Among most animals with internal fertilization, females store sperm in specific regions of
their reproductive tract for later use. Sperm storage enables prolonged fertility, physical and …

In many polyandrous species, the second male to mate with a female has fertilization
priority. Strategic mechanisms generating this pattern tend to involve facultative increases in …

Postcopulatory sexual selection due to sperm competition and/or cryptic female choice has
been documented in a diversity of taxonomic groups and is considered a pivotal component …

In Drosophila melanogaster, biological rhythms, aggression and mating are modulated by
group size and composition. However, the fitness significance of this group effect is …

When females mate with multiple partners, the risk of sperm competition depends on female
mating history. To maximize fitness, males should adjust their copulatory investments …

A synthetic gene drive that targets haplolethal genes on the X chromosome can skew the
sex ratio toward males. Like an “X-shredder,” it does not involve “homing,” and that has …

Following multiple matings, sperm from different males compete for fertilization within the
female reproductive tract. In many species, this competition results in an unequal sharing of …

Background The rapid evolution of seminal fluid proteins (SFPs) has been suggested to be
driven by adaptations to postcopulatory sexual selection (eg sperm competition). However …

Bateman's principles, originally a test of Darwin's theoretical ideas, have since become
fundamental to sexual selection theory and vital to contextualizing the role of anisogamy in …

Many laboratory speciation experiments have raised allopatric populations in different
environments to determine whether reproductive isolation evolves as a byproduct of …