| Popis: |
Herbicides have, no doubt, increased crop yields by killing different types of weeds, however, rainfall and irrigation can wash herbicides from sites of application into the water system. Fish has an important role in the food chain; therefore, investigation of the effects of Round-up on fish has a diag-nostic significance in evaluation of adverse effect of herbicides to human health. The sub-lethal effects of Round-up herbicide on juveniles of an Afri-can catfish Clarias gariepinus was investigated under laboratory conditions. The herbicide caused mortality of fish in a concentration dependent manner for the duration of exposure to acute concentrations (LC5O) of the herbicides for 96hrs.The lethal concentration (LC5O) value of glyphosate was gotten to be 0.560mg/1 for 96hr of exposure using Probit analysis. For the sub-lethal assay, standard haematological procedures were adopted to evaluate the blood parameters. There was significant reduction (p |
