A Study on the Processes of Distribution, Accumulation and Transfer of Copper (Cu) in the Organisms of Fishes

By applying mathematical approaches we studied the distribution of copper in organs and tissues of Alburnus alburnus and Perca fluviatilis from "Topolnitsa” Dam Lake. A deposit of the metal in the kidneys and liver was recorded. We found out that the surveyed species are macroconcentrators of cadmium and zinc and there is a process biomagnification of heavy metals in the trophic levels.