Multivariate statistic analysis of the world population ageing is devoted to the issue of the
ageing of population, which is one of the global problems of the modern world
Population Characteristic of the Volga zander Sander volgense (Percidae) in the Kuibyshev reservoir© 2016, Pleiades Publishing, Ltd.The analysis of the
size composition,
age structure, linear growth
Basic biological parameters of white-eye bream Abramis Sapa of the Kuibyshev Reservoir. The parameters such as gender,
size and
age structure of white-eye bream were