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首页> 外文期刊>Aquaculture Reports >Effect of dietary protein levels on growth performance, hematological profile and biochemical composition of fingerlings rainbow trout, Oncorhynchus mykiss reared in Indian himalayan region
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Effect of dietary protein levels on growth performance, hematological profile and biochemical composition of fingerlings rainbow trout, Oncorhynchus mykiss reared in Indian himalayan region

机译：膳食蛋白质水平对手指彩虹鳟鱼生长性能，血液学曲线和生化组成的影响，在印度喜马拉雅地区养殖

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A 10-week feeding trial was undertaken to determine the optimum dietary protein requirement of fingerling rainbow trout, Oncorhynchus mykiss . Six casein-gelatin based isocaloric (20.90?kJ 100?gsup?1/sup, gross energy) diets containing graded levels of dietary protein (300–550?g?kgsup?1/sup crude protein) were formulated. Twenty fingerlings (1.56?±?0.22?g; 5.80?±?0.50?cm) were randomly stocked in triplicate groups in 75?L circular trough fitted with continuous flow-through system (water volume 2–2.5?Lsup?1/sup) and fed experimental diets at 5% BWdaysup?1/sup at 0800, 1200 and 1700?h. Significant ( P ??0.05) differences in live weight gain, specific growth rate (SGR), feed conversion ratio (FCR), protein efficiency ratio (PER) and body protein deposition (BPD) were noted. Quadratic regression analysis of SGR, FCR, PER and BPD data indicated requirements for dietary protein at 464.5, 471.0, 444.0 and 449.6?g?kgsup?1/sup of dry diet, respectively. Maximum protein, low moisture and intermediate body fat contents were recorded with fish fed at 450?kgsup?1/sup protein diet, while highest HSI value was observed at lowest protein level. Significant differences ( P ??0.05) were also observed in Hb, Hct and RBC values of fish fed varying protein diets. Based on the above results, it is recommended that rainbow trout fingerlings require protein in the range of 450–471?g?kgsup?1/sup for its optimum growth and efficient feed utilization.
机译：进行了10周的饲养试验，以确定鱼明虹鳟鱼的最佳膳食蛋白质要求，Oncorhynchus mykiss。六个酪蛋白 - 明胶基同种大核（20.90〜kJ 100？g α1，总能量）饮食含有饮食蛋白的分级水平（300-550Ω·g≤kg？1 配制粗蛋白质。二十个指数（1.56？±0.22？g; 5.80？±0.50？cm）在75℃的三份组中随机储量，在75℃的三份组中，配有连续流通系统（水体积2-2.5？L ？ 1 ）和喂养的实验饮食在5％Bwday 1 0800,1200和1700？h。注意到活体重增加，特异性生长速率（SGR），饲料转化比（FCR），蛋白质效率比（每）和体蛋白沉积（BPD）的显着（P？0.05）。 SGR，FCR，每次和BPD数据的二次回归分析表明膳食蛋白的要求分别在464.5,471.0,444.0和449.6？g？kg β1/ sup>的干燥饮食中的要求。用在450Ωkg 蛋白饮食中饲喂的鱼记录最大蛋白质，低水分和中间体脂肪含量，而在最低蛋白质水平下观察到最高的HSI值。在HB，HCT和FER的RBC值中也观察到显着差异（P？<β05），喂养各种蛋白质饮食的鱼类。基于上述结果，建议彩虹鳟鱼类需要蛋白质在450-471Ω·克·kg Δ1/ sup>的最佳生长和有效的饲料利用范围内。

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