American researchers have found out the reason for the monogamous and polygamous behavior of males in nature. The answer was found in the genetic system.
Scientists have conducted several studies in which males of birds, frogs and fish took part. Moreover, in the group of each species there were five polygamous and five monogamous males.
Researchers were interested in the question of how the evolution process affected the fact that some males want to be with only one female, and some with different females. To study the topic, a time interval of 450 million years was allocated to the period when each species had a common ancestor with the others.
Scientists analyzed and compared specific gene expression in the brain of selected animals. Then they discovered patterns in the activity of genes of different species, which helped identify 24 genes associated with monogamous mating systems.
It turned out that certain genes work better for some males, thanks to which the brain can adapt better and, using memory, find and feel its partner. The researchers decided that, perhaps, this allows the brain to better adapt and to find and feel its partner through memory. The researchers decided that perhaps the presence of a nearby recognizable partner makes him “useful” for survival and joint offspring.
But scientists believe that at the moment it is still too early to compare the monogamous and polygamous behavior of humans and animals. For this you need to conduct a number of studies.