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哲罗鱼稚鱼最佳投喂策略

郭文学,尹家胜**,张永泉,佟广香,白庆利   

  1. (中国水产科学研究院黑龙江水产研究所, 哈尔滨 150070)
  • 出版日期:2013-11-18 发布日期:2013-11-18

Optimal feeding strategy for juvenile Hucho taimen.

GUO Wen-xue, YIN Jia-sheng, ZHANG Yong-quan, TONG Guang-xiang, BAI Qing-li   

  1. (Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China)
  • Online:2013-11-18 Published:2013-11-18

摘要:

为探讨哲罗鱼稚鱼的最佳投喂策略,设置了饥饿再投喂试验、饥饿再投喂恢复试验以及日投喂频率试验.结果表明: 饥饿再投喂试验中,各饥饿组未表现出补偿生长现象.但在饥饿再投喂恢复试验中,各饥饿组表现出不同程度的补偿生长,其中S1/2组(饥饿1/2 d投喂1/2 d)体质量的增加量与对照组接近,表现出完全补偿生长.表明在哲罗鱼早期稚鱼阶段(体质量0~2 g,水温9~15.3 ℃),S1/2是可以考虑使用的投喂方法.日投喂频率试验中,T3组(日投喂3次)体长、体质量的增加量以及特定生长率均最高,饵料转化率也相对较高.表明在哲罗鱼后期稚鱼阶段(体质量2~21 g,水温8.8~15.5 ℃),以日投喂3次为宜.
 

Abstract: Three experiments including starvation and re-feeding, starvation and re-feeding recovery, and feeding frequency per day were conducted to approach the optimal feeding strategy for the growth and survival of juvenile Hucho taimen. In the experiment of starvation and re-feeding, all groups of restricted feeding showed non-compensatory growth. However, in the experiment of starvation and re-feeding recovery, different degrees of compensatory growth appeared in different starving groups, among which, the half a day starvation and half a day feeding group (S1/2) had a weight increment approximately the same as the control, and showed completely compensatory growth, indicating that the S1/2 could be a useful feeding strategy for the juvenile H. taimen at its early growth stage with the body mass from 0 to 2 g and at the water temperature from 9 to 15.3 ℃. In feeding frequency experiment, the group T3 (three meals per day) had the highest body length, body mass, specific growth rate, and relatively high food conversion ratio, indicating that three meals a day could be more effective for improving the growth performance of juvenile H. taimen at its late stage with the body mass from 2 to 21 g and at the water temperature from 8.8 to 15.5 ℃.