competition or cooperation? What is under evolution to biological factors as a successful strategy depends to a certain Aaskäfern from the family environment. If the parents are as a feed dispenser for the place, it should pay off for the larvae to compete for parental attention. Among larvae that grow up without such care for the brood, it should go rather like siblings in a cooperative. This hypothesis can confirm scientists to Darren Rebar from Emporia State University in Kansas, and Nathan W. Bailey of the University of St Andrews, as they studied the brood care of the Aaskäfers Nicrophorus vespilloides.
beetles of this genus are due to their necrophiliac tendencies under the name of “gravedigger” is known: Of Aasgeruch lured to find the adult beetle is a small dead animal, such as a mouse, which can be used as a nourishing Nest for the offspring. First of all, the grave-digger to remove a large part of the coat, roll the carcass to a ball and burying what lies beneath, upwards. In this manner, buried, the larvae of the dead animal to a feeding package for the Beetle. Often the care of the parent goes even further: they feed the larvae collect in a small depression on the meat package, regularly with Vorverdautem. Sometimes only one parent takes care of, however, is so committed with the Progeny, or none of both.
to get in to, If no one served, the lining of the mouth meet, it’s at the expense of siblings, if possible, large portions. Instead, the beetle larvae on the meat package, on which you squat to back, with their own mouth witnesses to the body. To find out whether Evolution promotes under these circumstances, cooperative behavior, the researchers collected in the English County of Cambridgeshire many copies of the desired grave-digger-species and bred them in the laboratory. The descendants of these genetically diverse flock were divided into two populations, and 22 generations long kept separate. In a Population, the parents fed their larvae, and in the other they were detained, remember always.
Sync out of the Egg crawled
As Darren Rebar and his colleagues in the “Proceedings” of the American National Academy of Sciences reports, were grave-diggers, who had to come out as larvae without parents clearly compensate for this loss after 22 generations back. They developed, on average, as well as conspecific with parental food gifts.
this Evolution to benefit a greater willingness to cooperate only biological siblings, obviously. The observed researchers to Darren Rebar, as they were joined by larvae of another family. How the cooperation works, was, however, not yet clear. Presumably, the young gravedigger, help each other by crawling quite synchronously from the Egg, and the available flesh together with your mouth tools. In addition, the larvae may secrete a fluid for the benefit of the entire sibling char harmful microorganisms at Bay.
As a measure of good health, the body weight, with a beetle larva withdraws, in order to pupate applies. The doll case is a weighty larvae hatch particularly handsome gravedigger. Accordingly, their chances to defend a dead mouse against the competitors to prepare as a nursery are. The question of why so many parents feed their children individually with liquid food, if the co-operative young thrives, but even without these subsidies good? Unlike in the laboratory, the living conditions in the wild are very changeable. Well possible that the absence of the parents can be sometimes compensated effortlessly through fraternal cooperation, support, under other circumstances, is, however, indispensable.
