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Sperm competition is a term used to refer to the competitive process between spermatozoa of two or more different males to fertilize the same egg during sexual reproduction. Competition can occur when females have multiple potential mating partners. Greater choice and variety of mates increases a female's chance to produce more viable offspring. However, multiple mates for a female means an individual male has decreased chances of producing offspring.Sperm competition is an evolutionary pressure on males, and has led to the development of adaptations to increase males' chance of reproductive success. Sperm competition results in a sexual conflict of interest between males and females. Males have evolved several defensive tactics including: mate-guarding, mating plugs, and releasing toxic s

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  • Sperm competition
  • Spermienkonkurrenz
  • Compétition spermatique
  • Competição espermática
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  • Sperm competition is a term used to refer to the competitive process between spermatozoa of two or more different males to fertilize the same egg during sexual reproduction. Competition can occur when females have multiple potential mating partners. Greater choice and variety of mates increases a female's chance to produce more viable offspring. However, multiple mates for a female means an individual male has decreased chances of producing offspring.Sperm competition is an evolutionary pressure on males, and has led to the development of adaptations to increase males' chance of reproductive success. Sperm competition results in a sexual conflict of interest between males and females. Males have evolved several defensive tactics including: mate-guarding, mating plugs, and releasing toxic s
  • Als Spermienkonkurrenz wird die Konkurrenz von Spermien eines oder mehrerer Männchen um die Chance zur Befruchtung einer Eizelle bezeichnet. Spermienkonkurrenz entsteht, weil die Männchen aller Tierarten sehr viel mehr Spermien produzieren als die Weibchen ihrer Art befruchtungsfähige Eizellen. So werden beispielsweise selbst bei der Künstlichen Besamung von Kühen durch Bullen mit gutem bis mittlerem Befruchtungsvermögen noch 10 Millionen Samenzellen eingesetzt. Auch beim Menschen steht in der Gebärmutter der Frau während jedes Menstruationszyklus in der Regel nur ein Ei zur Befruchtung bereit, doch ein gesunder Mann gibt bei jedem Samenerguss mehrere Millionen Spermien ab.
  • Dans la nature, l’apparente extravagance des traits arborés par les mâles de certaines espèces, et leur sous-jacent impact sur leur survie, inspira Darwin dans le développement de la théorie de la sélection sexuelle. Un siècle plus tard, les biologistes réalisèrent que la polyandrie et le stockage du sperme par certaines femelles pouvaient amener à une nouvelle forme de compétition mâle-mâle postcopulatoire. En effet, la compétition ne s’arrêterait plus seulement à l’accès à l’accouplement, mais continuerait à l’intérieur même de la femelle.
  • Competição espermática é o fenômeno presente em espécies em que as fêmeas copulam com vários machos, ocasionando a competição entre eles para a fecundação do óvulo. Ela está relacionada com a monopolização e vigília das fêmeas, produção diferenciada de espermatozóides e certas características do pênis que impedem novas cópulas ou aumentam os intervalos entre elas. A competição espermática também é definida como a competição do esperma de dois ou mais machos dentro do sistema reprodutivo da fêmea para fertilizar os óvulos, sendo que a disputa continua dentro do trato reprodutivo da mesma através desta competição.
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