Effects of Different Concentrations of Copper Alone and a Copper + Cadmium Mixture on the Accumulation of Copper in the Gill, Liver, Kidney and Muscle Tissues of Oreochromis niloticus (L.)


Abstract: Experiments were conducted in two series for 1, 7, 15 and 30 days. In the first series, fish were exposed to 0.1, 0.5, 1.0 and 5.0 ppm of copper and in the second series to 0.1 + 0.05, 0.5 + 0.1, 1.0 + 0.5 and 5.0 + 1.0 ppm of copper and cadmium mixtures. No mortalities were observed during the experimental period. Accumulation of copper in the tissues and organs increased with increasing concentrations of copper and with longer exposure periods. Copper accumulation associated with copper + cadmium mixtures in the gill, liver, kidney and muscle tissues varied with the concentration, exposure period and tissue type.

Keywords: Copper, cadmium, interaction, accumulation, fish, Oreochromis niloticus

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