Risk of Heavy Metals (Copper, Zinc, Lead, Cadmium and Chromium) on the Life of Fish in Anzali Wetland Ecosystem

Heavy metals are part of the environmental pollutants and have the capability of aggregation in various aquatic tissues. In this study, the concentration of various heavy metals (Lead, Zinc, Copper, Cadmium and Chromium) was measured by atomic absorption method in water of different parts of Anzali wetland and different fish muscle tissue )Esox lucius, Cyprinus carpio, Chalcalburnus chalcoides, Abramis brama, Carassius carassius). The results showed that the highest concentration of metals in water media related to Zink (1. 77± 0. 06 mgl-1) which was measured in the central part of Anzali wetland, Also, the lowest concentration of metals related to Chromium (0. 027 ± 0. 01 mgl-1) was measured in the western part of Anzali wetland. In this study The highest concentrations of the elements measured in the fish muscle tissue belong to the zinc element (26. 34 ± 4. 45 µgr /g) for Esox lucius and the lowest concentrations of the elements belong to the cadmium element (0. 1±0. 09 µgr /g) for Chalcalburnus chalcoides. The results of the risk assessment of the heavy metals on the life of Anzali wetland ecosystem indicate that two elements of cadmium and zinc in water for Anzali wetland fish are at high potential risk.