Sperm competition in mammals

Human Fertility : Journal of the British Fertility Society
P Stockley

Abstract

Although Darwin identified the evolutionary significance of competition between males in the context of reproduction, it is only in the past few decades that we have begun to appreciate the importance of competition at the gametic level. Sperm competition, defined as competition between the sperm of two or more males for fertilization of the same set of ova, is now recognised as a key selective force shaping male reproductive anatomy, physiology and behaviour across diverse animal groups, including mammals. The aim of this article is to provide a brief review of the selective consequences of sperm competition in mammals, with emphasis on recent theoretical advances and empirical controversies. Evidence of female influences on sperm competition outcomes in mammals is also discussed, and it is concluded that understanding the selective pressures driving coevolution between male and female reproductive traits remains a major challenge for researchers in this field.

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Citations

Nov 18, 2004·Proceedings of the National Academy of Sciences of the United States of America·Jonathan A Green
Jul 19, 2005·Proceedings. Biological Sciences·Steven A RammPaula Stockley
Jan 8, 2014·Biological Reviews of the Cambridge Philosophical Society·Nicholas E Newton-Fisher
Jul 20, 2005·Trends in Immunology·Andreas ZieglerBarbara Uchanska-Ziegler

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