investigating the effects of hydroalcoholic extracts of barberry (berberis vulgaris l.) and sumac (rhus coriria l.) on the activity of antioxidant enzymes in the liver of rainbow trout (oncorhynchus mykiss)

There have been several studies on the use of medicinal plants to improve growth parameters, increase resistance to stress conditions and improve the immune system and increase the activity of digestive enzymes and antioxidants which have recommended the use of medicinal plants. this research was conducted with the aim of investigating the hydroalcoholic extracts of barberry and sumac on the activity of antioxidant enzymes in the liver of rainbow trout for a period of eight weeks. 360 pieces of rainbow trout with an average weight of 20±5 g were obtained from one of the rainbow trout breeding centers. fish were randomly divided into six treatments including 100 and 200 mg of barberry extract per kg of food, 100 and 200 mg of sumac extract per kg of food, 100 mg of barberry extract and 100 mg of sumac extract as groups. the fifth and the control group were divided into subgroups. the results of investigating the activity of antioxidant enzymes showed that the antioxidant enzymes of the fish of different treatments were affected by the diets, therefore, there was a significant difference in the activity of antioxidant enzymes. oxidation was observed in 100 and 200 mg sumac treatments and 200 mg barberry treatments. in total, the results of this research showed that the use of hydroalcoholic extract of sumac plant significantly improved the immune system of rainbow trout in commercial farming conditions.