THE SURVEY AND COMPARISON OF HEAVY METALS HG, CD AND PB IN THE TISSUES OF LIZA ABU IN THE KAROON AND DEZ RIVERS IN KHOOZESTAN PROVINCE

Introduction: The heavy metals are from the pollutants which create too much problems in aquaticecosystems for aquatics and human. This study was done on concentration of heavy metals Hg, Cdand Pb in the muscle, liver and gill tissues of Liza Abu in the Karoon and Dez Rivers in KhoozestanProvince in winter 2010.Material and Method: In this reaserch 216 sample of Liza abu were used randomly. Metals wereextracted from the tissues using wet Digestion method and concentration of the heavy metals wasmeasured by Atomic Absorption Spectrophotometer Perkin Elmer 4100. Analysis of the data wasdone by using of the SPSS17 software and analysis of the t-test determined exist or non-exist of thesignificant difference in level 95 (P=0.05).Results: The highest concentration of Cd, Hg and Pb 0.540±0.264, 0.027±0.002 and 1.08±0.128mg/Kg and the determined lowest concentration of Cd, Hg and Pb 0.346±0.040, 0.903±0.037 and0.023±0.001 mg/Kg.Discussion: This study showed there is not any significant difference in concentration of heavymetals Hg and Pb in muscle, liver and gill of Liza abu in Karoon and Dez Rivers. There was asignificant difference in Concentration of Cd in muscle and gill (between (P 0.05).