Seminal fluid proteins (SFPs) produced in reproductive tract tissues of male insects and
transferred to females during mating induce numerous physiological and behavioral …

A popular notion in sexual selection is that females are polyandrous and their offspring are
commonly sired by more than a single male. We now have large-scale evidence from …

Postcopulatory sexual selection (PCSS), comprised of sperm competition and cryptic female
choice, has emerged as a widespread evolutionary force among polyandrous animals …

Females frequently mate with several males, whose sperm then compete to fertilize
available ova. Sperm competition represents a potent selective force that is expected to …

Ejaculates are fundamental to fitness in sexually reproducing animals: males gain all their
direct fitness via the ejaculate and females require ejaculates to reproduce. Both sperm and …

Maternal effects are now universally recognised as a form of nongenetic parental influence
on offspring but, until recently, paternal effects were regarded as an anomaly. Although it is …

The Darwin–Bateman paradigm recognizes competition among males for access to multiple
mates as the main driver of sexual selection. Increasingly, however, females are also being …

Obligate eusociality with distinct caste phenotypes has evolved from strictly monogamous
sub-social ancestors in ants, some bees, some wasps and some termites. This implies that …

How barriers to gene flow arise and are maintained are key questions in evolutionary
biology. Speciation research has mainly focused on barriers that occur either before mating …

Sperm experience intense and varied selection that dramatically impacts the evolution of
sperm quality. Selection acts to ensure that sperm are fertilization-competent and able to …