[INFLUENCE OF THE MOTHERHOOD EXPERIENCE ON THE FORMATION OF SPECIES-SPECIFIC BEHAVIOR OF THE OFFSPRING IN EARLY ONTOGENY].

The effect of maternal experience on the maturing of early behavior reactions and species-specific defensive behavior (dark preference reaction) in the offspring of Wistar rats was investigated. We found differences between maternal behavior of primiparous females and the same females after second parturi- tion. The behavior of experienced female is characterized by maintenaning a more comfortable state in the nest, and more care for the offspring. The study of the dynamic of behavior in the offspring of primiparous females revealed the disappearance of the correlation between the timing of opening the eyes and the appearance of the first offspring behavioral responses, which is a negative factor for the formation of adaptive behavior in ontogenesis. A violation of the development of a species-specific defensive behavior (dark preference reaction) was found in the offspring of naive females. The results indicate a positive in- fluence of motherhood experience on the formation of functions of their offspring.