Why is the male more likely to take care of caviar in fish (5 photos)

When conception occurs in open water, the chances of sloping off rearing offspring in males and females are almost equal. However, due to For certain reasons, males are much more likely to stay with children.





Procreation is a responsible business and in many ways complex. It is not surprising that many animals trying to throw off the backbiters and saiga away into the sunset from responsibility. Nine out of ten species push this role for one person. But why among woolly and feathered everything falls on the mother's shoulders or on two at once, while in the underwater world is a lone dad heroic?

Rybyoh is clearly not praised for parental qualities. Of the 181 families studied, 100 introduce their children with independence even at the stage of caviar according to the system "sweep and forget". In 19 more confusion reigns by species - some representatives look after for offspring, some - no. In total in 17 families rearing is done by the female. And thrives at 47 motherhood. From the figures it is more than obvious that the severe male education in fish is a priority. Why? The answer is simple: external fertilization and polygamy.



When conception occurs in open water, the chances mow down from the upbringing of offspring are almost equal. Who quicker - that and childfree. This is where the males lose this race. First, many fish species are territorial. Males are actively extinguishing each other in an attempt to capture a patch of sand and algae from competitors. Future fathers can't just take and leave the area.





Some fish retain not only caviar in their mouths, but also fry until they become independent.

Secondly, the process of conception of a new life is initiated by females. It is they who are the first to spawn, and only then the male releases his genetic material. While dad fertilizes all the eggs - mom already have time to wind up for bread. So the male is left alone with fish. Therefore, motherhood for most fish has become the only an alternative to a complete lack of care.



In mammals and birds, the opposite is true. new, terribly advanced internal fertilization technology and gadget like the placenta left no choice. The last one left with offspring - female. It is she who gives birth to a child, it is she who lays eggs. But the male in the process of the appearance of offspring participates only at the stage of conception. And after it nothing does not keep near the children purely physiologically!



The complete opposite of all of the above is the seahorse. Their males literally get pregnant by stuffing their eggs into their belly pouch.

It's pragmatic. Evolution just determines who will spend all his strength on a precious child, and who needed only as a source of half of the genes. And all for the sake the sole purpose of procreation is to replace dying individuals and shuffling of genes.