- Dec 9, 2020
- Dec 26, 2019
- Aug 29, 2019
About devotion Reksov and their time of unusual emotional connection with the owner wrote much, but what nature of this phenomenon? The American scientists from the universities of Princeton and Oregon were engaged in studying of behavioural characteristics of 18 dogs and 10 wolves who were brought up by people. Researchers came to conclusion that the hyper sociality of dogs was a syndrome of the elf.
Dogs and wolves treat family of canids. At them much in common, but even the gray forest predators which grew near the person behave differently , than their cultivated distant relatives:
Earlier British and Brazilian scientists described interesting ability of pets to distinguish a mimicry and intonations. It turned out that dogs are capable to define an emotional condition not only of the fellows, but also the person. At the same time the most expressed effect was noted at coincidence of the image to the sound accompanying it.
Abilities of the cultivated animals and their wild relatives in identical situations were studied by the American researchers. Attention was paid to influence of social behavior.
What impact on performance of an objective such external factor how presence of the person can have? Work of scientists was carried out in several directions.
Reaction to familiar and new people was studied. Interest in objects showed animal both groups, but dogs showed more often desire to communicate and make contact with strangers.
Experimental was offered to find the food hidden in a box. Dogs distracted from performance of search, reacting to the assistant and expecting it reaction. Wolves coped with a task equally, without paying attention to presence of the person.
The person on the seventh chromosome has a special site: if on it genes are broken or lost, the elfin syndrome develops. Otherwise it is called on surnames of the scientists who described it — Williams-Beurena. are characteristic Of this disease:
the Last sign is shown in the form of the increased trustfulness and affection. Extent of manifestation of a syndrome depends on weight of violations of the site of DNA.
It appeared, as canids have similar genes , only they are localized on the sixth chromosome. In the course of studying of chromosomes on the sixth of them genetic variations were found, and found them in wolves in smaller quantity.
The more genes were changed, the social behavior was expressed stronger. To the contrary, animals with the least expressed variability were aloof , their behavior as much as possible approached that at individuals in the wild nature. At the same time at dogs wolf habits were shown.
Researches allowed to define loci (sites of chromosomes), changes in which caused existence, and quantity of mutations — manifestation of a syndrome: Cfa6.6, Cfa6.7 and Cfa6.83. Researchers claim that results of their experiences animals have first certificates on influence of a gene of WBSCR17 on manifestation of sociality . Communication of other genes — GTF2I and GTF2IRD1 — on manifestations of hyper sociality is earlier confirmed.
Scientists suggested that the variability of gene structure in the sixth chromosome made possible domestication of wild dogs. The directed selection fixed these mutations. The situation can be characterized shortly: the kindest survive. Information on work of scientists was placed in Science Advances.