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Abstract
The present study was designed to evaluate and compare between the ecotoxicological impacts of different water pollutants on male and female Nile catfish; Clarias gariepinus at Aswan (Reference site), Naga Hammadi, Hawamdiya and El Qanater. While water pH, Turbidity, TSS, Alkalinity, BOD, COD, NO₃, PO₄, SO4, K , Na , Mg, Al, Cd, Cu, Pb, and Zn all were higher at Hawamdiya and lower at Aswan ,DO and air temp., were higher at Aswan and lower at Hawamdiya . Water temp., EC, TDS, Cl, Ca and Co were higher at El Qanater than Aswan. Generally, all the studied heavy metals showed higher bioaccumulation in the studied vital organs (liver, kidney gills, air breathing organ, skeletal muscles, testis and ovary) at Hawamdiya and lower at Aswan. Blood Parameters (RBCs, Hb, PCV, WBCs and PLT) and calculated blood indices (MCV, MCH and MCHC) and serum glucose, Urea and creatinine showed higher values in female than males with significant differences at all the studied sites. Serum AST and ALT activities and T₃& T₄ hormones of both male and female Nile catfish were higher at Aswan and lower at El Qanater. Serum Progesterone and Testosterone hormones were higher in male Nile catfish than female. They were higher at Aswan and lower at El Qanater. Histopathological alternation were showed in liver, gills, air breathing organ, skeletal muscles, testis and ovary