Why do males and females frequently differ so markedly in body size and morphology? Sex,
Size, and Gender Roles is the first book to investigate the genetic, developmental, and …

Male–female coevolution has taken different paths among closely related species, but our
understanding of the factors that govern its direction is limited. While it is clear that …

One of the most enigmatic observations in evolutionary biology is the evolution of
morphological or physiological traits in one sex that physically injure members of the other …

Rapid diversification is common among herbivorous insects and is often the result of host
shifts, leading to the exploitation of novel food sources. This, in turn, is associated with …

Despite widespread evidence for the benefits of polyandry, there are costs associated with
each mating for females, and for many species, it is unknown whether the costs of extra …

Background Male seminal fluid proteins (SFPs), transferred to females during mating, are
important reproductive proteins that have multifarious effects on female reproductive …

The optimal number of mating partners for females rarely coincides with that for males,
leading to sexual conflict over mating frequency. In the bruchid beetle Callosobruchus …

Conflicts of interest between mates can promote the evolution of male traits that reduce
female fitness and that drive coevolution between the sexes. The rate of adaptation depends …

The evolutionary factors affecting testis size are well documented, with sperm competition
being of major importance. However, the factors affecting sperm length are not well …

In this chapter we address sexual differences in insect development time. Although sexual
size dimorphism in insects is well documented and has been elaborated theoretically (see …