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首页> 外文期刊>Archivos Latinoamericanos de Produccion Animal >Productive performance of rainbow trout in cages underdifferent feeding strategies
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Productive performance of rainbow trout in cages underdifferent feeding strategies

机译：不同饲养策略下网箱中虹鳟的生产性能

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Slight improvements in the feeding efficiency can be translated in an important diminution of the production costs and feed wastes that would alter the water quality. With the objective of determine the optimal daily ration during the season of greater growth and study the effect of ration on the corporal condition (K) of rainbow trout under the conditions of a commercial operation, the growth of 15 000 juveniles under 3 treatments was evaluated: feeding to satiety (J1), growth ration (J2) and maintenance ration (J3). The total length, corporal weight and K differed significantly with the applied treatment, resulting in all cases J1>J2>J3. At the final of trial, J1 group has shown the higher body weight (153.9 ± 4.12 g) with respect to J2 (110.5 ± 2.74 g) and J3 (75.1 ± 1.94 g). An oscillating feeding behavior, with variations from 1 to 3% of a day for another one, has been observed in J1. The relation between the specific growth rate (SGR) and the daily ration (R) fit to a quadratic function, SGR=(-0.22.R2)+(2.57.R)-3.12. On the other hand, the relation between the feed conversion ratio FCA and the SGR fit to the function FCA=2.02.SGR-0.53. Optimal values to FCA have been observed when fed at 50% of satiety or more. No significant differences were observed for global FCA between J1 (1.32 ± 0.08) and J2 (1.13. ± 0.14). Consequently, satiety feeding would be the best option during the summer when the temperature is optimal for the growth.
机译：饲喂效率的略微提高可以转化为生产成本和饲料浪费的显着减少，这将改变水质。为了确定生长旺盛季节的最佳日粮，并研究日粮在商业化经营条件下对虹鳟体质（K）的影响，评估了3种处理下15,000只幼鱼的生长：饱食（J1），生长率（J2）和维持率（J3）。所施加的治疗方法的总长度，体质量和K差异显着，导致在所有情况下J1> J2> J3。在试验的最后阶段，相对于J2（110.5±2.74 g）和J3（75.1±1.94 g），J1组的体重更高（153.9±4.12 g）。在J1中，观察到另一天每天有1至3％的波动进食行为。比增长率（SGR）与日粮（R）之间的关系符合二次函数SGR =（-0.22.R2）+（2.57.R）-3.12。另一方面，进料转化率FCA和SGR之间的关系符合函数FCA ＝ 2.02.SGR-0.53。当饱腹感达到50％或更高时，观察到FCA的最佳值。在J1（1.32±0.08）和J2（1.13。±0.14）之间，未观察到全局FCA的显着差异。因此，在夏季最适合生长的温度期间，饱腹喂养将是最佳选择。

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