Tactic–specific success in sperm competition
نویسندگان
چکیده
منابع مشابه
Tactic-specific success in sperm competition.
Sperm competition is a major force in sexual selection, but its implications for mating-system and life-history evolution are only beginning to be understood. The well-known sneak-guard model predicts that sneaks will win in sperm competition. We now provide empirical confirmation of this prediction. Bluegill sunfish (Lepomis macrochirus) have both sneak (cuckolder) and guard (parental) males. ...
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in male reproductive success, and thus amplifies pre-copulatory sexual selection [4]. In red flour beetles, for example, male precopulatory attractiveness is positively associated with success during sperm competition [5], and in guppies, more ornamented males sire more offspring when the sperm of two males are artificially inseminated in equal numbers [6]. Male mating advantage more generally ...
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Deleterious mutations can accumulate in the germline with age, decreasing the genetic quality of sperm and imposing a cost on female fitness. If these mutations also affect sperm competition ability or sperm production, then females will benefit from polyandry as it incites sperm competition and, consequently, minimizes the mutational load in the offspring. We tested this hypothesis in the gupp...
متن کاملSperm competition
The existence and evolutionary significance of sexual selection through sperm competition was first realized by Geoff Parker in a prescient and influential review published in 1970. Parker recognized that competition between males for fertilizations will continue after mating, if the sperm of two or more males overlap near the site of fertilization in females. The process of sperm competition w...
متن کاملSperm competition in mammals.
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...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of London. Series B: Biological Sciences
سال: 2001
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2001.1625