Sarah A. Sonsthagen, R. Terry Chesser, Douglas A. Bell and Carla J. Dove Hybridization among Arctic white-headed gulls (Larus spp.) obscures the genetic legacy of the Pleistocene Ecology and Evolution 2
Concordance in haplotype and allele groups suggests that white-headed gulls were subdivided into at least two refugia that persisted for extended periods of time during the Pleistocene. However, we were unable to substantiate these putative refugia using coalescent theory. The strong tendency for hybridization in this group erased the genetic signature of Pleistocene refugia.
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