Hexavalent chromium: Toxicity and its impact on certain aspects of carbohydrate metabolism of the freshwater teleost, Colisa fasciatus

Abstract

The effect of hexavalent chromium on the static bioassay was examined. The LC 0, LC 50 and LC 100 values at 24, 48, 72 and 96 h were determined. At 96 h, the LC 50 value was found to be 60 mg l −1 or 6.000 × 10 −4 moll −1. The impact of a sublethal concentration of 48 ppm on the liver glycogen and blood glucose levels was investigated during 3–96 h. Liver glycogen exhibited significant depletion with all exposure periods except 3 h. Blood glucose level increased significantly from 6 h onwards, attaining its peak value at 72 h.