5279
Sahr Badrawy Abdel Aziz
Effect of some herbal extracts on the health status of cultured Oreochromis niloticus
Tilapia, growth, immunity, Areomonis hydrophila , herbal extracts.
The present study was conducted to determine the effect of (green onion leaves-barley seeds-rice straw) extracts on growth, some physiological parameters and immunity of tilapia fish. The experiment was carried in 21 glass tank for 60 days. Seven experimental diet were formulated at 25% crude protein representing the following levels {control (0), OE (0.5) OE (1), BE (0.5), BE (1), RE (0.5) and RE (1) g/kg diet} .210 fish (wt. 30±5g) were fed twice daily 3% of body weight. At the end of experiment there was significant increase (P < 0.05) in weight gain in groups fed OE and BE extracts (0.5-1g)/kg diet. After 8 weeks, serum lysozyme activity, phagocytosis showed significant increase in groups fed OE and BE extracts while there is no effect in fish fed RE extract. The analysis of AST, ALT, and ALP showed no significant changes in all treated groups. Globulin level increased in OE and BE groups. No changes in RBCS count and HB level were detected in all groups while there was significant increase in WBCS count in OE and BE groups. The blood glucose level showed significant decrease in OE groups than control one. The result of this study demonstrated that OE and BE could improve growth and fish immunity. (OE= Onion leaves extract, BE= Barley seed extract, RE= rice straw extract).
2017
M.Sc
Cairo
Veterinary Medicine