Tuesday, May 19, 2015

British scientists have found out why we need males – BBC Russian

  • 20 May 2015

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In the arsenal of the fight for the attention of the opposite sex in men, there are different means of …

sexual reproduction – a complex and is not the most effective way of extending the race, however, according to the report published in the journal Nature, the sexual selection plays a critical role in the evolution of species.

Reproduction by a number of disadvantages, why approximately 3 million species prefer this method?

After all, the search for the right partner takes time and effort, and then where is the guarantee that the children will have the best genes from the parents? Is it too difficult for all coherent theory of Darwin?

There are other ways of reproduction and population consisting entirely of females, is able to produce more offspring.

So why males are needed if all their contributions to the procreation is Transfer of the seed?

The answer lies in the evolutionary advantages that gives sexual selection.

From the life of insects



Sexual selection – a powerful evolutionary force that determines who is destined to take part in procreation

Matt Gage, Professor of Evolutionary Ecology of the University of East Anglia.

To determine how important sexual selection evolution, scientists for over 10 years in the laboratory studied the behavior of beetles or flour beetles.

They varied the number of males and females in the control groups to understand the importance of intraspecific competition.

Within seven years after the change of 50 generations of beetles, it was found that males, the most actively fighting for the females, were healthier and less prone to various diseases.

At the same bugs that were able to mate without a fight over females, become extinct within 10 generations.

The benefits of sexual selection

“Sexual selection – a powerful evolutionary force that determines who is destined to take part in procreation,” – explains the professor of evolutionary ecology Matt Gage, who led the research at the University of East Anglia .

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The plumage of a peacock – a great example of the most attractive male

According to Professor Gage, sexual selection provides a strong spread of genes and prevents the growth of bad genes, so that the element of struggle among males provides improved genetic health of the population.

To attract females, males have to fight with rivals and those who emerged victorious in this fight, as a rule are good in everything else. So sexual selection is an important and highly effective filter in the maintenance and improvement of species.

So all these courtship and lush colors that we see in nature, play an important evolutionary role, contributing to the survival and prosperity of the species.

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