The aroma essential on grounds of sex

For many species, males may determine by scent if a female is blank.

In a light, a man passes near a female and collect their fragrance.

Fascinated, returns to pick up his feeling that perhaps she always waiting.

Identified in this moments memory is not exactly an indication that females can be a companion for life. Male conducted 'smell', literally, is that your potential partner is blank.

This technique is used by many species, like lemmings, a species of mouse can be found at Mexico (Microtus pennsylvanicus), lizards, beetles, spiders and bees.

And only now scientists are beginning to understand how important is the sense of smell in animal courtship.

Males of different species can determine not only if a female is blank but still how many previous couples had, according to research published this month in the journal of biological reviews.

Lemming Brown (Lemmus sibiricus) prefer the smell of a Virgin female mate just another.

In some rodents, men can even determine how men was a female.

Everything indicates that the smell of the one case and a another woman is different, because it produces various chemicals.

The world of insects is also permeated by the aroma of sex. When a species of fly (Agromysa frontella) is more blank low production of a chemical substance which determines the smell (3.7 dymenthylnonadecane).

There were few studies on the role of the aroma of sexual behavior and most refer to insects, researcher says Melissa Thomas, the University of Western Australia, Crawley, author of the last survey.

Animals seems to use aroma to communicate her sexual status in three different ways.

First of all to find a male, the female can push other potential partners.

Whether a female is blank can have benefits for both sexes.

Secondly, after mating, the female should produce pheromones, chemicals that attract men.

This occurs in the case of a moth (Lymantria dispar) and allows the female can move without harassed by other males.

Finally, men may transfer chemicals on the female during copulation, rub "flavors" to scare opponents.

When copula Drosophila (Drosophila melanogaster) the male transfers to the female contact with a substance called 7-tricoseno.

Other species, the transfer is much more intimate. Some butterflies and moths, for example, certain substances in the male sperm block the production of the female pheromones.

And in-kind a bee (Osmia rufa) the male rubs female mate, covering its wings with a substance that indicates which is no longer a Virgin.

Why nature has evolved this way?

Monogamous animals who have only two time pheromones same language allows both sexes.

Men should not waste time looking for does not receptive females and females are not persecuted by more than a cock at the same time.

For women with multiple partners, find that a Virgin represents the great advantages for the male as his semen should not compete against other rivals.

For some females changes can be permanent, with a fall of pheromone production never returns to its previous level.

The power of smell is extraordinary rodents as Microtus pennsylvanicus. They can determine not only if the female is blank, but the presence of other males with stakeholders how much sniffing a copulado.

An example is extreme, but it seems that the smell is an essential component of the complex sexual game.

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