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首页> 外文期刊>Aquaculture Research >Optimum dietary protein and lipid levels for juvenile rockfish (Sebastes schlegeli, Hilgendorf 1880)
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Optimum dietary protein and lipid levels for juvenile rockfish (Sebastes schlegeli, Hilgendorf 1880)

机译：少年石鱼的最佳饮食蛋白质和脂质水平（Sebastes schlegeli，希尔根多夫1880）

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摘要

Optimum dietary protein and lipid levels for juvenile rockfish were determined. Eight hundred and ten juvenile fish averaging 3.22g were randomly chosen and distributed into 27 flow-through tanks of 50L (30 fish per tank). Nine experimental diets were prepared according to a 3x3 factorial experimental design: three crude protein levels (45%, 50% and 55%)xthree crude lipid levels (11%, 15% and 19%). Crude protein and crude lipid levels increased at the expense of dextrin and cellulose in the experimental diets. Survival of fish was not affected by either dietary protein or lipid level. Weight gain of fish was affected by dietary protein level, but not by dietary lipid level. Weight gain of fish fed the 50P-15L (50% protein and 15% lipid) diet was higher than that of fish fed the 45% protein diets regardless of lipid level, but not different from that of fish fed the 50P-11L (50% protein and 11% lipid), 50P-19L (50% protein and 19% lipid), 55P-11L (55% protein and 11% lipid), 55P-15L (55% protein and 15% lipid) and 55P-19L (55% protein and 19% lipid) diets. Feed consumption of fish was affected by dietary protein level, but not by dietary lipid levels. Feed efficiency ratio (FER) of fish was affected by dietary protein level, but not by dietary lipid level. Protein efficiency ratio (PER) of fish was affected by dietary protein level, but not by dietary lipid level. Nitrogen retention efficiency (NRE) of fish fed the 45P-19L diet was higher than that of fish fed the 45P-11L, 50P-11L, 50P-15L, 50P-19L, 55P-11L, 55P-15L and 55P-19L diets, but not different from that of fish fed the 45P-15L diet. Moisture, crude protein and crude lipid contents of fish was affected by dietary protein and/or lipid level. Plasma triglyceride of fish was affected by dietary lipid level, but not by dietary protein level. In conclusion, optimum protein and lipid levels for growth and feed utilization (PER and NRE) for juvenile rockfish were 50% and 15%, and 45% and 19%, respectively, and the optimum dietary protein-to-energy ratio of 27.4 and 23.9mg proteinkJ(-1).
机译：确定了幼鱼的最佳饮食蛋白质和脂质水平。随机选择平均平均3.22g的810条幼鱼，并将其分配到27个50L的流通池中（每池30条鱼）。根据3x3阶乘实验设计准备了9种实验饮食：三种粗蛋白水平（45％，50％和55％）x三种粗脂水平（11％，15％和19％）。在实验饮食中，粗蛋白和粗脂质水平的增加以糊精和纤维素为代价。鱼类的生存不受饮食蛋白质或脂质水平的影响。鱼的体重增加受饮食蛋白质水平的影响，但不受饮食脂质水平的影响。饲喂50P-15L（50％蛋白和15％脂质）日粮的鱼的体重增加高于饲喂45％蛋白日粮的鱼，无论其脂质水平如何，但与饲喂50P-11L（50％）的鱼的体重增加没有区别％蛋白质和11％脂质），50P-19L（50％蛋白质和19％脂质），55P-11L（55％蛋白质和11％脂质），55P-15L（55％蛋白质和15％脂质）和55P-19L （55％的蛋白质和19％的脂质）饮食。鱼的饲料消耗量受饮食蛋白质水平的影响，但不受饮食脂质水平的影响。鱼的饲料效率比（FER）受日粮蛋白质水平的影响，但不受日粮脂质水平的影响。鱼的蛋白质效率比（PER）受日粮蛋白质水平的影响，但不受日粮脂质水平的影响。饲喂45P-19L日粮的鱼的氮保留效率（NRE）高于饲喂45P-11L，50P-11L，50P-15L，50P-19L，55P-11L，55P-15L和55P-19L日粮的鱼，但与喂食45P-15L日粮的鱼没有区别。鱼的水分，粗蛋白和粗脂含量受日粮蛋白和/或脂质水平的影响。鱼的血浆甘油三酸酯受饮食脂质水平的影响，但不受饮食蛋白质水平的影响。总之，幼鱼的最佳生长和饲料利用率（PER和NRE）的蛋白质和脂质水平分别为50％和15％，45％和19％，最佳日粮蛋白质能量比为27.4和23.9mg蛋白kJ（-1）。

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