Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes.
Killer whales (Orcinus orca) are the most widely distributed marine mammals and have radiated to occupy a range of ecological niches. Disparate sympatric types are found in the North Atlantic, Antarctic and North Pacific oceans, however, little is known about the underlying mechanisms driving diverg...
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ftdoajarticles:oai:doaj.org/article:aaf2dd7d505a40748afdf54aa797ac11 2023-05-15T13:31:06+02:00 Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. Andrew D Foote Phillip A Morin John W Durban Eske Willerslev Ludovic Orlando M Thomas P Gilbert 2011-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0024980 https://doaj.org/article/aaf2dd7d505a40748afdf54aa797ac11 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3176785?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0024980 https://doaj.org/article/aaf2dd7d505a40748afdf54aa797ac11 PLoS ONE, Vol 6, Iss 9, p e24980 (2011) Medicine R Science Q article 2011 ftdoajarticles https://doi.org/10.1371/journal.pone.0024980 2022-12-31T12:19:06Z Killer whales (Orcinus orca) are the most widely distributed marine mammals and have radiated to occupy a range of ecological niches. Disparate sympatric types are found in the North Atlantic, Antarctic and North Pacific oceans, however, little is known about the underlying mechanisms driving divergence. Previous phylogeographic analysis using complete mitogenomes yielded a bifurcating tree of clades corresponding to described ecotypes. However, there was low support at two nodes at which two Pacific and two Atlantic clades diverged. Here we apply further phylogenetic and coalescent analyses to partitioned mitochondrial genome sequences to better resolve the pattern of past radiations in this species. Our phylogenetic reconstructions indicate that in the North Pacific, sympatry between the maternal lineages that make up each ecotype arises from secondary contact. Both the phylogenetic reconstructions and a clinal decrease in diversity suggest a North Pacific to North Atlantic founding event, and the later return of killer whales to the North Pacific. Therefore, ecological divergence could have occurred during the allopatric phase through drift or selection and/or may have either commenced or have been consolidated upon secondary contact due to resource competition. The estimated timing of bidirectional migration between the North Pacific and North Atlantic coincided with the previous inter-glacial when the leakage of fauna from the Indo-Pacific into the Atlantic via the Agulhas current was particularly vigorous. Article in Journal/Newspaper Antarc* Antarctic Killer Whale North Atlantic Orca Orcinus orca Killer whale Directory of Open Access Journals: DOAJ Articles Antarctic Pacific PLoS ONE 6 9 e24980 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Andrew D Foote Phillip A Morin John W Durban Eske Willerslev Ludovic Orlando M Thomas P Gilbert Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
topic_facet |
Medicine R Science Q |
description |
Killer whales (Orcinus orca) are the most widely distributed marine mammals and have radiated to occupy a range of ecological niches. Disparate sympatric types are found in the North Atlantic, Antarctic and North Pacific oceans, however, little is known about the underlying mechanisms driving divergence. Previous phylogeographic analysis using complete mitogenomes yielded a bifurcating tree of clades corresponding to described ecotypes. However, there was low support at two nodes at which two Pacific and two Atlantic clades diverged. Here we apply further phylogenetic and coalescent analyses to partitioned mitochondrial genome sequences to better resolve the pattern of past radiations in this species. Our phylogenetic reconstructions indicate that in the North Pacific, sympatry between the maternal lineages that make up each ecotype arises from secondary contact. Both the phylogenetic reconstructions and a clinal decrease in diversity suggest a North Pacific to North Atlantic founding event, and the later return of killer whales to the North Pacific. Therefore, ecological divergence could have occurred during the allopatric phase through drift or selection and/or may have either commenced or have been consolidated upon secondary contact due to resource competition. The estimated timing of bidirectional migration between the North Pacific and North Atlantic coincided with the previous inter-glacial when the leakage of fauna from the Indo-Pacific into the Atlantic via the Agulhas current was particularly vigorous. |
format |
Article in Journal/Newspaper |
author |
Andrew D Foote Phillip A Morin John W Durban Eske Willerslev Ludovic Orlando M Thomas P Gilbert |
author_facet |
Andrew D Foote Phillip A Morin John W Durban Eske Willerslev Ludovic Orlando M Thomas P Gilbert |
author_sort |
Andrew D Foote |
title |
Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
title_short |
Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
title_full |
Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
title_fullStr |
Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
title_full_unstemmed |
Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes. |
title_sort |
out of the pacific and back again: insights into the matrilineal history of pacific killer whale ecotypes. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2011 |
url |
https://doi.org/10.1371/journal.pone.0024980 https://doaj.org/article/aaf2dd7d505a40748afdf54aa797ac11 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Killer Whale North Atlantic Orca Orcinus orca Killer whale |
genre_facet |
Antarc* Antarctic Killer Whale North Atlantic Orca Orcinus orca Killer whale |
op_source |
PLoS ONE, Vol 6, Iss 9, p e24980 (2011) |
op_relation |
http://europepmc.org/articles/PMC3176785?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0024980 https://doaj.org/article/aaf2dd7d505a40748afdf54aa797ac11 |
op_doi |
https://doi.org/10.1371/journal.pone.0024980 |
container_title |
PLoS ONE |
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6 |
container_issue |
9 |
container_start_page |
e24980 |
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1766015996170076160 |