Conventional sex roles imply caring females and competitive males. The evolution of sex
role divergence is widely attributed to anisogamy initiating a self‐reinforcing process. The …

The female reproductive tract is where competition between the sperm of different males
takes place, aided and abetted by the female herself. Intense postcopulatory sexual …

One hundred years after Darwin considered how sexual selection shapes the behavioral
and morphological characteristics of males for acquiring mates, Parker realized that sexual …

The outcome of sperm competition is mediated largely by the relative numbers of sperm from
competing males. However, substantial variation in features of sperm morphology and …

Sperm competition occurs when sperm from more than one male compete for fertilizations
[1]. This form of post-copulatory sexual selection is recognized as a significant and …

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 …

Among vertebrates, fish show by far the greatest variability of alternative reproductive tactics
(ARTs). Usually, males attempting to monopolize access to females or fertilizations are …

Females frequently mate with several males, whose sperm then compete to fertilize
available ova. Sperm competition represents a potent selective force that is expected to …

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

Fish exhibit an enormous variety of reproductive patterns. There is external and internal
fertilization, simultaneous and sequential hermaphroditism as well as gonochorism, and an …