Surviving with low genetic diversity: the case of albatrosses
Low genetic diversity is predicted to negatively impact species viability and has been a central concern for conservation. In contrast, the possibility that some species may thrive in spite of a relatively poor diversity has received little attention. The wandering and Amsterdam albatrosses (Diomede...
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ftpubmed:oai:pubmedcentral.nih.gov:2093973 2023-05-15T16:00:56+02:00 Surviving with low genetic diversity: the case of albatrosses Milot, Emmanuel Weimerskirch, Henri Duchesne, Pierre Bernatchez, Louis 2007-01-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2093973 http://www.ncbi.nlm.nih.gov/pubmed/17251114 https://doi.org/10.1098/rspb.2006.0221 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2093973 http://www.ncbi.nlm.nih.gov/pubmed/17251114 http://dx.doi.org/10.1098/rspb.2006.0221 © 2007 The Royal Society Research Article Text 2007 ftpubmed https://doi.org/10.1098/rspb.2006.0221 2013-09-01T08:00:12Z Low genetic diversity is predicted to negatively impact species viability and has been a central concern for conservation. In contrast, the possibility that some species may thrive in spite of a relatively poor diversity has received little attention. The wandering and Amsterdam albatrosses (Diomedea exulans and Diomedea amsterdamensis) are long-lived seabirds standing at an extreme along the gradient of life strategies, having traits that may favour inbreeding and low genetic diversity. Divergence time of the two species is estimated at 0.84 Myr ago from cytochrome b data. We tested the hypothesis that both albatrosses inherited poor genetic diversity from their common ancestor. Within the wandering albatross, per cent polymorphic loci and expected heterozygosity at amplified fragment length polymorphisms were approximately one-third of the minimal values reported in other vertebrates. Genetic diversity in the Amsterdam albatross, which is recovering from a severe bottleneck, was about twice as low as in the wandering albatross. Simulations supported the hypothesis that genetic diversity in albatrosses was already depleted prior to their divergence. Given the generally high breeding success of these species, it is likely that they are not suffering much from their impoverished diversity. Whether albatrosses are unique in this regard is unknown, but they appear to challenge the classical view about the negative consequences of genetic depletion on species survival. Text Diomedea exulans Wandering Albatross PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 274 1611 779 787 |
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Research Article Milot, Emmanuel Weimerskirch, Henri Duchesne, Pierre Bernatchez, Louis Surviving with low genetic diversity: the case of albatrosses |
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Research Article |
description |
Low genetic diversity is predicted to negatively impact species viability and has been a central concern for conservation. In contrast, the possibility that some species may thrive in spite of a relatively poor diversity has received little attention. The wandering and Amsterdam albatrosses (Diomedea exulans and Diomedea amsterdamensis) are long-lived seabirds standing at an extreme along the gradient of life strategies, having traits that may favour inbreeding and low genetic diversity. Divergence time of the two species is estimated at 0.84 Myr ago from cytochrome b data. We tested the hypothesis that both albatrosses inherited poor genetic diversity from their common ancestor. Within the wandering albatross, per cent polymorphic loci and expected heterozygosity at amplified fragment length polymorphisms were approximately one-third of the minimal values reported in other vertebrates. Genetic diversity in the Amsterdam albatross, which is recovering from a severe bottleneck, was about twice as low as in the wandering albatross. Simulations supported the hypothesis that genetic diversity in albatrosses was already depleted prior to their divergence. Given the generally high breeding success of these species, it is likely that they are not suffering much from their impoverished diversity. Whether albatrosses are unique in this regard is unknown, but they appear to challenge the classical view about the negative consequences of genetic depletion on species survival. |
format |
Text |
author |
Milot, Emmanuel Weimerskirch, Henri Duchesne, Pierre Bernatchez, Louis |
author_facet |
Milot, Emmanuel Weimerskirch, Henri Duchesne, Pierre Bernatchez, Louis |
author_sort |
Milot, Emmanuel |
title |
Surviving with low genetic diversity: the case of albatrosses |
title_short |
Surviving with low genetic diversity: the case of albatrosses |
title_full |
Surviving with low genetic diversity: the case of albatrosses |
title_fullStr |
Surviving with low genetic diversity: the case of albatrosses |
title_full_unstemmed |
Surviving with low genetic diversity: the case of albatrosses |
title_sort |
surviving with low genetic diversity: the case of albatrosses |
publisher |
The Royal Society |
publishDate |
2007 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2093973 http://www.ncbi.nlm.nih.gov/pubmed/17251114 https://doi.org/10.1098/rspb.2006.0221 |
genre |
Diomedea exulans Wandering Albatross |
genre_facet |
Diomedea exulans Wandering Albatross |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2093973 http://www.ncbi.nlm.nih.gov/pubmed/17251114 http://dx.doi.org/10.1098/rspb.2006.0221 |
op_rights |
© 2007 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2006.0221 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
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274 |
container_issue |
1611 |
container_start_page |
779 |
op_container_end_page |
787 |
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1766396941115064320 |