Effect of Chronic Dietary Copper Exposure on Haematology and Histology of Common Carp (<i>Cyprinus carpio L.</i>)

Abstract

Effects of exposure of common carp (Cyprinus carpio L.) to dietary copper and its recovery rate were investigated with the aim of determining the haematological and histological impact. In this study, fish were fed elevated copper diets (1000mgCukg-1 and 2000 mgCukg-1 as diet 2 and diet 3 respectively,) and control diet (5mgCukg-1, diet 1) for 42days and were then fed the control diet for a further 21days.To make dietary preparations of the copper concentrations,1.1722g and 2.3503g of CuSO4.5H2 O(AnalaR grade), dissolved in 35ml deionised water, were mixed with each of 300g of the commercially available pellet diet, which contained 5mgCu/kg of feeds, to make 1000mgCu/kg and 2000mgCu/kg of feed , respectively. Fish fed diet 2 (1000 mgCukg-1) showed significant increase (p