Effects of dietary quercetin on growth performance, serum biochemical indices, non-specific immune indices of Juvenile Tilapia (GIFT Oreochromis niloticus)
A 49-day growth trial was conducted to evaluate the effect of dietary quercetin on growth performance,serum biochemical indices,non-specific immune indices of Juvenile Talipia (GIFT Oreochromis niloticus).Two hundred and forty fish with initial average weight of (11.50±0.05) g were randomly divided into four treatment groups with three replicates in each treatment group and 20 fish in each replicate.The fish of four treatment groups were fed experimental diets supplemented with 0(control group),200,400,and 800 mg/kg quercetin on the basis of basal diet,respectively.The results showed as follows:compared with the control group,the weight gain rate,specific growth rate,protein efficiency ratio and condition factor of quercetin supplemental groups were significantly increased (P＜ 0.05) and feed conversion ratio of quercetin supplemental groups were significantly decreased (P＜ 0.05),while there were no significant differences between all quercetin supplemental groups(P＞ 0.05).No significant differences were found in feed rate,viscerosomatic index,hepatosomaticic index and survival rate between the control group and all quercetin supplemental groups.With the dietary quercetin levels increasing,the activities of blood urea nitrogen,alanine aminotransferase,aspartate aminotransferase in serum were significantly decreased.The serum total cholesterol and triglyceride levels were obviously decreased with the dietary quercetin levels increasing.All quercetin supplemental groups had significant higher activities of lysozyme and acid phosphatase compared with control group(P＜0.05).There were no significant differences on spleen index (P＞0.05) among all treatment groups,but with the increasing levels of quercetin,the spleen index was on the rise(P＜0.10).These results demonstrated that dietary quercetin could dramatically improve the growth performance,regulate the serum biochemical indices and enhance the non-specific immune indices of juvenile GIFT and 200 mg/kg quercetin was recommended in GIFT diets under this experimental condition.
quercetinGIFTgrowth performanceserum biochemical indicesnon-specific immune indices
NETL
NSTL
万方数据
维普
