美国红鱼继饥饿后的补偿生长及其机制
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大连水产学院养殖系

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辽宁省教育厅资助项目


The compensatory growth and its mechanismin of red drum, Sciaenops ocellatus, after food deprivation
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Department of Aquaculture, Dalian Fisheries College, Dalian 116023,China

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    摘要:

    对两种不同规格(8.25±0.50g,40.41±2.45g)的美国红鱼分别在18~20℃和20~24℃条件下进行了不同饥饿时间处理后再恢复投喂实验.在实验的30d内,两次实验结果均表现为饥饿5d组的美国红鱼生长略快于对照组,而饥饿10d和15d的鱼在相同的时间内,体重的增加量未能赶上对照组.各组间生长虽有差别,但都未达到显著水平.饥饿使鱼体水分、灰分含量增加,脂肪含量下降,蛋白质含量变化不大,但各成分从恢复投喂到实验结束时又恢复到对照组水平.各组间摄食量随饥饿时间延长而逐步下降,而饵料转换效率逐步上升.随着饥饿时间的延长,标准代谢率下降,而在恢复投喂之后又逐步回升至对照组水平.结果表明,美国红鱼的补偿生长效应主要是由降低标准代谢和提高食物转化率实现的.

    Abstract:

    Two studies were conducted to reveal the ability of compensatory growth after food deprivation and refeeding in two sizes of red drum , Sciaenops ocellatus , weighing 8. 25 ±0.50 g and 40.41 ±2.45 g in temperature of 18 -20 ℃and 20-24 ℃respectively. Within the 30 days of experiment , both of the two results showed that each group had difference in growth, but the difference was not significant. Compared with control group , the water content and ash increased , while the lipid decreased and the protein did not significantly change in starved groups. After the starved fish were refed, their biochemical composition could reach the level of control group. As the starvation prolongs, feeding quantity reduced,but feed conversion efficiency increased. Meanwhile the oxygen consumption rate decreased and this trend stopped when the fish were refed , then the oxygen consumption rate gradually increased to the level of the control group. The results suggest that the mechanism of compensatory growth in red drum be due to the low oxygen consumption rate and high digestion and absorption after starvation.

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姜志强.美国红鱼继饥饿后的补偿生长及其机制[J].水产学报,2002,26(1):

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  • 收稿日期:2014-04-12
  • 最后修改日期:2014-04-12
  • 录用日期:2014-04-12
  • 在线发布日期: 2014-04-12
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