Elephant sperm journey

New research indicates that the size of the body is the reason why mice's sperm is longer than elephants'. There is an inverse proportion between the body size and the length, according to ameripublications. Strangely, when multiple males mate with the same female , the sperm competition becomes important for evolution of sperm size, says the University of Zurich. The longer sperm is always more competitive, especially in smaller rodents.

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Mouse Sperm Longer Than Elephant Sperm

Electro-ejaculation: the business of collecting elephant sperm | Public Radio International

A fruit fly produces the longest sperm known to science. Why do tiny animals make big swimmers, but large animals make small ones? There are competing ideas about why sperm size differs among animals. One idea holds that small animals and large animals have wildly different metabolic constraints. Small animals with high metabolisms are better able to produce new sperm cells than large animals that form new cells more slowly. The other idea has more to do with the female than the male.

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What it’s like to retrieve elephant sperm in the name of conservation

Skip to content. Just when you thought masturbating over a JC Penney underwear catalog in an IVF clinic was an unfortunate way to breed, think about what poor elephants must go through these days. A probe is inserted about three or four centimeters into the lower intestine, near the gonadal nerve center. This is then stimulated with a 5 to 15 volt charge that causes a contraction of the entire reproductive tract, which leads to the sperm being forced out. Because elephants in captivity are getting too inbred, which is why every couple of years Dr.

Like salmon traveling upstream to spawn, sperm cells are extremely efficient at swimming against the current, according to research to be published this week. The discovery, to be published in the journal eLife by researchers at MIT and Cambridge University, may help us to understand how some sperm travel such long distances, through difficult terrain, to reach and fertilize an egg. Of the hundreds of millions of sperm cells that begin the journey up the oviducts, only a few hardy travelers will ever reach their destination.

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