Sperm competition is a powerful selective force that has shaped sexual traits throughout
animal evolution. Yet, how fertilization mode (ie external versus internal fertilization) …

The 'good genes' hypothesis for the evolution of male secondary sexual traits poses that
female preferences for such traits are driven by indirect genetic benefits. However, support …

Traits associated with mating and fertilization success are expected to senesce with age, but
limited information is available on their relative rates of senescence. In polyandrous species …

Female preferences for male ornamental traits can arise from indirect benefits, such as
increased attractiveness or better viability of progeny, but empirical evidence for such …

Males of many species evolved the capability of adjusting their ejaculate phenotype in
response to social cues to match the expected mating conditions. When females store sperm …

Although it is often expected that adverse environmental conditions depress the expression
of condition‐dependent sexually selected traits, the full consequences of environmental …

Imminent predation risk affects mating behaviours in prey individuals in a multitude of ways
that can theoretically impact the strength of sexual selection, as well as its operation on …

Fifty years of research on sperm competition has led to a very good understanding of the
interspecific variation in sperm production traits. The reasons why this variation is often very …

Life‐history theory suggests that ageing is one of the costs of reproduction. Accordingly, a
higher reproductive allocation is expected to increase the deterioration of both the somatic …

In polyandrous species males invest significant resources in producing large and high-
quality ejaculates. As ejaculates are costly, males are expected to modulate their investment …