Female Infidelity Produces Faster Male Sperm - Study

It has been difficult to prove that fast-swimming sperms have an advantage when it comes to fertilizing an egg but a research team at Uppsala University say that unfaithful females of the cichlid fish species do influence the males’ sperms - increased competition leads to both faster and larger sperms, and the research findings published in PNAS say that the much mythologized size factor does indeed count. The findings also show that the speed and the size of sperms are closely related: larger sperms are faster. These sperms swim faster thanks to the greater power of a larger flagellum, but faster sperms also need to have a larger store of energy, which in turn results in larger sperms. read more

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