Ecological and physiological state of fish fauna small rivers of the Southern Urals

For the purpose of studying of an ecological state of a waterway of river of Demadang the content of heavy metals (Zn, Cu, Ni, Mn) in muscular tissue of fishes is estimated and the analysis of hematologic indicators of blood of fishes with use of the Gemoskrin analyzer, biochemical characteristics with use of the Ensor-II analyzer is carried out. Researches were conducted during 2013-2014. Determination of concentration of heavy metals was carried out by method of a nuclear and absorbing spectrophotometry. The content of zinc in muscular tissue of fishes of the Dyoma River changed from 8.78 to 20.37 mg/kg and doesn't exceed the admissible level of concentration of metal, however the maintenance of Zn (17.80 mg/kg) exceeding physiological norm was noted in the fishes caught above a confluence of river of Miyaki. Indicators of presence of copper at muscular tissue of the studied fishes varied slightly (from 0.35 to 0.50 mg/kg), significantly conceding to maximum permissible limit. Concentration of nickel changed in the range of 0.11-0.28 mg/kg and corresponded to standard indicators. It is established that the quantity of erythrocytes, level of hemoglobin, cholesterol and creatinine in blood of the bream and a pike perch will be coordinated with standard physiological parameters. Pathologies of a liver and intoxication at the studied fishes it isn't revealed. The data obtained during research testify to a normal physiological state of fishes of a waterway of the Dyoma River and indicate satisfactory quality of natural waters, their suitability for dwelling and development of a ichthyofauna.