Toxic effects of profenofos on tissue acetylcholinesterase and gill morphology in a euryhaline fish, Oreochromis mossambicus.

Acute and sub-acute studies of profenofos [ O-(4-bromo-2-chlorophenyl)- O-ethyl- S-propyl phosphorothioate] on fish, Oreochromis (Tilapia) mossambicus, were carried out to assess the toxicity in relation to behaviour, morphology, and interactions with the targeted enzyme acetylcholinesterase (AChE, EC 3.1.1.