EFFECT OF INTENSIFICATION MEASURES ON HYDROCHEMICAL REGIME OF PONDS AND HEAVY METAL CONTENT IN WATER AND TISSUES OF CYPRINIDS

There are presented results of studies on the state of hydrochemical regime and heavy metal content in water and tissues of cyprinids during a three-year turnover of intensive rearing. It was found that rational feeding of fish and use of other intensification measures (lime, ammophos, superphosphate, organic meanures) do not contribute to the contamination of ponds but ensures high percentage of fish output and normative average fish weight. It was found that cyprinids do not accumulate heavy metals in muscles until the age of three years under conditions of their rearing during a three-year turnover.