Animals often need to signal to attract mates and behavioural signalling may impose
substantial energetic and fitness costs to signallers. Consequently, individuals often …

Sexual harassment is common among poeciliid fish. In some fishes, males show a high
frequency of sneak copulation; such sexual activity is costly to the females in terms of …

Male alternative reproductive strategies are found in some species of most major animal
taxa but are especially widespread in fishes. Mature males of the shortfin molly, Poecilia …

The maintenance of variation within natural populations is key for natural selection to
operate. Polymorphism is an intriguing form of variation that involves the persistence of …

Behaviours can be adaptively correlated with each other and with other aspects of
phenotype. We investigated behaviour across foraging, mating, and risk contexts in females …

The mating behavior of the knife livebearer Alfaro cultratus is described in detail. During
“rubbing,” the male swims to a position above the female and gently moves down repeatedly …

Sexual polymorphism describes discrete variation among individuals of one sex, often
involving conspicuously colored, displaying male morphs and inconspicuous, sneaking …

Genital morphology exhibits tremendous variation and is intimately linked with fitness.
Sexual selection, nonmating natural selection and neutral forces have been explored as …

Despite the increasing interest in the use of intromittent male genitalia and coercive mating
behaviour in poeciliids, detailed studies of the mating behaviour of most species in this …

Reproductive mode is predicted to influence the form of sexual selection. The viviparity‐
driven conflict hypothesis posits that a shift from lecithotrophic (yolk‐nourished) to …