Effects of Inulin, Savory and Onion Powders in Diet of Juveniles Carp Cyprinus Carpio (Linnaeus 1758) on Gut Micro Flora, Immune Response and Blood Biochemical Parameters

In this experiment for evaluation the effect of inulin, savory (Satureja khuzestanica) and onion powder on common carp, a diet was formulated as a control (0) and four other diets to contain 1% inulin, 1% savory, 1% onion and 1% mixture of savory and onion powder (savory-onion). Fish with initial average weight of 20.0 +/- 0.08 g were allotted to 15 circular tanks of 300 L capacity at a density of 10 fish per each tank and fed to satiation the experimental diets three times a day. At the end of 45 feeding days, the lysozyme activity and complement C-3 and C-4 values of fish fed 1% inulin powder were significantly higher (P<0.05) than the control. The blood protein and globulin of fish fed 1% inulin, 1% savory and 1% savory-onion powder were significantly higher (P<0.05) whereas, the triglyceride values of fish fed 1% savory and 1% onion powder were significantly lower (P<0.05) than the control. The number of total lactic acid bacteria significantly increased (P<0.05) in all treatments compared to the control group. So, 1% dietary inulin can be used as an immune additive in diet of carp juvenile.