Selection should favour accurate information gathering regarding the likely costs and
benefits of continued conflict. Here we consider how variation in the abilities of contestants …

SUMMARY (i) To find out whether a mating preference could have initially evolved for
adaptive reasons, one must determine whether the preferred trait could have provided …

Bright colors, enlarged fins, feather plumes, song, horns, antlers, and tusks are often highly
sex dimorphic. Why have males in many animals evolved more conspicuous ornaments …

This book presents the first unified conceptual and statistical framework for understanding
the evolution of reproductive strategies. Using the concept of the opportunity for sexual …

A review of the literature reveals that, if females prefer traits that deviate from the population
mean, they usually prefer traits of greater quantity. In cases in which the sensory bases of …

The study of female preferences and the evolution of male traits has until recently centered
on genetic coevolutionary mechanisms. An alternative mechanism posits that a preference …

Interest in the evolution of female mating preferences has increased greatly in recent years,
and numerous hypotheses have been proposed to explain how mating preferences evolve …

DARWIN1 believed that elaborate ornamental traits expressed in both sexes might be
favoured by mutual sexual selection driven by both female and male mate choice …

Abstract. Factors associated with the evolution of sexual dimorphism in sockeye salmon
were examined by relating individual behavioural correlates of reproductive success with …

Swordtail fish (Poeciliidae: genus Xiphophorus) are a paradigmatic case of sexual selection
by sensory exploitation. Female preference for males with a conspicuous “sword” ornament …