Worldwide, women live for a long time Men On average – and scientists have now discovered Competition for a partner The reason may be.
Male Mammals There are elaborate and energetic intercourse, such as a stag crashing anteler, often results Injury and low lifeResearchers at Max Planck Institute for Evolutionary Anthropology found.
Studied out of 1,176 species of mammals and birds Find out which sex lasts longerWomen mammals live on an average of 13 percent longer than men, while among birds, men live for about five percent longer.
Male mammals and birds develop characteristics such as colored signs, antilar, horn and large body shape – all reproductive success to increase success. But their lifetime can be reduced if they are polygamy and have many companions.
In polygamy mammals with strong competition, male usually dies first than women due to battling other men for a partner. On the other hand, there are many birds, mons, which means that competitive pressure is low and men often last long.
Researchers of the study published in the journal Science progressIt was also found evidence that sex that plays a role in increasing offspring – in mammals, it is usually female – goes to live longer.
In primates, such as gorillas, it is likely because the woman needs to survive until her child is independent or sexually matured.
But a genetic loss can occur which means that male mammals do not last long as male birds.
In mammals, women have two X chromosomes, while men have only one X and one Y. Some research suggests that having two X chromosomes can protect women from harmful mutation, which offers a living benefit.
In birds, however, the system is reversed: women are “mixed pair”, with Z and W chromosomes, while men have two Z chromosomes.
Even when the animals were placed in the zoo, the poachers remained safe and seen by the weights, remaining the same lifetime between the sexes.
“Some species showed unlike the expected pattern,” said the lead author Johana Strek. “For example, in many birds of hunting, women are larger and longer than men. So sex chromosomes can only be part of the story.”
Some exceptions consisted of bright and colored tail male peacocks, who still live longer despite competing for a partner. However, most birds who should compete for a partner show that their longevity gains on women.
Similarly, the female hawler remains longer than men of the monkey, marmoset and tamarind. This can happen because they are unlike other mammals.
Conversely, chimpanzee competes for peers and in captivity, the female chimps live on average for 34 years and for men for 28 – almost fifth low.