Bioaccumulation of Zinc in Kidney Tissue of Common Carp (Cyprinus carpio L. 1758)

Abstract

The objective of the present study was to determine the bioaccumulation of zinc in kidney tissue of Cyprinus carpio exposed to 0.5 ppm concentration of this metal for 1, 15 and 30 days. Tissue accumulation of zinc was measured using Atomic Absorption Spectrophotometric techniques.

No mortality was observed during the 30 days of exposure. Zinc accumulation in kidney tissue of metal exposed fish increased with increasing exposure periods. Although this increase was not significant on the first day exposure (P>0.05), there were a 2.25 and 2.50 fold increases on days 15 and 30 respectively (P<0.05).

The results of the present study showed that zinc accumulation in kidney tissue of C. carpio increased significantly at prolonged periods even when exposed to a low concentration (0.5 ppm) of this metal.