Effect of fruit aqueous extracts from cornelian cherry (Cornus mas L.) on some of growth parameters, hematological and non-specific immune indices of rainbow trout (Oncorhynchus mykiss) Juvenile

The purpose of this study was to evaluate the effect of different level offruitaqueous extracts from cornelian cherry (Cornus mas) on growth, hematological and immunity parameters of rainbow trout (Oncorhynchus mykiss). After 1 weeks for adaptation to the new condition, 96 O. mykiss juvenilewith 40±2.73g average weight randomly distributed in to 12 aquarium tanks with the capacity of 180 L with four treatments and three replicates. Each treatment feed with fruit aqueous extracts from C. mas by 0 (control group), 25, 50 and 100 mg/kg for 8 weeks. At the end of the feeding period, blood samples were taken from caudal vein of fish fries. Most of the growth parameters by significant difference from the control group was observed in 100 mg/kg fruit extracts from C. mas (p < 0.05). Most of the RBC, WBC, HCT, Lym, Tp, Cor, Ig, GST, GR, CAT, SOD and GPX was recorded in 100 mg/kg C. mas extracts (p < 0.05). However, the lowest value of MCV, MCH, Glu and MDA activity recorded in 100 mg/kg C. mas extracts (p < 0.05). In conclusion, it seems that fruit extracts from cornus mas for the reason that high level of total phenol, flavonoids and anthocyanins compounds has high antioxidant properties as well as inhibitory activity of free radicals. These properties can enhance the immune system of rainbow trout. Based on the results of these study the use of 100 mg/kg fruit aqueous extracts from Cornus mas extracts had the best results and can be recommended.