Identify and change copper, chromium and cobalt in muscle edible tissue of Catfish (Silurus Glanis) sampled of the Anzali wetland

Catfish of Anzali wetland has been focused economically and commercially. It also meets the religious Minorities needs to fish meat. So, investigation of its health in the wetland is important. This study aimed to investigate the concentration of heavy metals such as cupper, chromium and cobalt in muscle tissues of Catfish in three stations (west, central and east) of Anzali wetland in 2012. In this study, 10 samples having standard weights were selected randomly from each station by fishing net. The atomic absorption set was used to measure the concentrations of heavy metals. The results showed that the average concentration of cupper metal in the Catfish were 3.77, 2.5 and 2.2 μ g / g dry and the average concentration of chromium metal in the Catfish 0.05, 0.04 and 0.05 μ g / g dry were observed for West, Center and East of Wetland, respectively . The average concentration of cobalt metal in the Catfish 0.02 μ g / g and was not distinguishable in the Center and East wetland by set. In this study, concentrations of cupper, chromium and cobalt in Catfish were not significant among the studied stations (P > 0.05). Cupper, chromium and cobalt levels were compared with standards determined by food and Drug of America (FDA) and world health organization (WHO). Results showed that levels of cu, co, cr toxicities were fewer than the standards reported by FDA and WHO.