Trace metals concentration in Fregata magnificens: A case study of Coroa Grande Mangrove in Sepetiba Bay, Rio de Janeiro, Brazil

摘要

Concentrations of trace metals,cadmium (Cd), zinc (Zn), copper (Cu), lead (Pb), chromium (Cr), and nickel (Ni)were determined inMagnificent Frigatebird (Fregata magnificens)harvestedin Sepetiba Bay, Rio de Janeiro, Brazil. Mean concentration levels in liver and kidney (µg.g-1dry weight) were 8.04 and 5.57 (Cd); 66.44 and 54.64 (Zn); 45.29 and 46.89 (Cu); 44.67 and 37.35 (Pb); 2.94 and 5.02 (Cr); and 8.12 and 5.98 (Ni), respectively. Nowadays, there is growing conviction that seabird surveys provide important geographical and temporal evidence patterns of aquatic ecosystems conditions, and for this reason the present study provides new insights to use seabirds as bio-sentinel for aquatic pollutants.The results reflect higher concentrations of metals inF. magnificens. These findings are highly the importance of heavy metals accumulation in the aquatic system and portend a serious health risk to human consumption and along marine trophic chains.