Ration Level for Salmonids II. Growth, Feed Intake, Protein Digestibility, Body Composition, and Feed Conversion in Rainbow Trout Weighing 0.5-1.0 kg
Ration Level for Salmonids II. Growth, Feed Intake, Protein Digestibility, Body Composition, and Feed Conversion in Rainbow Trout Weighing 0.5-1.0 kg
复制标题
鲑鱼的日粮水平 II。
DOI：
10.1016/0044-8486(87)90288-2
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发表时间：
1987
期刊：
影响因子：
4.5
通讯作者：
E. Austreng
中科院分区：
文献类型：
--
作者：
T. Storebakken;E. Austreng
12 组大西洋鲑鱼 (Salmo salarL.) 在玻璃纤维罐中饲养，按 12 个日粮水平进行 7 个周期的喂养，每个周期持续 28 天。基本日粮水平是根据预期的最大生长率计算的，具体取决于鱼的大小和水温。该级别被定义为“1.00级”。实验日粮水平从0.50到3.25变化，间隔为0.25。在开始饲养期间，平均存活率为95%。剩下的 6 个周期后，喂食最少的组的存活率为 48%。其他组的平均存活率为 81%。在所有 7 个时期中，将日粮水平从 0.50 提高到 1.00 都会导致生长加快。日粮水平的进一步增加并没有导致额外的增长。鱼种的体重分布是双峰的，喂食量最少的组中的大多数鱼都处于较低的模式。投喂充足组中的鱼大多数分布在上层。水温变化范围为10℃至17℃，热总和为2430日度。接受1.00至3.25日粮水平的鱼的平均最终重量为28.3克，而在研究结束时，日粮量最少的鱼仅重9.6克。两个喂食不足组的饲料转化率为 0.9-1.0 千克干饲料/千克生长，而其他组的饲料转化率为 1.0 至 3.0。鱼的化学成分根据鱼的大小和日粮水平而变化。
Twelve groups of Atlantic salmon (Salmo salarL.), raised in fibre-glass tanks, were fed at 12 ration levels for 7 periods, each period lasting 28 days. The basic ration level was calculated from an expected maximum growth rate, depending on fish size and water temperature. This level was defined as “level 1.00”. The experimental ration levels varied from 0.50 to 3.25 in intervals of 0.25.During the start-feeding period there was an average survival rate of 95%. After the remaining 6 periods the group which was fed least had a survival rate of 48%. The other groups had an average survival rate of 81%. In all 7 periods, increasing the ration levels from 0.50 to 1.00 resulted in increased growth. A further increase in ration level did not result in extra growth. The weight distribution of the fingerlings was bimodal, with the majority of fish in the scantiest fed groups being in the lower mode. The majority of the fish in the adequately fed groups were distributed in the upper mode.The water temperature varied from 10 to 17°C, and the thermal sum was 2430 day-degrees. The average final weight of the fish which received ration levels from 1.00 to 3.25 was 28.3 g, while the fish on the scantiest ration weighed only 9.6 g at the end of the study. The feed conversion rate, which was 0.9–1.0 kg dry feed/kg growth for the two underfed groups, ranged from 1.0 to 3.0 in the other groups. The chemical composition of the fish varied according to fish size and ration level.