Another mans sperm outcompete



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22 Dec Or, the other man's semen gathers on the back of the coronal ridge, and the likelihood that a man's ejaculate would out-compete rival sperm.

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Larger sperm outcompete smaller sperm in the nematode Caenorhabditis elegans.


Larger sperm outcompete smaller sperm in the nematode Caenorhabditis elegans.

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Another mans sperm outcompete

9 Jul Paternity in many species depends in part on male sperm-control and by the ability of its ejaculates to out-compete those of other males over.


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Another mans sperm outcompete

Description:Advanced Search Abstract The influence of male age on reproductive success after a single mating has been explored widely; however, few studies have investigated whether quantitative or qualitative differences in male sperm are responsible for the observed patterns. Moreover, the role of male age on sperm competitive ability has been largely ignored. We examined the importance of male age on the probability and amount of sperm transferred during a single mating and explored whether sperm competitive ability varies with male age in the hide beetle Dermestes maculatus, a species where sperm viability does not vary with male age. We also investigated whether sperm transfer rates varied with female age. We found that the probability of sperm transfer and the amount of sperm transferred varied with male, but not female, age. All males performed behaviorally successful copulations, but intermediate-age and old males were more likely to transfer sperm successfully and also transferred a greater quantity of sperm than young males.

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Views: 4326 Date: 2018-05-14 Favorited: 59 favorites

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