Abstract

The aquatic ecosystem is faced with the threat of biodiversity loss due to indiscriminate use of pesticides. Other than targeted pests, pesticides affect a wide range of non target organisms, such as invertebrates and fish inhabiting aquatic environment. The present study deals with the impact of endosulfan on histopathology of stomach of Channa punctatus Bloch. In the laboratory condition fishes are divided into control and experimental groups. The LC50 value of endosulfan for Channa punctatus Bloch. is calculated which is 0.0004ppm. For the experiment two concentrations are selected 0.0002ppm and 0.0004ppm and fishes are exposed for 24hrs, 48hrs, 72hrs, 96hrs. Fishes showed severe histological changes in Stomach. The degenerative changes included fused microvilli, the outer membrane of microvilli are broken, hemorrhage in the sub mucosa region, cells swelling, vacuoles are recorded in an increasing order towards the higher tested doses. This type of work can be helpful in understanding hazards of pesticides and pollution of pesticide by anthropogenic activity.