Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations
Udgivelsesdato: 2009-Dec Ecological divergence has a central role in speciation and is therefore an important source of biodiversity. Studying the micro-evolutionary processes of ecological diversification at its early stages provides an opportunity for investigating the causative mechanisms and eco...
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ftcopenhagenunip:oai:pure.atira.dk:publications/a4e45c20-2607-11df-8ed1-000ea68e967b 2023-05-15T13:48:15+02:00 Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations Foote, Andrew D Newton, Jason Piertney, Stuart B Willerslev, Eske Gilbert, M Thomas P 2009 https://curis.ku.dk/portal/da/publications/ecological-morphological-and-genetic-divergence-of-sympatric-north-atlantic-killer-whale-populations(a4e45c20-2607-11df-8ed1-000ea68e967b).html eng eng info:eu-repo/semantics/restrictedAccess Foote , A D , Newton , J , Piertney , S B , Willerslev , E & Gilbert , M T P 2009 , ' Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations ' , Molecular Ecology , vol. 18 , no. 24 , pp. 5207-17 . article 2009 ftcopenhagenunip 2022-02-24T00:03:45Z Udgivelsesdato: 2009-Dec Ecological divergence has a central role in speciation and is therefore an important source of biodiversity. Studying the micro-evolutionary processes of ecological diversification at its early stages provides an opportunity for investigating the causative mechanisms and ecological conditions promoting divergence. Here we use morphological traits, nitrogen stable isotope ratios and tooth wear to characterize two disparate types of North Atlantic killer whale. We find a highly specialist type, which reaches up to 8.5 m in length and a generalist type which reaches up to 6.6 m in length. There is a single fixed genetic difference in the mtDNA control region between these types, indicating integrity of groupings and a shallow divergence. Phylogenetic analysis indicates this divergence is independent of similar ecological divergences in the Pacific and Antarctic. Niche-width in the generalist type is more strongly influenced by between-individual variation rather than within-individual variation in the composition of the diet. This first step to divergent specialization on different ecological resources provides a rare example of the ecological conditions at the early stages of adaptive radiation. Article in Journal/Newspaper Antarc* Antarctic Killer Whale North Atlantic Killer whale University of Copenhagen: Research Antarctic Pacific |
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Open Polar |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
Udgivelsesdato: 2009-Dec Ecological divergence has a central role in speciation and is therefore an important source of biodiversity. Studying the micro-evolutionary processes of ecological diversification at its early stages provides an opportunity for investigating the causative mechanisms and ecological conditions promoting divergence. Here we use morphological traits, nitrogen stable isotope ratios and tooth wear to characterize two disparate types of North Atlantic killer whale. We find a highly specialist type, which reaches up to 8.5 m in length and a generalist type which reaches up to 6.6 m in length. There is a single fixed genetic difference in the mtDNA control region between these types, indicating integrity of groupings and a shallow divergence. Phylogenetic analysis indicates this divergence is independent of similar ecological divergences in the Pacific and Antarctic. Niche-width in the generalist type is more strongly influenced by between-individual variation rather than within-individual variation in the composition of the diet. This first step to divergent specialization on different ecological resources provides a rare example of the ecological conditions at the early stages of adaptive radiation. |
format |
Article in Journal/Newspaper |
author |
Foote, Andrew D Newton, Jason Piertney, Stuart B Willerslev, Eske Gilbert, M Thomas P |
spellingShingle |
Foote, Andrew D Newton, Jason Piertney, Stuart B Willerslev, Eske Gilbert, M Thomas P Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
author_facet |
Foote, Andrew D Newton, Jason Piertney, Stuart B Willerslev, Eske Gilbert, M Thomas P |
author_sort |
Foote, Andrew D |
title |
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
title_short |
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
title_full |
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
title_fullStr |
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
title_full_unstemmed |
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations |
title_sort |
ecological, morphological and genetic divergence of sympatric north atlantic killer whale populations |
publishDate |
2009 |
url |
https://curis.ku.dk/portal/da/publications/ecological-morphological-and-genetic-divergence-of-sympatric-north-atlantic-killer-whale-populations(a4e45c20-2607-11df-8ed1-000ea68e967b).html |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Killer Whale North Atlantic Killer whale |
genre_facet |
Antarc* Antarctic Killer Whale North Atlantic Killer whale |
op_source |
Foote , A D , Newton , J , Piertney , S B , Willerslev , E & Gilbert , M T P 2009 , ' Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations ' , Molecular Ecology , vol. 18 , no. 24 , pp. 5207-17 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766249023832850432 |