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Summary Information on possible effects of pollution on fish life is reviewed with special emphasis to the North Sea. Concentrations of heavy metals are high in onshore waters, sediments and organisms. Offshore regions are considered to be not endangered. In estuaries concentrations of certain...
Summary During an eight years period the onset and development of piscivory of 0+ pikeperch was studied in the natural environment of a shallow, eutrophic Dutch lake. In some years the piscivory started as early as halfway June at a pikeperch size of circa 20 mm. The 0+ pikeperch predated mainly...
Summary Enzym‐electrophoretic examination for species identification of wbitefish (Coregonus lavaretus wartmanni Bloch and C.l. macrophthalmus Nüsslin) of the upper pan of Lake Constance, Federal Republic of Germany
Summary In laboratory research, the rainbow trout has become a counterpart to the white rat, because that fish is an adaptable species available in much of the developed world and stocks from egg through adult are available throughout the year. Moreover, many strains are recognized, and their...
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