[The peculiarities of accumulation of 137Cs in fish of the highest trophic level from the reservoirs polluted by radioactive nuclides as a result of the ChNPP].

In this paper, we analyze the results of long-term investigations of 137Cs accumulation in the specimens of fish of the highest trophic level, pike and pike perch, from the reservoirs suffered as a result of the ChNPP. Annual, seasonal and age peculiarities of accumulation of the 137Cs specific activity in the predatory fish from the Kiev reservoir and Teterev River were considered. It was shown, that during the whole time of radioecological investigations the pike was characterized by the higher level of 137Cs specific activity muscles in comparison with other predatory fish, in particular, pike perch. Intimated relationship between seasonal, age and sexual differences in 137Cs accumulation in fish organisms and types of feeding were revealed.