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首页> 外文期刊>The Progressive Fish-Culturist >GROWTH, SURVIVAL, AND BODY COMPOSITION OF LARGEMOUTH BASS FED VARIOUS COMMERCIAL DIETS AND PROTEIN CONCENTRATIONS
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GROWTH, SURVIVAL, AND BODY COMPOSITION OF LARGEMOUTH BASS FED VARIOUS COMMERCIAL DIETS AND PROTEIN CONCENTRATIONS

机译：大嘴鲈鱼各种商业饮食和蛋白质浓度的生长，存活率和身体组成

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摘要

Aquaculturists often intensively culture fish species before the nutrient requirements of the species are known. Largemouth bass Micropterus salmoides have been cultured on pelleted diets since the 1960s, but growth and survival of fish on these diets have not been evaluated. We examined growth rate, survival, and body composition of largemouth bass (initial total length, 110 mm) fed six commercial diets for 56 d. Largemouth bass fed diets for coolwater (W-16) and coldwater (Biodiet Grower) species grew faster than those fed diets formulated for bass (Black Magic Bass Food and Biosponge Bass Grower). Whole body protein, lipid, moisture, and ash were affected by the type of commercial diet. Lipid levels were higher for fish fed Biodiet Grower than for fish fed all other diets. Based on this evaluation, we recommend either W-16 or Biodiet Grower for rearing largemouth bass. Because protein is one of the most important components affecting performance of pelleted diets, we conducted a second set of experiments over a 51-d period to evaluate growth rate, survival, and body composition of largemouth bass (initial total length, 98 mm) fed four diets that ranged in protein concentration from 31 to 40%. Growth rate varied with protein level, and fish fed the two diets highest in protein grew faster than those fed the two diets lowest in protein. Lipid and moisture, but not protein and ash, were affected by diet type. Lipid content decreased and moisture content increased as dietary protein increased. Specific growth rate was greatest at a protein level of 37%, which was judged to be the optimum dietary level for these sizes of largemouth bass when the dietary energy level is 3.27 kcal/g.
机译：水产养殖者通常在知道鱼类的营养要求之前就进行密集养殖。自1960年代以来，大口黑鲈微片鲑已经在粒状日粮中进行养殖，但是未评估这些日粮中鱼的生长和存活。我们研究了喂食六种商业饮食56天的大嘴鲈鱼（初始总长110毫米）的生长速率，存活率和身体组成。大口黑鲈以冷水（W-16）和冷水（Biodiet种植者）为食的饲料的生长速度快于黑鲈（Black Magic Bass Food和Biosponge Bass Grower）。全身蛋白质，脂质，水分和灰分受商业饮食类型的影响。饲喂Biodiet Grower的鱼的脂质水平高于饲喂所有其他饮食的鱼。基于此评估，我们建议使用W-16或Biodiet Grower饲养大口黑鲈。因为蛋白质是影响颗粒饲料性能的最重要组成部分之一，所以我们在51天的时间内进行了第二组实验，以评估饲喂大口黑鲈（初始总长度为98毫米）的生长速率，存活率和身体成分四种饮食的蛋白质浓度范围从31％到40％。生长速度随蛋白质水平的变化而变化，饲喂两种蛋白质含量最高的饮食的鱼的生长速度快于饲喂两种蛋白质含量最低的饮食的鱼。饮食类型会影响脂质和水分，而不会影响蛋白质和灰分。随着饮食蛋白质的增加，脂质含量降低，水分含量增加。当蛋白质的能量水平为3.27 kcal / g时，蛋白质含量为37％时，特定生长率最大，这被认为是这些大口黑鲈大小的最佳饮食水平。

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