Using of freshwater Catfish Clarias gariepinus as an Indicator of Invironmental Heavy Metals Contaminationin Egyptian Water Resources

This study four surveys (January, April, July and October, 2008) were undertaken to investigate the bioaccumulation of Cd, Pb and Ni in the liver, kidney, gills, skin and muscles of both sexes of Clarias gariepinus from the River Nile south (Al-Aiat) and skin of both sexes; in the muscles of male fish and in the liver and kidney of female ones. Large numbers of significant difference values were detected in the serum biochemical parameters studied:- Location effect appeared more evident with serum ALP andsignificant sex change. Serum g-GT did not show any significant seasonal change in this study. The multiple linear regression analysis between thethree heavy metals accumulations in the five organs and the serum biochemical values revealed that the variatfollows: 6 – 9 %; 23 %; 6 – 11 %; 53 %; 29 % and 30 % for the serum
- GT; uric acid; creatinine; T3; T4 and T3/T4 ratio respectively.