The effects of high-macronutrient (protein, fat and carbohydrate) diets on growth performance and muscular metabolic responses in grass carp

文献类型： 外文期刊

第一作者： Tian, Juan

作者： Tian, Juan;Wu, Fan;Yu, Lijuan;Lu, Xing;Jiang, Ming;Liu, Wei;Wen, Hua;Leng, Xiangjun

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关键词： fish; high-carbohydrate; high-fat; high-protein; metabolic responses

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）

ISSN： 1353-5773

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收录情况： SCI

摘要： Four purified diets were fed to quadruplicate groups of grass carp (Ctenopharyngodon idella) (initial body weight 55 g; 20 fish per replicate) for 11 weeks. The gross energy of three high-macronutrient diets was 11% higher than that of the control diet. The high-protein diet led to the highest weight gain (WG) and specific growth rate (SGR), while the lowest protein efficiency ratio (PER) and protein retention efficiency (PRE) (p < .05). No significant effect on the above four indexes was observed in fish fed the high-fat diet (p > .05). Fish fed high-carbohydrate diet had the lowest WG and SGR (p < .05), while no significant difference was found in PER and PRE (p > .05). The contents of crude fat, total polyunsaturated fatty acids in muscle in high-fat and high-carbohydrate groups, but not in high-protein group, were significantly higher than those of control group (p < .05). The contents of muscular protein and most amino acids did not show any clear change in response to high-macronutrient diet (p > .05). Gene expression data in muscle indicated thatg6pd,fasandacc1in muscle were up-regulated in high-fat and high-carbohydrate groups, andfbpandpckwere significantly up-regulated in high-macronutrient groups (p < .05). In conclusion, the high-fat and high-carbohydrate diets increased muscular fat deposition by up-regulation the key enzymes expressions of pentose phosphate pathway and fat synthesis, and high-macronutrient diets increased muscular glycogen content by up-regulation gluconeogenesis enzymes expressions.

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