Linear hierarchy of chickens of the Avicolor breed

The behavior of birds in a group represents a different level of interaction, competition between individuals in the composition of animals located in limited areas. The hierarchical relationships of individuals are explored by monitoring various interactions, mostly “negative”. The paper uses an analysis-experiment of behavior in competitive situations. Using methods - behavioral characteristics in birds (K. Lorenz, 1930), pecking order (T. Schelderup-Ebbe, 1922), community organization (McBride, 1959) - a study was conducted on the interaction of chickens of the Avicolor breed. In the study, “tournament tables” were compiled based on ethograms, in which the number of pecking of chickens among themselves for a specific period of time was noted. Next, we form a table that will show the number of pecks of the chicken that hit other members of the group - a vertical column, and the number of blows that this chicken received from other participants - a horizontal column. In this study, an analysis is presented for the behavior of chickens, which was a linear hierarchy, where K was the dominant individual, in which the newly introduced individual T ranked seventh. After the removal of the dominant (individual K) from the group for a certain period of time, the individual T occupies the first rank position, and after the return, the individual K occupies a dominant position. It is assumed that the hierarchical ranking that singles out the most capable individuals gives them preferential success in the process of natural selection.