gene flow and hybridization between numerically imbalanced populations of two duck species on the subantarctic island of south georgia.hybridization is common between species of animals, particularly in waterfowl (anatidae). one factor shown to promote hybridization is restricted mate choice, which can occur when 2 species occur in sympatry but one is rare. according to the hubbs principle, or "desperation hypothesis," the rarer species is more likely to mate with heterospecifics. we report the second of 2 independent examples of hybridization between 2 species of ducks inhabiting island ecosystems in the subantarctic and south ...201324367536
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