Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations
Abstract 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 conditio...
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crwiley:10.1111/j.1365-294x.2009.04407.x 2024-06-23T07:47:52+00:00 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 http://dx.doi.org/10.1111/j.1365-294x.2009.04407.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2009.04407.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2009.04407.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 18, issue 24, page 5207-5217 ISSN 0962-1083 1365-294X journal-article 2009 crwiley https://doi.org/10.1111/j.1365-294x.2009.04407.x 2024-06-11T04:47:52Z Abstract 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 Wiley Online Library Antarctic Pacific Molecular Ecology 18 24 5207 5217 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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 |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2009.04407.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2009.04407.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2009.04407.x |
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 |
Molecular Ecology volume 18, issue 24, page 5207-5217 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.2009.04407.x |
container_title |
Molecular Ecology |
container_volume |
18 |
container_issue |
24 |
container_start_page |
5207 |
op_container_end_page |
5217 |
_version_ |
1802638083219259392 |