Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA
The recent evolutionary history, population structure and movement patterns of beluga whales in the western Nearctic were inferred from an analysis of mitochondrial DNA control region sequence variation of 324 whales from 32 locations representing five summer concentration areas in Alaska and north‐...
Published in: | Molecular Ecology |
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Online Access: | http://dx.doi.org/10.1046/j.1365-294x.1997.00267.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-294X.1997.00267.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-294X.1997.00267.x |
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crwiley:10.1046/j.1365-294x.1997.00267.x 2024-09-30T14:32:59+00:00 Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA O'Corry‐Crowe, G. M. Suydam, R. S. Rosenberg, A. Frost, K. J. Dizon, A. E. 1997 http://dx.doi.org/10.1046/j.1365-294x.1997.00267.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-294X.1997.00267.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-294X.1997.00267.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 6, issue 10, page 955-970 ISSN 0962-1083 1365-294X journal-article 1997 crwiley https://doi.org/10.1046/j.1365-294x.1997.00267.x 2024-09-03T04:24:07Z The recent evolutionary history, population structure and movement patterns of beluga whales in the western Nearctic were inferred from an analysis of mitochondrial DNA control region sequence variation of 324 whales from 32 locations representing five summer concentration areas in Alaska and north‐west Canada. Phylogenetic relationships among haplotypes were inferred from parsimonious networks, and genetic subdivision was examined using haplotypic frequency‐based indices and an analysis of variance method modified for use with interhaplotypic distance data. MtDNA relationships were characterized by a series of star‐like phylogenies which, when viewed in conjunction with information on haplotype frequency and distribution, suggested a rapid radiation of beluga whales into the western Nearctic following the Pleistocene, and an early divergence of the Beaufort Sea from the Chukchi and Bering Seas subpopulations. Overall nucleotide diversity was low (0.51%) yet all major summering concentrations were significantly differentiated (Φ ST = 0.33) from one another. Stratification of samples by gender and age from the three northernmost subpopulations suggested that female cohorts from neighbouring subpopulations were more differentiated than males. Further stratification of adult animals by age revealed that older adults were substantially less subdivided among locations than younger adults, particularly for males, suggesting that dispersal, although limited, is biased toward older adult males. Overall, the patterns of mtDNA variation in beluga whales indicated that the summering concentrations are demographically, if not phyletically distinct. Population structure appears to be maintained primarily by natal homing behaviour, while asymmetries in dispersal may be associated with the type of mating system. Article in Journal/Newspaper Beaufort Sea Beluga Beluga whale Beluga* Chukchi Delphinapterus leucas Alaska Wiley Online Library Canada Molecular Ecology 6 10 955 970 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The recent evolutionary history, population structure and movement patterns of beluga whales in the western Nearctic were inferred from an analysis of mitochondrial DNA control region sequence variation of 324 whales from 32 locations representing five summer concentration areas in Alaska and north‐west Canada. Phylogenetic relationships among haplotypes were inferred from parsimonious networks, and genetic subdivision was examined using haplotypic frequency‐based indices and an analysis of variance method modified for use with interhaplotypic distance data. MtDNA relationships were characterized by a series of star‐like phylogenies which, when viewed in conjunction with information on haplotype frequency and distribution, suggested a rapid radiation of beluga whales into the western Nearctic following the Pleistocene, and an early divergence of the Beaufort Sea from the Chukchi and Bering Seas subpopulations. Overall nucleotide diversity was low (0.51%) yet all major summering concentrations were significantly differentiated (Φ ST = 0.33) from one another. Stratification of samples by gender and age from the three northernmost subpopulations suggested that female cohorts from neighbouring subpopulations were more differentiated than males. Further stratification of adult animals by age revealed that older adults were substantially less subdivided among locations than younger adults, particularly for males, suggesting that dispersal, although limited, is biased toward older adult males. Overall, the patterns of mtDNA variation in beluga whales indicated that the summering concentrations are demographically, if not phyletically distinct. Population structure appears to be maintained primarily by natal homing behaviour, while asymmetries in dispersal may be associated with the type of mating system. |
format |
Article in Journal/Newspaper |
author |
O'Corry‐Crowe, G. M. Suydam, R. S. Rosenberg, A. Frost, K. J. Dizon, A. E. |
spellingShingle |
O'Corry‐Crowe, G. M. Suydam, R. S. Rosenberg, A. Frost, K. J. Dizon, A. E. Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
author_facet |
O'Corry‐Crowe, G. M. Suydam, R. S. Rosenberg, A. Frost, K. J. Dizon, A. E. |
author_sort |
O'Corry‐Crowe, G. M. |
title |
Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
title_short |
Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
title_full |
Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
title_fullStr |
Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
title_full_unstemmed |
Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA |
title_sort |
phylogeography, population structure and dispersal patterns of the beluga whale delphinapterus leucas in the western nearctic revealed by mitochondrial dna |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.1046/j.1365-294x.1997.00267.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-294X.1997.00267.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-294X.1997.00267.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Beaufort Sea Beluga Beluga whale Beluga* Chukchi Delphinapterus leucas Alaska |
genre_facet |
Beaufort Sea Beluga Beluga whale Beluga* Chukchi Delphinapterus leucas Alaska |
op_source |
Molecular Ecology volume 6, issue 10, page 955-970 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-294x.1997.00267.x |
container_title |
Molecular Ecology |
container_volume |
6 |
container_issue |
10 |
container_start_page |
955 |
op_container_end_page |
970 |
_version_ |
1811637021515448320 |