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Heavy metals accumulation in muscle tissue of Tenualosa ilisha in Karoon River and its Comparison with Global Standrads

Authors:
[ Nikpour ] - Faculty of Marine Science- Khorramshahr University of Marine Science and Technology
[ Sadough Niri ] - Faculty of Marine Resources- Khorramshahr University of Marine Science and Technology
[ Rajab Zadeh ] -
[ Ahmadi ] -

Abstract:

In this study we assessed concentration of heavy metals (Cd, Pb, Cu, Co, Ni) in the muscle tissue of Tenualosa ilisha caught from Arvand and Haffar parts of Karoon River in Abadan and Khorramshahr cities in spring 2006. After biometrical measurements, the muscle tissues of 33 randomly selected fish were separated. Metals were extracted from the tissues using chemical digestion method and pure nitric acid. Concentrations of the heavy metals were measured by AAS. Mean concentrations for Cd, Pb, Cu, Co, Ni (0.119±0.034, 1.013±0.027, 2.309±0.823, 0.867±0.330, 4.004±2.701 ppm/dry weight) were compared with the international standards such as WHO, UK (MAFF) and NHMRC. A t-test showed higher than normal concentration of Cd in the muscle tissues. We found a positive linear relationship between accumulation of Cadmium, Cobalt and Nickel with total weight and standard length factors. There was no significant relationship between accumulation of Lead and Copper with the biometrical factors of sampled fish.

Keywords:

Heavy metals, Hilsa shad, Tenualosa ilisha, Muscle, Karoon River