Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift
Abstract The evolution of diversity in the marine ecosystem is poorly understood, given the relatively high potential for connectivity, especially for highly mobile species such as whales and dolphins. The killer whale ( Orcinus orca ) has a worldwide distribution, and individual social groups trave...
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Online Access: | http://dx.doi.org/10.1111/mec.12929 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12929 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12929 |
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crwiley:10.1111/mec.12929 2024-09-15T18:16:42+00:00 Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift Moura, Andre E. Kenny, John G. Chaudhuri, Roy Hughes, Margaret A. J. Welch, Andreanna Reisinger, Ryan R. de Bruyn, P. J. Nico Dahlheim, Marilyn E. Hall, Neil Hoelzel, A. Rus Natural Environment Research Council 2014 http://dx.doi.org/10.1111/mec.12929 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12929 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12929 en eng Wiley http://creativecommons.org/licenses/by/3.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 23, issue 21, page 5179-5192 ISSN 0962-1083 1365-294X journal-article 2014 crwiley https://doi.org/10.1111/mec.12929 2024-08-09T04:24:38Z Abstract The evolution of diversity in the marine ecosystem is poorly understood, given the relatively high potential for connectivity, especially for highly mobile species such as whales and dolphins. The killer whale ( Orcinus orca ) has a worldwide distribution, and individual social groups travel over a wide geographic range. Even so, regional populations have been shown to be genetically differentiated, including among different foraging specialists (ecotypes) in sympatry. Given the strong matrifocal social structure of this species together with strong resource specializations, understanding the process of differentiation will require an understanding of the relative importance of both genetic drift and local adaptation. Here we provide a high‐resolution analysis based on nuclear single‐nucleotide polymorphic markers and inference about differentiation at both neutral loci and those potentially under selection. We find that all population comparisons, within or among foraging ecotypes, show significant differentiation, including populations in parapatry and sympatry. Loci putatively under selection show a different pattern of structure compared to neutral loci and are associated with gene ontology terms reflecting physiologically relevant functions (e.g. related to digestion). The pattern of differentiation for one ecotype in the North Pacific suggests local adaptation and shows some fixed differences among sympatric ecotypes. We suggest that differential habitat use and resource specializations have promoted sufficient isolation to allow differential evolution at neutral and functional loci, but that the process is recent and dependent on both selection and drift. Article in Journal/Newspaper Killer Whale Orca Orcinus orca Killer whale Wiley Online Library Molecular Ecology 23 21 5179 5192 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The evolution of diversity in the marine ecosystem is poorly understood, given the relatively high potential for connectivity, especially for highly mobile species such as whales and dolphins. The killer whale ( Orcinus orca ) has a worldwide distribution, and individual social groups travel over a wide geographic range. Even so, regional populations have been shown to be genetically differentiated, including among different foraging specialists (ecotypes) in sympatry. Given the strong matrifocal social structure of this species together with strong resource specializations, understanding the process of differentiation will require an understanding of the relative importance of both genetic drift and local adaptation. Here we provide a high‐resolution analysis based on nuclear single‐nucleotide polymorphic markers and inference about differentiation at both neutral loci and those potentially under selection. We find that all population comparisons, within or among foraging ecotypes, show significant differentiation, including populations in parapatry and sympatry. Loci putatively under selection show a different pattern of structure compared to neutral loci and are associated with gene ontology terms reflecting physiologically relevant functions (e.g. related to digestion). The pattern of differentiation for one ecotype in the North Pacific suggests local adaptation and shows some fixed differences among sympatric ecotypes. We suggest that differential habitat use and resource specializations have promoted sufficient isolation to allow differential evolution at neutral and functional loci, but that the process is recent and dependent on both selection and drift. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Moura, Andre E. Kenny, John G. Chaudhuri, Roy Hughes, Margaret A. J. Welch, Andreanna Reisinger, Ryan R. de Bruyn, P. J. Nico Dahlheim, Marilyn E. Hall, Neil Hoelzel, A. Rus |
spellingShingle |
Moura, Andre E. Kenny, John G. Chaudhuri, Roy Hughes, Margaret A. J. Welch, Andreanna Reisinger, Ryan R. de Bruyn, P. J. Nico Dahlheim, Marilyn E. Hall, Neil Hoelzel, A. Rus Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
author_facet |
Moura, Andre E. Kenny, John G. Chaudhuri, Roy Hughes, Margaret A. J. Welch, Andreanna Reisinger, Ryan R. de Bruyn, P. J. Nico Dahlheim, Marilyn E. Hall, Neil Hoelzel, A. Rus |
author_sort |
Moura, Andre E. |
title |
Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
title_short |
Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
title_full |
Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
title_fullStr |
Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
title_full_unstemmed |
Population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
title_sort |
population genomics of the killer whale indicates ecotype evolution in sympatry involving both selection and drift |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/mec.12929 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12929 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12929 |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_source |
Molecular Ecology volume 23, issue 21, page 5179-5192 ISSN 0962-1083 1365-294X |
op_rights |
http://creativecommons.org/licenses/by/3.0/ http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/mec.12929 |
container_title |
Molecular Ecology |
container_volume |
23 |
container_issue |
21 |
container_start_page |
5179 |
op_container_end_page |
5192 |
_version_ |
1810454717968416768 |