Özet:

The method of biomonitoring of natural reservoirs by diagnosing early violations in the most sensitive components of hydrobiological groups has been proved. Morphometric parameters of the liver of the family Cyprinidae fish are used as biotest-system for ecological analysis.Taking into account morphometric indexes of fish internal parenchymatous organs, the possibility of predicting the toxic substances influence on the aboriginal ichthyofauna state, has been determined. It has been established that protoplasmic and hemolytic toxicants violate cellular metabolism, causing dystrophy of liver cells in fish. Morphoanalysis of the parameters of the liver of the family Cyprinidae fish, as the most widespread object of the ichthyofauna, is used as the basis for indicating in the system of biomonitoring of the water environment quality to the action of external factors and timely prevention of existing danger.The results obtained serve as the basis for the development of environmental measures to assess and optimize the ecological conditions for the conservation of biological diversity of the ecosystem. Keywords: anthropogenic loading; reservoir; hydroecosystem; ichthyofauna; the liver of the family Cyprinidae fish; liver; biomarkers; pollutants; morphological parameters References Bieniarz, K., Kownacki, A., & Epler, P. (2003). Biologia stawow rybnych. Olztyn. Bols, N.C., Brubacher, J.L., Ganassin, R.C., & Lee, L.E. (2001). Ecotoxicology and innante immunity in fish. 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