Animal is a curious thing, but monogamy in nature and now exists Scientific research identified genes Related to that trend. The researchers led by Rebecca Young (University of Texas) looked at five similar species of pairs, were monogamous and not others.
In the monogamous Californian mice, prairie vole rodents, alpine pipit bird, Ranitomeya imitator frog and African Central Xenotilapia fish have been selected. In the polygamists The apple trees, Microtus pennsylvanicus rodents, common bird accents, Oophaga pumilio frog and African kichlid fish were present.
As published in the PNAS journal, the men and women reported that they were at least equal to the mating season, and shared their offspring tasks and continued to defend them, and continued monogamous, although they occasionally stepped on. Among the polygamics, the male sperm spread as much as possible They had no worries with their note.
Despite being of different animals, male brain analysis It was revealed that the different expression of the series of genes was individual polygamy or single monogamy. The results seem monogamy independent that it had been created several times throughout history, as a result of the change in expression of monogamy and promiscu genes.
The authors 24 genes have been found Its activity in the brain has a strong relationship with monogamous behavior. Rebecca Young "knows that we know that some 24 of these genes are related to learning or memory, and it is possible to complete a couple's relationship or look after the offspring of a change in the cognitive processes behind social behavior."
According to the scientist, "an individual must be able to get acquainted with his partner, and find a way to create a relationship with him." Prairie vole is a favorite species to understand monogamous mammals. Unlike other animals, once the woman has finished her desire, Something happens in your brain a link that will last forever.
Researcher Larry Young (Emory University) found the secret of this lifestyle among recipients vasopressin and oxytocin in the brain regions that regulate the award. Because mechanisms are similar to those that make dependencies, the brain of these animals binds a pleasant sensation in front of a certain pair.
"For the first time, I see something like this when it's social behavior," says Young. Scientists have seen voles among humans, there are no friends and others can not be alone. He founded the system of separation of researchers: the single had a long gene that generates vasopressin recipient monogamy.