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首页> 外文期刊>North American Journal of Aquaculture >Effect of feeding frequency on growth, food conversion efficiency, and meal size of juvenile Atlantic sturgeon and shortnose sturgeon
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Effect of feeding frequency on growth, food conversion efficiency, and meal size of juvenile Atlantic sturgeon and shortnose sturgeon

机译：饲喂频率对大西洋大西洋st鱼和短鼻st鱼生长，食物转化效率和膳食大小的影响

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摘要

We examined the importance of feeding frequency on the growth, conversion efficiency, and meal size of juvenile Atlantic sturgeon Acipenser oxyrinchus and shortnose sturgeon A. brevirostrum. Trials by species were completed consecutively after the fish reached 8 months of age. For both trials, 12 tanks were each stocked with five fish. The feed ration was set at 3% of the tank biomass per day and was adjusted weekly according to increases in tank total biomass. Tanks were randomly chosen to be fed one, four, or eight times during each 24-h period. We found differences in specific growth rate (SGR), corrected food conversion efficiencies (CFCE), and meal size among species. Overall, Atlantic sturgeon grew better, ate more, and exhibited greater feeding efficiencies than shortnose sturgeon, regardless of feeding frequency. Atlantic sturgeon exhibited SGRs of 2.3%/d and conversion efficiencies of 100%. Shortnose sturgeon exhibited growth rates of 0.7-1.6%/d and conversion efficiencies of 42-93%. Only shortnose sturgeon fed four times per day (SGR, 1.6%/d; CFCE, 93%) exhibited results similar to those of Atlantic sturgeon. Atlantic sturgeon had similar growth and feeding efficiencies in all feeding frequency regimes. Shortnose sturgeon fed once per day had significantly lower growth rates (0.7%/d) and feeding efficiencies (42%) than those fed four and eight times per day.
机译：我们研究了饲喂频率对大西洋大西洋st鱼Acipenser oxyrinchus和短鼻stA。brevirostrum的生长，转化效率和粕粉大小的重要性。鱼达到8个月大后，按物种进行的试验已经连续完成。在这两个试验中，每个鱼缸都放养了12条鱼缸，其中有5条鱼。进料量设定为每天储罐生物量的3％，并根据储罐总生物量的增加每周调整一次。在每个24小时内随机选择给坦克喂食一次，四次或八次。我们发现物种之间的特定生长率（SGR），校正后的食物转化效率（CFCE）和膳食大小存在差异。总体而言，与短食st鱼相比，大西洋urge鱼的生长更好，进食更多，进食效率更高，而与喂食频率无关。大西洋st鱼的SGR为2.3％/ d，转换效率为100％。短鼻st的生长速度为0.7-1.6％/ d，转化效率为42-93％。每天只喂短毛st鱼四次（SGR，1.6％/ d; CFCE，93％），其结果与大西洋st鱼相似。大西洋feeding鱼在所有进食频率范围内都有相似的生长和进食效率。每天饲喂短鼻st的生长率（0.7％/ d）和饲喂效率（42％）明显低于每天饲喂四，八次的。

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