Evolutionary theory is firmly grounded on the existence of trade-offs between life-history
traits, and recent interest has centred on the physiological mechanisms underlying such …

Publisher Summary This chapter reviews the current knowledge of variation in sperm
morphology over several levels of biological organization: variation within males (both within …

Reproductive Biology of Teleost Fishes is the first integrated review of the reproductive
biology of the bony fishes, which are the most species-rich and diversified group of …

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 …

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 …

Reproductive males face a trade-off between expenditure on precopulatory male–male
competition—increasing the number of females that they secure as mates—and sperm …

It is well known that sexual selection can target reproductive traits during successive pre‐
and post‐mating episodes of selection. A key focus of recent studies has been to understand …

While both sperm number and quality are now recognized to be important in determining the
outcome of sperm competition, very few studies have experimentally assessed the influence …

Boldness and aggressiveness are two behavioural traits that have received extensive
attention in the field of animal behaviour. However, relatively little is known about how these …

This book describes the evolutionary and ecological consequences of reproductive
competition for scarabaeine dung beetles. As well as giving us insight into the private lives …