中文摘要：

为考查水流刺激对宽鳍鱲（Zacco platypus）幼鱼游泳能力和代谢的影响,将60尾实验鱼随机均分为处理组（流水组）和对照组（静水组）;然后在相同的条件下饲养6周,分别于（20±1.0）℃条件下进行临界游泳速度（Ucrit）、静止代谢率（RMR）和活跃代谢率（AMR）的测定,并计算不同游泳速度下的代谢率（MR）、单位位移耗能（COT）和最适游泳速度（Uopt）。结果显示,对照组和处理组的RMR分别为（153.72±7.41）、（197.85±8.00）mgO2·kg^-1·h^-1,对照组显著低于处理组（p〈0.05）;对照组和处理组的Ucrit分别为（62.90±2.84）、（75.50±4.27）cm·s^-1,对照组亦显著低于处理组（p〈0.05）;对照组和处理组的AMR没有显著差异;给定游泳速度下对照组的MR显著高于处理组（p〈0.05）;在较低游泳速度下对照组的COT亦显著高于处理组（p〈0.05）,但这种差异随着游泳速度的上升显著降低（p〈0.05）;对照组和处理组的Uopt分别为54.00、44.00cm·s^-1。研究结果表明,持续水流刺激显著提高了实验鱼的游泳能力,与之上升的游泳效率相关,但代价是维持能量消耗的增加。

英文摘要：

To investigate the effect of water flow stimulation on swimming performance and metabolism of juveniles Zacco platypus, 60 fish were randomly divided into either treatment group （water flow group） and control group （hydrostatic group） and reared under prescribed condition for six weeks at （20±1.0）℃, respectively. Then, the critical swimming speed （Ucrit）, optimal swimming speed （Uopt）, resting metabolic rate （RMR）, active metabolic rate （AMR）, metabolic rate （MR） and cost of transport （COT） at any given swimming speed were measured. RMR were （153.72±7.41） mgO2 · kg^-1 · h^-1 and （197.85±8.00） mgO2 · kg^-1 · h^-1 while Ucrit were （62.90±2.84） cm· s ^-1 and （75.50±4.27） cm· s^-1 in control and treatment group, with those of the control group were significantly lower than the treatment group （p〈0.05）. However, there was no significant difference in AMR between two groups. Fish in control group showed significantly higher MR at any given swimming speed. Furthermore, fish in control group also showed significantly higher COT when swam under low swimming speed （p〈0.05）, but the difference decreased at high swim ming speed （p〈0.05）. The calculated Uopt values based on COT curve were 54.00 cm · s^-1 and 44.00 cm · s^-1 , respectively in control and treatment groups. The present study showed that continuous water stimulation improved swimming ability of experimental fish significantly partly due to improved swimming efficiency with the cost of higher maintenance energy expenditure.