Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula
Long-term monitoring of seabird numbers around Antarctica has revealed that the chinstrap penguin (Pygoscelis antarctica) is largely declining throughout its range in the Scotia Arc. Whether archipelagos across this large area remain connected via dispersal or represent genetically isolated groups h...
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ftuglasgow:oai:eprints.gla.ac.uk:109517 2023-05-15T14:00:19+02:00 Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula Freer, Jennifer J. Mable, Barbara K. Clucas, Gemma Rogers, Alex D. Polito, Michael J. Dunn, Michael Naveen, Ron Levy, Hila Hart, Tom 2015-09 https://eprints.gla.ac.uk/109517/ unknown Springer Berlin Heidelberg Freer, J. J., Mable, B. K. <http://eprints.gla.ac.uk/view/author/3007.html> , Clucas, G., Rogers, A. D., Polito, M. J., Dunn, M., Naveen, R., Levy, H. and Hart, T. (2015) Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula. Polar Biology <https://eprints.gla.ac.uk/view/journal_volume/Polar_Biology.html>, 38(9), pp. 1493-1502. (doi:10.1007/s00300-015-1711-2 <https://doi.org/10.1007/s00300-015-1711-2>) Articles PeerReviewed 2015 ftuglasgow https://doi.org/10.1007/s00300-015-1711-2 2022-09-22T22:12:32Z Long-term monitoring of seabird numbers around Antarctica has revealed that the chinstrap penguin (Pygoscelis antarctica) is largely declining throughout its range in the Scotia Arc. Whether archipelagos across this large area remain connected via dispersal or represent genetically isolated groups has not yet been established. The purpose of this study was to assess the level of genetic differentiation between four breeding colonies on the Western Antarctic Peninsula (WAP), South Shetland, South Orkney, and South Sandwich Islands using microsatellite-based analysis of population structure. All colonies had similar levels of genetic diversity (mean heterozygosity, H O = 0.583) but colonies from the WAP and South Orkney Island had significant inbreeding coefficients. Hierarchical and pairwise F-statistics revealed very limited population structure in the Scotia Arc, with weak differentiation between colonies from the WAP, South Shetland and South Orkney Islands relative to the South Sandwich Islands, which are situated at least 1000 km apart from these other archipelagos. Bayesian model-based clustering methods found no evidence of significant population structuring, suggesting that whilst some isolation by distance may occur, there are no strong barriers to dispersal across this wide geographic range. No evidence of sex-biased dispersal was detected. We conclude that chinstrap penguin colonies across the Scotia Arc represent one interconnected breeding population. High levels of gene flow may be important in maintaining smaller, less stable colonies, and this status should be preserved by creating dispersal corridors throughout the Scotia Arc. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Chinstrap penguin Polar Biology Pygoscelis antarctica South Orkney Islands South Sandwich Islands University of Glasgow: Enlighten - Publications Antarctic Antarctic Peninsula Sandwich Islands South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) South Sandwich Islands Polar Biology 38 9 1493 1502 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
Long-term monitoring of seabird numbers around Antarctica has revealed that the chinstrap penguin (Pygoscelis antarctica) is largely declining throughout its range in the Scotia Arc. Whether archipelagos across this large area remain connected via dispersal or represent genetically isolated groups has not yet been established. The purpose of this study was to assess the level of genetic differentiation between four breeding colonies on the Western Antarctic Peninsula (WAP), South Shetland, South Orkney, and South Sandwich Islands using microsatellite-based analysis of population structure. All colonies had similar levels of genetic diversity (mean heterozygosity, H O = 0.583) but colonies from the WAP and South Orkney Island had significant inbreeding coefficients. Hierarchical and pairwise F-statistics revealed very limited population structure in the Scotia Arc, with weak differentiation between colonies from the WAP, South Shetland and South Orkney Islands relative to the South Sandwich Islands, which are situated at least 1000 km apart from these other archipelagos. Bayesian model-based clustering methods found no evidence of significant population structuring, suggesting that whilst some isolation by distance may occur, there are no strong barriers to dispersal across this wide geographic range. No evidence of sex-biased dispersal was detected. We conclude that chinstrap penguin colonies across the Scotia Arc represent one interconnected breeding population. High levels of gene flow may be important in maintaining smaller, less stable colonies, and this status should be preserved by creating dispersal corridors throughout the Scotia Arc. |
format |
Article in Journal/Newspaper |
author |
Freer, Jennifer J. Mable, Barbara K. Clucas, Gemma Rogers, Alex D. Polito, Michael J. Dunn, Michael Naveen, Ron Levy, Hila Hart, Tom |
spellingShingle |
Freer, Jennifer J. Mable, Barbara K. Clucas, Gemma Rogers, Alex D. Polito, Michael J. Dunn, Michael Naveen, Ron Levy, Hila Hart, Tom Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
author_facet |
Freer, Jennifer J. Mable, Barbara K. Clucas, Gemma Rogers, Alex D. Polito, Michael J. Dunn, Michael Naveen, Ron Levy, Hila Hart, Tom |
author_sort |
Freer, Jennifer J. |
title |
Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
title_short |
Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
title_full |
Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
title_fullStr |
Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
title_full_unstemmed |
Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula |
title_sort |
limited genetic differentiation among chinstrap penguin (pygoscelis antarctica) colonies in the scotia arc and western antarctic peninsula |
publisher |
Springer Berlin Heidelberg |
publishDate |
2015 |
url |
https://eprints.gla.ac.uk/109517/ |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Antarctic Peninsula Sandwich Islands South Orkney Islands South Sandwich Islands |
geographic_facet |
Antarctic Antarctic Peninsula Sandwich Islands South Orkney Islands South Sandwich Islands |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Chinstrap penguin Polar Biology Pygoscelis antarctica South Orkney Islands South Sandwich Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Chinstrap penguin Polar Biology Pygoscelis antarctica South Orkney Islands South Sandwich Islands |
op_relation |
Freer, J. J., Mable, B. K. <http://eprints.gla.ac.uk/view/author/3007.html> , Clucas, G., Rogers, A. D., Polito, M. J., Dunn, M., Naveen, R., Levy, H. and Hart, T. (2015) Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula. Polar Biology <https://eprints.gla.ac.uk/view/journal_volume/Polar_Biology.html>, 38(9), pp. 1493-1502. (doi:10.1007/s00300-015-1711-2 <https://doi.org/10.1007/s00300-015-1711-2>) |
op_doi |
https://doi.org/10.1007/s00300-015-1711-2 |
container_title |
Polar Biology |
container_volume |
38 |
container_issue |
9 |
container_start_page |
1493 |
op_container_end_page |
1502 |
_version_ |
1766269353984000000 |