In vertebrates, melanin-based coloration is often associated with variation in physiological
and behavioural traits. We propose that this association stems from pleiotropic effects of the …

Following Darwin's original insights regarding sexual selection, studies of intrasexual
competition have mainly focused on male competition for mates; by contrast, female …

Literature Cited to accompany Animal Communication, 2e Page 1 Principles of Animal
Communication, Second Edition Jack W. Bradbury and Sandra L. Vehrencamp Chapter 14 …

The hypothesis that ornaments can honestly signal quality only if their expression is
condition-dependent has dominated the study of the evolution and function of colour traits …

This brief review summarizes new findings related to the reported beneficial effects of
melatonin on reproductive physiology beyond its now well-known role in determining the …

Research conducted in the last fifteen years has placed in question many of the traditional
conclusions scholars have formed about human female sexuality. Though conventional …

Skin pigmentation is due to the accumulation of two types of melanin granules in the
keratinocytes. Besides being the most potent blocker of ultraviolet radiation, the role of …

This article provides a review of evolutionary theory and empirical research on mate choices
in nonhuman species and uses it as a frame for understanding the how and why of human …

All melanin-colored ornaments contain a mixture of the two types of melanin, eumelanin and
pheomelanin. The reflectance spectrum of the ornament is, in part, a function of the ratio of …

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 …