Effects of dietary carbohydrate sources on growth performance, immunity and glycometabolic enzyme activity of Rhynchocypris lagowskii Dybowski
2021
Li, Min | Kong, Yi‐di | Li, Liang | Zhu, Rui | Wu, Li‐fang
We examined the effects of dietary carbohydrate sources on growth performance, digestive ability, immunity and glycometabolic enzyme activity of Rhynchocypris lagowskii Dybowski. The fish were fed with glucose, sucrose, dextrin and corn starch for 8 weeks. Final body weight, weight gain rate, specific growth rate, feed efficiency ratio and protein efficiency ratio were positively related to the complexity of carbohydrates in diet as were the levels of total antioxidant capacity, complement 3, protease, glutathione peroxidase, amylase, alkaline phosphatase, lysozyme, catalase, superoxide dismutase, fructose‐1,6‐bisphosphatase, hexokinase and pyruvate kinase. Malondialdehyde content, hepatic glycogen, glucose‐6‐phosphate dehydrogenase, hepatosomatic index, viscerosomatic index and crude lipid content were negatively related to the complexity of carbohydrates in diet. Therefore, Rhynchocypris lagowskii Dybowski fed with corn starch or dextrin showed positive effects in terms of growth, digestion and absorption, glycolysis, gluconeogenesis, antioxidant capacity and immunity than those fed with glucose or sucrose.
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