This study was conducted to investigate the potentials of dietary fructooligosaccharide (FOS) on growth and health of tilapia. Fish (5.00 ± 0.02 g) were fed five diets with FOS supplementation at 0 (CON), 0.5 (F‐1), 1 (F‐2), 2 (F‐3) and 4 (F‐4) g/kg feed for 8 weeks. The results showed that the weight gain and feed conversion ratio were improved by F‐2, F‐3 and F‐4 groups (p < .05). Dietary FOS promoted the retentions of protein and lipid (p < .05), and the digestibility of dry matter and protein was encouraged by F‐2 and F‐3 groups (p < .05). The FOS supplementation (except F‐4 group) increased serum alkaline phosphate and acid phosphatase activities and hepatic superoxide dismutase activity (p < .05). The amylase activity and villus height in anterior intestine were enhanced by all FOS groups (p < .05). The numbers of total bacteria in F‐3 and F‐4 groups, lactic acid bacteria in F‐4 group and Bacillus in all FOS groups were increased (p < .05). After challenged with Aermonas hydrophila, the cumulative mortality was decreased by all levels of FOS supplementation (p < .05). In conclusion, the FOS supplementation at least 1 g/kg feed could promote growth, nutrient utilization, immune and antioxidant parameters, digestive enzyme activity, gut health and disease resistance of tilapia.

中文翻译：

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低聚果糖对罗非鱼的生长，饲料利用率，免疫和抗氧化参数，微生物群落和抗病性的潜力（尼罗罗非鱼×金黄色葡萄球菌）

进行这项研究以调查饮食中低聚果糖（FOS）对罗非鱼生长和健康的潜力。鱼（5.00±0.02 g）分别以0（CON），0.5（F-1），1（F-2），2（F-3）和4（F-4）g / kg喂食五种添加FOS的饲料喂养8周。结果表明，F-2，F-3和F-4组提高了增重和饲料转化率（p <  .05）。饮食中的FOS促进了蛋白质和脂质的保留（p <  .05），F-2和F-3组促进了干物质和蛋白质的消化率（p <  .05）。FOS补充剂（F-4组除外）可增加血清碱性磷酸酶和酸性磷酸酶活性以及肝超氧化物歧化酶活性（p < .05）。所有FOS组均增强了前肠中的淀粉酶活性和绒毛高度（p <  .05）。F-3组和F-4组的细菌总数，F-4组的乳酸菌和所有FOS组的芽孢杆菌均增加（p <  .05）。用嗜水气单胞菌攻击后，所有水平的FOS补充均降低了累积死亡率（p <  .05）。总之，添加至少1 g / kg的FOS饲料可以促进罗非鱼的生长，营养物质利用，免疫和抗氧化参数，消化酶活性，肠道健康和抗病性。