IMPACT OF HAZARDOUS EXPOSURE TO METALS IN THE NILE AND DELTA LAKES ON THE CATFISH, CLARIAS LAZERA

摘要

The impact of metal pollution in the Nile and Delta lakes was sudied in Clarias lazera. Lake Edku is grouped as the site highest in metal concentrations. Compared to Lakes Maryut and Edku, the Nile stations displayed lower levels of metal contamination signifying their slection as reference site. Metals were accumulated most by the liver, less by muscles and least by serum. Iron showed the highest bioconcentration factors (BCF) in liver, muscles or serum compared to otehr metlas. Even after the refinement of he surrounding water, fish seem to uphold the metals that have been previously ingested.