GENETIC-DEMOGRAPHIC ANALYSIS OF THE POPUL ATION OF NATIVE INHABITANTSOF THE SAMBURG TUNDRA

Genetic-demographic parameters (Tundra Nentsi, Forest Nentsi, and Komi ) of the population of native inhabitants of the Samburg Tundra (popul ation size, age and sex structure, sex ratio) are presented. The size of the portion of the population of reproductive age (35.5% of the tot al), family size (3.04), and the predominance of the portion of the po pulation under reproductive allow us to classify this population as gr owing. Results of analysis of marriage structure, mixing, and migratio n processes in the group of Tundra Nentsi are presented. It is shown, that the gene contribution of Tundra Nentsi themselves into the popula tion is 74%. The index of endogamy is 42.4%. The inbreeding coefficien t in the population is 0.003. It is demonstrated that the average numb er and variance of births for Tundra Nentsi women who have passed thei r reproductive years are 7.55 and 11.07, respectively. Crow's index of total selection (I-tot) and its components (I-m, I-f) were 0.75, 0.47 , and 0.19, respectively.