Multiple mating or group spawning leads to post‐copulatory sexual selection, which
generally favours ejaculates that are more competitive under sperm competition. In four …

Male mate choice occurs in several animal species, but we know little about the factors that
influence the expression of this behaviour. Males vary in their capacity to acquire mates (ie …

The evolution and maintenance of secondary sexual characteristics and behavior are
heavily influenced by the variance in mating success among individuals in a population. The …

Insects display a staggering diversity of mating and social behaviours. Studying these
systems provides insights into a wide range of evolutionary and behavioural questions, such …

In sexually reproducing organisms, male ejaculates are complex traits that are potentially
subject to many different selection pressures. Recent experimental evidence supports the …

The maternally inherited bacterium Wolbachia pipientis infects 25–75% of arthropods and
manipulates host reproduction to improve its transmission. One way Wolbachia achieves …

How males and females contribute to joint reproductive success has been a long-standing
question in sexual selection. Under postcopulatory sexual selection, paternity success is …

In theoretical and experimental approaches to the study of sperm competition, it is often
assumed that ejaculates always contain enough sperm of good quality and that they are …

Sperm competition theory predicts that under high risk of sperm competition, males will
increase the number of sperm that they allocate to a female. This prediction has been …

Due to the physiological cost of sperm production, males are expected to be prudent in their
expenditure and adjust their investment according to current social conditions. Strategic …