Sexual tactics of animals

The last line to wait for some other guys to rain with his wife is unbelievable for men. But in the animal world and especially insects, the last one is the one who is most likely to be a father.

Researcher David Hosken (Photo: uec.ac.uk)

From dwarf chimpanzees to fruit flies, males always have to line up to be " graceful " by their children. Many studies have shown that the last male to be granted " grace " is the most successful child in making her pregnant. No one understands why.

Two researchers at Exeter University in England, David Hosken and David Hodgson, said they found the answer.

Males eventually take advantage of sperm-friendly environmental advantages created by previous males. Guys produce hundreds of millions of sperm into the female reproductive tube, but most cannot reach the egg for fertilization. In mammals, only 0.001% of the sperm produced will reach the target.

"It's the female reproductive tube that is a grim environment with sperm , " Hodgson said.

He said the female genital acidity could kill a lot of sperm, because the child's immune system considered sperm as strange objects and attacked.

(Photo: uec.ac.uk)

Male semen can help regulate this acid environment. Therefore, while waiting in line, the males can eventually take advantage of the fluid previously released by the males, creating a less toxic pathway for its sperm to reach its destination and pass sperm for eggs.

After all, it means that he does not need to produce many sperms because the probability of success is higher. " They can adjust their behavior and investment to maximize their ability to be a father while minimizing lost resources ," Hodgson said.

The result is applied to all creatures that females relate to many males at the same time. The festival should take place very quickly so that the male can take advantage of the material effects of the sperm of the previous animals.

MT