AN ASSESSMENT OF THE TOXICITY LEVELS OF BHC ON 4 AQUATIC ORGANISMS

Acute toxicity of BHC to four aquatic organisms namely, fish (Etroplus maculatus) (Bloch), prawn (Macrobrachium idella idella) (Hilgendorf), clam (Villorita cyprinoides var Cochinesis (Hanley) and crab (Paratel phusa hydrodromus) (Herbst) were determined by conducting short term, static bio-assays. The organisms were exposed to different concentrati ons of BHC (HCH-technical solution) and LC(50) values were determined for each organism. Ninety Six hour LC(50) values for fish, prawn, clam and crab were 0.7, 0.0125, 13 and 5.8 ppm respectively.