blood biochemical and liver histopathological changes in rainbow trout (oncorhynchus mykiss) following exposure to sub-lethal concentrations of diazinon

pesticides are one of the most pollutants in aquatic ecosystems. monitoring of aquatic pollution with these compounds is very important. therefore, health status of aquatic animals can be used as a bio-indicator for pollution monitoring in surface waters. diazinon is an organophosphorous pesticide, which is found in the aquatic environment of iran. the concern has arisen over the ability of this compound to affect the health of fish in recent years. in this study, the effects of exposure to sub-lethal concentrations of diazinon on some biochemical parameters of rainbow trout, oncorhynchus mykiss were examined after 7, 14 and 28 days. acetylcholinesterase (aceh) activity and the levels of total protein, albumin as well as globulin in plasma were significantly reduced at 0.1 and 0.2 mg/l concentrations tested (p