Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal
Many species have been heavily exploited by man leading to local extirpations, yet few studies have attempted to unravel subsequent recolonization histories. This has led to a significant gap in our knowledge of the long-term effects of exploitation on the amount and structure of contemporary geneti...
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Language: | English |
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ftcdlib:qt1mn5t2wv 2023-05-15T13:50:53+02:00 Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal Bonin, CA Goebel, ME Forcada, J Burton, RS Hoffman, JI 3701 - 3712 2013-10-01 application/pdf http://www.escholarship.org/uc/item/1mn5t2wv english eng eScholarship, University of California qt1mn5t2wv http://www.escholarship.org/uc/item/1mn5t2wv public Bonin, CA; Goebel, ME; Forcada, J; Burton, RS; & Hoffman, JI. (2013). Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal. Ecology and Evolution, 3(11), 3701 - 3712. doi:10.1002/ece3.732. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/1mn5t2wv article 2013 ftcdlib https://doi.org/10.1002/ece3.732 2018-07-13T22:53:39Z Many species have been heavily exploited by man leading to local extirpations, yet few studies have attempted to unravel subsequent recolonization histories. This has led to a significant gap in our knowledge of the long-term effects of exploitation on the amount and structure of contemporary genetic variation, with important implications for conservation. The Antarctic fur seal provides an interesting case in point, having been virtually exterminated in the nineteenth century but subsequently staged a dramatic recovery to recolonize much of its original range. Consequently, we evaluated the hypothesis that South Georgia (SG), where a few million seals currently breed, was the main source of immigrants to other locations including Livingston Island (LI), by genotyping 366 individuals from these two populations at 17 microsatellite loci and sequencing a 263 bp fragment of the mitochondrial hypervariable region 1. Contrary to expectations, we found highly significant genetic differences at both types of marker, with 51% of LI individuals carrying haplotypes that were not observed in 246 animals from SG. Moreover, the youngest of three sequentially founded colonies at LI showed greater similarity to SG at mitochondrial DNA than microsatellites, implying temporal and sex-specific variation in recolonization. Our findings emphasize the importance of relict populations and provide insights into the mechanisms by which severely depleted populations can recover while maintaining surprisingly high levels of genetic diversity. © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Livingston Island University of California: eScholarship Antarctic Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) The Antarctic Ecology and Evolution 3 11 3701 3712 |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Many species have been heavily exploited by man leading to local extirpations, yet few studies have attempted to unravel subsequent recolonization histories. This has led to a significant gap in our knowledge of the long-term effects of exploitation on the amount and structure of contemporary genetic variation, with important implications for conservation. The Antarctic fur seal provides an interesting case in point, having been virtually exterminated in the nineteenth century but subsequently staged a dramatic recovery to recolonize much of its original range. Consequently, we evaluated the hypothesis that South Georgia (SG), where a few million seals currently breed, was the main source of immigrants to other locations including Livingston Island (LI), by genotyping 366 individuals from these two populations at 17 microsatellite loci and sequencing a 263 bp fragment of the mitochondrial hypervariable region 1. Contrary to expectations, we found highly significant genetic differences at both types of marker, with 51% of LI individuals carrying haplotypes that were not observed in 246 animals from SG. Moreover, the youngest of three sequentially founded colonies at LI showed greater similarity to SG at mitochondrial DNA than microsatellites, implying temporal and sex-specific variation in recolonization. Our findings emphasize the importance of relict populations and provide insights into the mechanisms by which severely depleted populations can recover while maintaining surprisingly high levels of genetic diversity. © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. |
format |
Article in Journal/Newspaper |
author |
Bonin, CA Goebel, ME Forcada, J Burton, RS Hoffman, JI |
spellingShingle |
Bonin, CA Goebel, ME Forcada, J Burton, RS Hoffman, JI Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
author_facet |
Bonin, CA Goebel, ME Forcada, J Burton, RS Hoffman, JI |
author_sort |
Bonin, CA |
title |
Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
title_short |
Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
title_full |
Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
title_fullStr |
Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
title_full_unstemmed |
Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
title_sort |
unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal |
publisher |
eScholarship, University of California |
publishDate |
2013 |
url |
http://www.escholarship.org/uc/item/1mn5t2wv |
op_coverage |
3701 - 3712 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Livingston Island The Antarctic |
geographic_facet |
Antarctic Livingston Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Livingston Island |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Livingston Island |
op_source |
Bonin, CA; Goebel, ME; Forcada, J; Burton, RS; & Hoffman, JI. (2013). Unexpected genetic differentiation between recently recolonized populations of a long-lived and highly vagile marine mammal. Ecology and Evolution, 3(11), 3701 - 3712. doi:10.1002/ece3.732. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/1mn5t2wv |
op_relation |
qt1mn5t2wv http://www.escholarship.org/uc/item/1mn5t2wv |
op_rights |
public |
op_doi |
https://doi.org/10.1002/ece3.732 |
container_title |
Ecology and Evolution |
container_volume |
3 |
container_issue |
11 |
container_start_page |
3701 |
op_container_end_page |
3712 |
_version_ |
1766254259542687744 |