Condition-dependence, pleiotropy and the handicap principle of sexual selection in melanin-based colouration.

  title={Condition-dependence, pleiotropy and the handicap principle of sexual selection in melanin-based colouration.},
  author={Alexandre Roulin},
  journal={Biological reviews of the Cambridge Philosophical Society},
  volume={91 2},
The signalling function of melanin-based colouration is debated. Sexual selection theory states that ornaments should be costly to produce, maintain, wear or display to signal quality honestly to potential mates or competitors. An increasing number of studies supports the hypothesis that the degree of melanism covaries with aspects of body condition (e.g. body mass or immunity), which has contributed to change the initial perception that melanin-based colour ornaments entail no costs. Indeed… CONTINUE READING
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