrants from South Georgia may have been locally important, they are unlikely to have played a major role in the recovery of geographically more distant populations. |
format |
Article in Journal/Newspaper |
author |
J. I. Hoffman E. Bauer A. J. Paijmans E. Humble L. M. Beckmann C. Kubetschek F. Christaller N. Kröcker B. Fuchs A. Moreras Y. D. Shihlomule M. N. Bester A. C. Cleary P. J. N. De Bruyn J. Forcada M. E. Goebel S. D. Goldsworthy C. Guinet A. R. Hoelzel C. Lydersen K. M. Kovacs A. Lowther |
author_facet |
J. I. Hoffman E. Bauer A. J. Paijmans E. Humble L. M. Beckmann C. Kubetschek F. Christaller N. Kröcker B. Fuchs A. Moreras Y. D. Shihlomule M. N. Bester A. C. Cleary P. J. N. De Bruyn J. Forcada M. E. Goebel S. D. Goldsworthy C. Guinet A. R. Hoelzel C. Lydersen K. M. Kovacs A. Lowther |
author_sort |
J. I. Hoffman |
title |
A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
title_short |
A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
title_full |
A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
title_fullStr |
A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
title_full_unstemmed |
A global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
title_sort |
global cline in a colour polymorphism suggests a limited contribution of gene flow towards the recovery of a heavily exploited marine mammal |
publisher |
The Royal Society |
publishDate |
2018 |
url |
https://doi.org/10.1098/rsos.181227 https://doaj.org/article/cd61ee70b9f049c5893173cd3feac14a |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) |
geographic |
Antarctic Bouvetøya Indian South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Bouvetøya Indian South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bouvetøya Marion Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella Bouvetøya Marion Island South Shetland Islands |
op_source |
Royal Society Open Science, Vol 5, Iss 10 (2018) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181227 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.181227 https://doaj.org/article/cd61ee70b9f049c5893173cd3feac14a |
op_doi |
https://doi.org/10.1098/rsos.181227 |
container_title |
Royal Society Open Science |
container_volume |
5 |
container_issue |
10 |
container_start_page |
181227 |
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1766275995680112640 |