*Fisheries Research Center, Assam Agricultural University, Jorhat-785013, India
Pesticide Residue Laboratory Department of Entomology, Faculty of Agriculture, Fisheries Research Center, Assam Agricultural University, Jorhat-785013, India
*Email: sankardeka@aau.ac.in
Online published on 15 October, 2011.
As a part of the pesticide-monitoring programme, fish samples both small and large (includes both exotic and native) collected from different locations, within the jurisdiction of Jorhat district, Assam from 1991–1996 and again during 2002–03 were analyzed for organochlorine (OC) pesticides viz., HCHs, DDTs and endosulfan. Endosulfan metabolites were only detected at very low quantity whereas, DDT metabolites and HCHs were either absent or found below detectable limit during 1991–93 and 1994–96. Monitoring studies during 2002–03, revealed the presence of HCHs at very low quantity and endosulfan and DDT metabolites were either absent or found below detectable limit. Accumulation of pesticide residues in fish followed the temperature dependent amplification mechanism. The concentrations of contaminants found were considerably lower than the maximum levels permissible in fish set by Codex. Fish samples collected from different locations of Jorhat district were having no toxicological significance and were safe for human consumption.
Organochlorine pesticides, fish, Jorhat (Assam)
