Potrokhov A. Physiological and biochemical mechanisms of fish adaptation to changes in the ecological factors of the aquatic environment

The thesis is dealt will the study of the formation of the mechanisms of adaptation of Cyprinidae to long-term contamination of water bodies by the compounds of inorganic nitrogen. Ecological, physiological, biochemical, and population adaptation of fish to various environmental factors were studied in different years and seasons. The concept of viability maintains in fishes at different stages of their ontogenesis under conditions of long-term contamination of the aquatic environment by inorganic nitrogen at different temperatures and gas regime was elaborated for the first time. It has found that as a result of complicated and interrelated functioning of physiological and biochemical mechanisms of adaptation the most resistant specimens of the population will form next population of the species, which will be tolerant and adapted to unfavorable conditions.