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The aim of this study is to present a retrospective and comparative evaluation of the trends in the biomass dynamism for 9 species of fishes. The course of fish exploitation during a yearly period and the size of fishing at the time of spawning have been critically stressed in the study. Position and degree of mass dominance for separate species of fishes in fishing have been established in consecutive decades and for the whole 40 years' time. Pairs of superdominants and eudominants with the greatest quantitative participation have been distinguished in the fishing from Gardno and Wicko lakes.