Study on Bioaccumulation of heavy metals (Cu, Ni, Co, Cr) in edible muscle tissue of Crucian carp (Carassiu sauratus) from international wetland of Anzali

This study focused on the accumulation of heavy metals (Couper, Nickle, Cobalt, chromium) in the edible tissues of Crucian. Sampling was done in 3 stations (West, Center, and East) of Anzali wetland in 2012. In this study, 10 samples were collected from each site in the standard weight by gill net fishing method and measuring the concentration of heavy metals was performed using flame atomic absorption spectrometry. results showed that the Levels of the heavy metals from maximal to minimal were Cu>Ni>Co> Cr, However concentrations of Cu, Ni, Co and Cr in edible muscle tissue crucian carp did not show the significant difference between stations (P>0.05). The accumulate heavy metals were compared with the standard of American FDA and the WHO. In this study, the toxicity of copper, cobalt, nickel, and chromium has been lower than permissible standards of WHO and FDA. According to the results, nickel showed amount near the permissible limit in Central and East Lagoon samples compared to standard WHO that must more do control over the productive resources of the metal around the basin's wetland. But crucian carp Anzali wetland hygienic in terms of being suitable for human consumption and its consumption lack the side effects for humans.