The dynamics of the demographic structure of Phrynocephalus guttatus guttatus population in Astrakhan semi-deserts

The spring settlement of Phrynocephalus guttatus guttatus Gmel. reliably splits into several age groups: 1-2 group of young, 3-4 groups of females and 2- 4 group of males. Senior group of young and two younger groups of mature individuals are aged for about a year and most likely belong to different clutches of eggs of the previous season. The overall ratio sex groups is close to unity, but that in the group of individuals of the first clutch of the year, as a rule, is dominated by females, and from the second - by males. Two older groups of mature animals have age not less than 2 years. The largest and oldest age group includes mostly females. Almost complete replacement of the population in this species most likely occurs in two years.

population, demographic structure, dynamics, Phrynocephalus guttatus guttatus Gmel