Anthropogenic changes in fish assemblage of the lake Imandra

In the paper some changes in fish assemblage of the lake Imandra in conditions of an anthropogenic effect have been studied. Outcomes of such effect are the violations of geochemical cycles in the systems, change of a hydrochemical mode, deviation in implementation of different internal processes in pools, and also accumulation of different polluting ingredients. It affects the frame and structure of fish assemblage, operation of water assemblages, biodiversification and bioproductivity of the pool. The tendency to reallocating separate views in general scheme of fish assemblage and oscillation in weight and linear parameters of separate views of fishes have been considered as changes for fish assemblage of the lake. Possible causes of these changes and their nature have been analysed as well.