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首页> 外文期刊>The Progressive Fish-Culturist >GROWTH AND FEED UTILIZATION OF HATCHERY-REARED JUVENILE NASSAU GROUPER FED FOUR PRACTICAL DIETS
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GROWTH AND FEED UTILIZATION OF HATCHERY-REARED JUVENILE NASSAU GROUPER FED FOUR PRACTICAL DIETS

机译：孵化的鱼幼崽NASSAU石斑鱼进食四份实用饲料的生长和饲料利用

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摘要

The effects of four practical diets, formulated for carnivorous marine finfish, on growth, feed utilization, and body composition of hatchery-reared juvenile Nassau grouper Epinephelus striatus (mean weight +/- SD = 2.37 +/- 0.75 g) were compared for 56 d in 145-L, flow-through seawater (36-38 parts per thousand) aquaria. Diets differed in crude protein (CP) and crude lipid (CL) content as follows: low CP (43.5%), low CL (5.91%) trout grower (LP-LL); midlevel CP (52.7%), high CL (15.2%) salmon grower (MP-HL); midlevel CP (55.6%), low CL (7.79%) Japanese formulation for carnivorous fish (MP-LL); and a high CP (61.8%), high CL (14.2%) research diet for dolphin (mahimahi) Coryphaena hippurus (HP-HL). Energy : protein ratios (E:P) of these diets were 35.2, 32.0, 28.3 and 28.9 kJ/g, respectively. Relative growth rate (RGR, % increase in weight) and specific growth rate (SGR, % increase in body weight/day) were strongly correlated (P < 0.0005) to dietary CP and E:P ratio and were higher (P < 0.05) for fish fed the MP-LL and HP-HL diets (RGR = 454-502%; SGR = 3.05-3.19%/d) than in the LP-LL and MP-HL diets (RGR = 68.6-160%; SGR = 0.93-1.71%). Feed utilization, including conversion ratio (FCR), protein efficiency ratio (PER), apparent net protein retention (ANPR), and apparent net energy retention (ANER) were also highly correlated (P < 0.0005) to dietary CP and E:P ratio. These parameters were significantly (P < 0.05) higher in the MP-LL diet than in the other diets. No clear relationships between dietary nutrient levels and proximate body composition were observed. Results indicated that cultured juvenile Nassau grouper require a dietary protein level above 55% and an E:P ratio below 28.9 kJ/g for optimum growth.
机译：比较了四种用于肉食性有鳍鱼类的实用饮食对孵化场饲养的拿骚石斑鱼斑马鱼（Epinephelus striatus）（平均体重+/- SD = 2.37 +/- 0.75 g）的生长，饲料利用和身体成分的影响，共56种d在145-L流通海水（千分之36-38）的水族馆中。日粮在粗蛋白（CP）和粗脂质（CL）含量方面的差异如下：低CP（43.5％），低CL（5.91％）鳟鱼种植者（LP-LL）;中级CP（52.7％），高CL（15.2％）鲑鱼种植者（MP-HL）;中型CP（55.6％），低CL（7.79％）日本食肉鱼配方（MP-LL）;以及海豚（mahimahi）海豚（HP-HL）的高CP（61.8％），高CL（14.2％）研究饮食。这些饮食的能量：蛋白质比率（E：P）分别为35.2、32.0、28.3和28.9 kJ / g。相对生长率（RGR，体重增加百分比）和比生长率（SGR，体重/天增加百分比）与饮食中CP和E：P的比例密切相关（P <0.0005），且较高（P <0.05） MP-LL和HP-HL日粮（RGR = 454-502％; SGR = 3.05-3.19％/ d）饲喂的鱼比LP-LL和MP-HL日粮（RGR = 68.6-160％; SGR = 0.93-1.71％）。饲料利用率，包括转化率（FCR），蛋白质效率比（PER），表观净蛋白保留量（ANPR）和表观净能量保留量（ANER）也与饲料中CP和E：P比率高度相关（P <0.0005） 。与其他饮食相比，MP-LL饮食中的这些参数显着更高（P <0.05）。没有观察到饮食营养水平和身体附近成分之间的明确关系。结果表明，培养的拿骚石斑鱼需要膳食蛋白含量高于55％，E：P比值低于28.9 kJ / g，才能达到最佳生长。

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