Data from: Molecular population genetics of the melanic plumage polymorphism in arctic skuas (Stercorarius parasiticus): evidence for divergent selection on plumage colour

Nicholas I. Mundy & Kirstin Janssen
The arctic skua (Stercorarius parasiticus) is a classic example of an avian plumage polymorphism, with variation in melanin-based ventral plumage coloration defining pale, intermediate and dark morphs in adults of both sexes. However, despite several decades of field research, there is an incomplete understanding of how the polymorphism in ventral plumage colour is maintained and the selective forces involved. Here we investigate selection on a locus (MC1R) that is strongly associated with plumage colour variation...
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