Average male can produce roughly 525 billion sperm cells over a lifetime, at least one billion of them per month or between 40 million and 1.2 billion sperm cells in a single ejaculation.
Sperm competition: males, of nay species, get as many of their own sperm near a fertile egg as possible. Genes of the smaller sperm producers are eventually weeded out of the population and become a footnote to evolutionary history.
Fertilizing an egg is not just about how much sperm you can produce. It is also about how close you get your sperm to it.
In gorilla society, one male defends a harem of females to ensure only his sperm gets anywhere near their eggs. In this case, making a lot of sperm doesn’t really help the male gorilla get the job done.
In chimpanzee society, many males and females live together in large troops, and females have sex with many males in a short span of time. This is why male chimpanzees possess the largest testes of all the great apes, weighing in roughly 15 times larger than gorillas, relative to their body weight. This gives them a better shot at swamping out the competition.
Between gorillas and chimps are human males. Mans average testes are roughly two and a half times as big as a gorillas but six times smaller than a chimps.
Researchers questions whether sperm competition was ever at work in human societies, or whether our relatively large testes are just a hold over from an earlier period in our evolutionary history.
via Scienceline.org
Sperm competition: males, of nay species, get as many of their own sperm near a fertile egg as possible. Genes of the smaller sperm producers are eventually weeded out of the population and become a footnote to evolutionary history.
Fertilizing an egg is not just about how much sperm you can produce. It is also about how close you get your sperm to it.
In gorilla society, one male defends a harem of females to ensure only his sperm gets anywhere near their eggs. In this case, making a lot of sperm doesn’t really help the male gorilla get the job done.
In chimpanzee society, many males and females live together in large troops, and females have sex with many males in a short span of time. This is why male chimpanzees possess the largest testes of all the great apes, weighing in roughly 15 times larger than gorillas, relative to their body weight. This gives them a better shot at swamping out the competition.
Between gorillas and chimps are human males. Mans average testes are roughly two and a half times as big as a gorillas but six times smaller than a chimps.
Researchers questions whether sperm competition was ever at work in human societies, or whether our relatively large testes are just a hold over from an earlier period in our evolutionary history.
via Scienceline.org
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