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Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling

Contact zones between ecotypes are windows for understanding how species may react to climate changes. Here, we analysed the fine-scale genetic and morphological variation in harbour porpoises (Phocoena phocoena) around the UK by genotyping 591 stranded animals at nine microsatellite loci. The data...

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Autores principales: Fontaine, Michaël C., Thatcher, Oliver, Ray, Nicolas, Piry, Sylvain, Brownlow, Andrew, Davison, Nicholas J., Jepson, Paul, Deaville, Rob, Goodman, Simon J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5383846/
https://www.ncbi.nlm.nih.gov/pubmed/28405389
http://dx.doi.org/10.1098/rsos.160992
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author Fontaine, Michaël C.
Thatcher, Oliver
Ray, Nicolas
Piry, Sylvain
Brownlow, Andrew
Davison, Nicholas J.
Jepson, Paul
Deaville, Rob
Goodman, Simon J.
author_facet Fontaine, Michaël C.
Thatcher, Oliver
Ray, Nicolas
Piry, Sylvain
Brownlow, Andrew
Davison, Nicholas J.
Jepson, Paul
Deaville, Rob
Goodman, Simon J.
author_sort Fontaine, Michaël C.
collection PubMed
description Contact zones between ecotypes are windows for understanding how species may react to climate changes. Here, we analysed the fine-scale genetic and morphological variation in harbour porpoises (Phocoena phocoena) around the UK by genotyping 591 stranded animals at nine microsatellite loci. The data were integrated with a prior study to map at high resolution the contact zone between two previously identified ecotypes meeting in the northern Bay of Biscay. Clustering and spatial analyses revealed that UK porpoises are derived from two genetic pools with porpoises from the southwestern UK being genetically differentiated, and having larger body sizes compared to those of other UK areas. Southwestern UK porpoises showed admixed ancestry between southern and northern ecotypes with a contact zone extending from the northern Bay of Biscay to the Celtic Sea and Channel. Around the UK, ancestry blends from one genetic group to the other along a southwest--northeast axis, correlating with body size variation, consistent with previously reported morphological differences between the two ecotypes. We also detected isolation by distance among juveniles but not in adults, suggesting that stranded juveniles display reduced intergenerational dispersal. The fine-scale structure of this admixture zone raises the question of how it will respond to future climate change and provides a reference point for further study.
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spelling pubmed-53838462017-04-12 Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling Fontaine, Michaël C. Thatcher, Oliver Ray, Nicolas Piry, Sylvain Brownlow, Andrew Davison, Nicholas J. Jepson, Paul Deaville, Rob Goodman, Simon J. R Soc Open Sci Biology (Whole Organism) Contact zones between ecotypes are windows for understanding how species may react to climate changes. Here, we analysed the fine-scale genetic and morphological variation in harbour porpoises (Phocoena phocoena) around the UK by genotyping 591 stranded animals at nine microsatellite loci. The data were integrated with a prior study to map at high resolution the contact zone between two previously identified ecotypes meeting in the northern Bay of Biscay. Clustering and spatial analyses revealed that UK porpoises are derived from two genetic pools with porpoises from the southwestern UK being genetically differentiated, and having larger body sizes compared to those of other UK areas. Southwestern UK porpoises showed admixed ancestry between southern and northern ecotypes with a contact zone extending from the northern Bay of Biscay to the Celtic Sea and Channel. Around the UK, ancestry blends from one genetic group to the other along a southwest--northeast axis, correlating with body size variation, consistent with previously reported morphological differences between the two ecotypes. We also detected isolation by distance among juveniles but not in adults, suggesting that stranded juveniles display reduced intergenerational dispersal. The fine-scale structure of this admixture zone raises the question of how it will respond to future climate change and provides a reference point for further study. The Royal Society Publishing 2017-03-01 /pmc/articles/PMC5383846/ /pubmed/28405389 http://dx.doi.org/10.1098/rsos.160992 Text en © 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Biology (Whole Organism)
Fontaine, Michaël C.
Thatcher, Oliver
Ray, Nicolas
Piry, Sylvain
Brownlow, Andrew
Davison, Nicholas J.
Jepson, Paul
Deaville, Rob
Goodman, Simon J.
Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title_full Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title_fullStr Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title_full_unstemmed Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title_short Mixing of porpoise ecotypes in southwestern UK waters revealed by genetic profiling
title_sort mixing of porpoise ecotypes in southwestern uk waters revealed by genetic profiling
topic Biology (Whole Organism)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5383846/
https://www.ncbi.nlm.nih.gov/pubmed/28405389
http://dx.doi.org/10.1098/rsos.160992
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