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Mitochondrial Dna Variation Within The Western-Clark's Grebe Complex (Podicipedidae: Aechmophorus), Bruce Alan Eichhorst
Mitochondrial Dna Variation Within The Western-Clark's Grebe Complex (Podicipedidae: Aechmophorus), Bruce Alan Eichhorst
Theses and Dissertations
The Western Grebe (Aechmophorus occidenta:lis) and Clark's Grebe (A .. clarkii) are considered to be closely related .. Until recently, they were regarded as color phases of one species--the Western Grebe. I assessed mitochondrial DNA (mtDNA) variation within and between the Aechmophorus color phases. I also evaluated the plausibility of two vicariance models that have been. proposed to explain the evolution of the color phases. Grebes were collected from seven breeding sites, representing three geographic regions of the United States-Canada breeding range. Restriction-enzyme analysis of a total sample of 109 grebes was conducted. Estimates of nucleotide divergence ( dxu dA), …