Sexual dimorphism in the skull of the feral American mink is discussed, based on 15 measurements of 53 adults from southern Norway. The differences in means are highly significant. Variation is found to be greatest in males. Sexual dimorphism is thought to be an adaptation for different reproductive roles of the sexes in a polygynous mating system with lack of male parental care.
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Øystein Wiig (1982) studied this question.
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