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Heavy metals participate in chemical reactions of fish metabolism, which makes these elements a major focus on contamination studies. The objective of this study was to determine the concentrations of heavy metals Cd, Cr, Cu, Pb, Zn and Hg in muscle tissue of fish of Cassipore River Basin (State of Amapa) and environment, aiming at assessing the risk of contamination. The concentrations of Cd in Plagioscion squamosissimus (1.061 mu g g(-1)) and Pb in Poptella compressa (4.280 mu g g(-1)) had values that exceed the boundaries established by Brazilian law. The Cr concentration in P. compressa (0.937 +/- 0.5 mu g g(-1)), Pimelodella cristata (0.463 +/- 0.03 mu g g(-1)) and Cyphocharax gouldingi (0.364 +/- 0.12 mu g g(-1)) and Hg in P. squamosissimus (0.670 mu g g(-1)), Pseudoplaorstoma fasciatum (0.630 mu g g(-1)), Hop has malabaricus (0.570 mu g g(-1) e Serrasalmus rhombeus (0.548 mu g g(-1)) were above the legal limit. The water column showed high concentrations of heavy metals in all analyzed points, showing a contamination of this river basin. Therefore, the high concentrations of heavy metals in the environment and muscle tissue of fish indicate a high degree of contamination in the Cassipore river basin and risk to human health.

Contaminação por metais pesados em peixes e água da bacia do rio Cassiporé, Estado do Amapá, Brasil