Abstract

The toxic effect of textile effluent on the digestive enzymes and histology of intestine of Cyprinus carpio was studied. The fish were exposed for 10, 20 and 30 days in 10% and 30% sublethal concentrations of 96 h LC50 of textile effluent. The amylase, protease and lipase activity was significantly decreased after chronic exposure to textile effluent. These changes occurred predominantly in the 30 days exposure. Several pathological changes were noticed in the intestinal tissues of textile effluent treated fish. In Cyprinus carpio treated with textile effluent for a period of 10 days, the changes observed in the intestine of fish were ruptured and shapeless villi, vacuolization, histolysis of columnar cells and loss of brush border. In 20 days treated, fish the lamina propria showed inflammation, necrosis and appeared to be fused with the epithelial layer. At the end of 30 days treatment, several necrotic lesions in the epithelial layer, disintegrated columnar epithelium and loss of brush border were obvious.

Keywords

Textile effluent, Fish, Digestive enzyme activity, Intestine histology.

Received on 04/09/2017, Accepted on 15/11/2016, Published on 07/04/2017