Native fish species as a test - objects for the investigation of the hydroecosystem existent state

Abstract

The diagnostic method of first deviations in the most sensitive components of biotic groups is described. Morphological parameters of bone fish liver were used as biotest-systems of ecological monitoring. Forecasting of the toxicant influence on the native ichthyofauna state by morphometric indices of internal parenchymatous fish organs became possible. We have proved that protoplasmic and hemolytic toxicants have break the cell metabolism, causing dystrophy, erythrocyte decomposition, and cell necrobiosis in the fish liver. The obtained results can be used for diagnostics of various types of hydroecosystems, and also they can be a scientific basis for preservation of biological diversity of the ecosystem in conditions of increased anthropogenic loading.