Genitalia are conspicuously variable, even in closely related taxa that are otherwise
morphologically very similar. Explaining genital diversity is a longstanding problem that is …

One of the most pervasive ideas in the sexual selection literature is the belief that sexually
selected traits almost universally exhibit positive static allometries (ie, within a sample of …

This book celebrates the guppy's unique contribution to evolutionary ecology. Ever since
Caryl Haskins described guppy populations as a'natural experiment'because of the way …

Morphological traits often covary within and among species according to simple power laws
referred to as allometry. Such allometric relationships may result from common growth …

Predation is heterogeneously distributed across space and time, and is presumed to
represent a major source of evolutionary diversification. In fishes, fast‐starts–udden, high …

Fishes show a remarkable diversity of shapes which have been associated with their
swimming abilities and anti-predator adaptations. The crucian carp (Carassius carassius) …

Genital coevolution between the sexes is expected to be common because of the direct
interaction between male and female genitalia during copulation. Here we review the …

A survey of 117 species of arthropods and 17 species of vertebrates showed a strong trend
for male genitalia to have relatively low static allometric values. This trend contrasts with the …

Male genitalia may experience more rapid, divergent evolution than any other animal
character, but why? Research during the past several decades has culminated in the view …

In animals with internal fertilization and promiscuous mating, male genitalia show rapid and
divergent evolution. Three hypotheses have been suggested to explain the evolutionary …