Sperm whale testicle size
It is the only living member of the genus Physeter and one of three extant species in the sperm whale family , along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. The females cooperate to protect and nurse their young. Females give birth every four to 20 years, and care for the calves for more than a decade. A mature sperm whale has few natural predators, although calves and weakened adults are sometimes killed by pods of killer whales orcas.
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QI: some quite interesting facts about whales
5 Things You Probably Didn't Know About Testicles | IFLScience
According to a viral message, the typical blue whale produces more than gallons of sperm when it ejaculates, a factoid offered up to explain why the ocean is salty. In reality, even the largest whales only ejaculate up to a few gallons of semen at a time, and this ejaculate has nothing to do with the saltiness of the ocean. This whale sperm myth has been around since , circulating through a chain email that sometimes includes a picture of a sea creature with a large appendage. The saltiness of the ocean comes from the erosion of rock , a process that creates electrically charged particles known as ions. Runoff from rivers and streams carries these ions into the ocean, where they accumulate over time. The most common ions in the ocean are sodium and chloride, the components that make up salt. As for the viral message above, it's a two-part hoax.
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5 Things You Probably Didn't Know About Testicles
So sit back and relax as we tell you a thing or two about balls. Sperm, more scientifically known as spermatozoa, are made in vessels within the testicles called seminiferous tubules. The average fertile man produces 40 to 60 million sperm cells per milliliter of semen, and testicles create about million sperm every day. The biggest testicles in the animal kingdom belong to the tuberous bushcricket , also called Platycleis affinis , at least in relation to its body mass. Testicles like to be cold , which is why your body tells them to hang down when you are warm.
North Atlantic right whales have the largest testicles in the animal kingdom. But how is having large testicles an advantage for male right whales? Why did evolution favour this characteristic?