Trace metals distribution in fish tissues (Cyprinus carpio and Barbus luteus) and

Abstract

Abstract:The present study was conducted to investigate the concentration and distribution of four trace metalscadmium, cobalt, copper and lead, in exchangeable and residual phases of the sediment in Al-MasabAlamm and tissues (gills, liver and muscle) of two important commercial species of fish (Cyprinus carpioand Barbus luteus) during summer season 2010. Also the present study include some physical andchemical properties of this ecosystem.The results showed clear coordination between air and water temperature in all study locations. Air andwater temperatures ranged between (34.5-39.31) ºC and (26.22-32.01) ºC respectively. PH, salinity,dissolved oxygen and biological oxygen demand ranged between (7.3-8.6), (4.3-9.01) ‰, (6.0-7.70) mg/Land (2.26-3.25) mg/L respectively. Localized variations were noticed in percentages composition ofsediment contents of clay, silt and sand. Total organic carbon ranged between (0.28-1.85) in study stations.The mean concentrations of Cd, Co, Cu and Pb in exchangeable and residual phases as follow Cd (4.22,0.14), Co (12.40, 19.33), Cu (4.76, 12.71) and Pb (29.21, 1.85) μg/g dry weight respectively.The present study showed a difference in concentrations of studied metal in different tissues of fish,these concentrations varies from one species to another and the tissues of same species showed differencesin concentration of studied metals. This due to the nature and the function of the tissue and ability of fishon regulating the level of the metals in their bodies during the uptake and elimination processes.