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Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska

Condor

By:
, ,
DOI: 10.1650/0010-5422(2007)109[878:GCOCEB]2.0.CO;2

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Abstract

We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron lamin A and mitochondrial DNA (mtDNA) control region. Intercolony variation in haplotypic frequencies also was observed at mtDNA. Positive growth signatures assayed from microsatellites, nuclear introns, and mtDNA indicate recent colonization of the YKD, and may explain the low levels of structuring observed. Gene flow estimates based on microsatellites, nuclear introns, and mtDNA suggest asymmetrical gene flow between mainland colonies and Kigigak Island, with more individuals on average dispersing from mainland populations to Kigigak Island than vice versa. The directionality of gene flow observed may be explained by the colonization of the YKD from northern glacial refugia or by YKD metapopulation dynamics. ?? The Cooper Ornithological Society 2007.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska
Series title:
Condor
DOI:
10.1650/0010-5422(2007)109[878:GCOCEB]2.0.CO;2
Volume
109
Issue:
4
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Condor
First page:
878
Last page:
893
Number of Pages:
16