摘要：The present study was conducted to determine the heavy and essential metals, chromium, cadmium, copper, lead, iron, zinc and manganese concentrations in gill, liver, kidney, intestine and muscle of the available freshwater fish Mystus vittatus, Heteropneustes fossilis, Glossogobius giuris, Notopterous notopterous and Tilapia mossambica of the Perumal lake Cuddalore district, Tamilnadu, India collected during the January 2011- December 2011. Heavy and essential metals concentrations varied in significantly depending upon the type of fish tissues and locations. In the selected freshwater fish, liver tissues appeared to have significantly higher tendency to bioaccumulation of chromium followed by Cd, Cu, Pb, Fe, Zn and Mn. The maximum level of chromium was found in the liver tissue of Heteropneustes fossilis, while the minimum level of zinc was observed in the muscle tissue of Notopterous notopterous. Among the analyzed metals chromium, cadmium, iron, zinc and manganese levels were exceed the WHO recommended limits. Copper and lead levels within the permissible limits for human consumption might be representing a risk for human health.
关键词：Bioaccumulation;Freshwater Fish;Heavy and essential metals;Perumal Lake
