Growth and food utilisation of rainbow trout (Oncorhynchus mykiss) fed low-fat herring and dry diets enriched with fish oil
Growth and food utilisation of rainbow trout (Oncorhynchus mykiss) fed low-fat herring and dry diets enriched with fish oil
复制标题
饲喂低脂鲱鱼和富含鱼油的干饲料的虹鳟鱼（Oncorhynchus mykiss）的生长和食物利用
DOI：
10.1016/s0044-8486(98)00234-8
复制
发表时间：
1998
期刊：
影响因子：
4.5
通讯作者：
D. Grove
中科院分区：
文献类型：
--
作者：
K. Ruohonen;J. Vielma;D. Grove
2岁的虹鳟鱼（初始重量695克）喂养了15周的低脂波罗的海鲱鱼饮食，无论有或没有脂质富集。为了进行比较，类似的鳟鱼组喂食干颗粒与和不与鱼油追肥。包括脂质以类似的方式增加两种类型的饮食的增长率。对于鲱鱼为基础的饮食，增加脂质导致干物质消耗量增加，但对于干饲料，饲料效率（干重增长每干重食物消耗）提高了更多的营养物质的脂质沉积。如果在规定的脂质水平内进行比较，喂食鲱鱼饲料的鱼的生长速度比喂食干饲料的鱼慢。这可能是因为高的饮食水分含量，也是由于在冷冻储存过程中鲱鱼蛋白质质量的变化，因为蛋白质的保留效率较低的鲱鱼饮食。
Two-year-old rainbow trout (initial weight 695 g) were fed for 15 weeks low-fat Baltic herring diets either with or without lipid enrichment. For comparison, similar groups of trout were fed dry pellets with and without top-dressing with fish oil. Inclusion of lipid increased growth rate in a similar manner for both types of diets. For the herring-based diet, increased lipid resulted in increased dry matter consumption but for the dry diet, feed efficiency (dry weight growth per dry weight food consumption) was improved by channelling more nutrients to lipid deposition. If compared within a stated lipid level, fish fed the herring-based diets grew at a slower rate than fish fed the dry diets. This could have been because of high dietary water content and also due to changes in herring protein quality during the frozen storage since the protein retention efficiencies were lower for the herring diets.