Study on morphological changes frequency in carp young fishes reared in radiation contaminated ponds

Increased levels of morphological changes in carp young fishes reared in the fish farm located in the area with cesium 137 contamination density from 1 to 5 Ci/km2 (37 - 185 kBq/m2) were revealed. Increased frequency of morphological changes occurrence was observed in experimental ponds with specific gamma-activity of their bottom. Sediments from 801 to 3235 Bq/kg in 1988-1990 compared to morphological changes in fish from the control ones (specific gamma-activity of bottom sediments from 52 to 307 Bq/kg). Formation of the regression function for the whole body of evidence over 1988 and 1990 has shown that Y (frequency of fish morphological changes) depends on X (fish gamma-activity) in the following way Y=1,081*X0,506. So, an increased amount of fish with morphological malformations in radiation contaminated ponds is due to chronic influence of raised radiation background