164RESIDUE ANALYSIS OF ENDOSULFAN IN FISH TISSUES BY GAS CHROMATOGRAPHYThe present study was undertaken to evaluate the effect of Endosulfan an organochlorine in freshwater fish Labeo rohita. Fish were exposed to lethal concentrations for 24hrs, the LC50 values for endosulfan and at 24hrs was 0.6876µgL-1 respectively. The 1/10th of 24 h LC50 was selected as sublethal concentrations. The present study was undertaken to determine the bio-accumulation of endosulfan in tissues of Labeo rohita exposed to sub-lethal concentrations 0.06876 µgL-1 for 15 days.suneetha_karyamsetty@yahoo.co.inResearch362012Labeorohita,Endosulfan, Gas chromatographyK. SuneethaDepartment of Biochemistry, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India