Adult four-horn sculpin (Triglopsis quadricornis), its main food item, the isopod Saduria entomon, and surface sediments from three selected areas on the Finnish (Archipelago Sea, Western Gulf of Finland) and Estonian (Central Gulf of Finland) coasts were investigated for heavy metal (Fe, Mn, Zn, Cu, Cd, Pb, Ni, Hg) concentrations in order to find out eventual relationships between the contamination of the two species and their environment. The concentrations of metals in
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