Li Xiuming, Zhang Yaoguang, Li Xiaojin, Zheng Hua, Peng Jianglan, Fu Shijian
Laboratory of Evolutionary Physiology and Behavior, Chongqing Key Laboratory of Animal Biology, Chongqing Normal University, Chongqing 400047, China.
Key Laboratory of Freshwater Fish Reproduction and Development (Education Ministry), Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing 400715, China.
Biol Open. 2018 Feb 20;7(2):bio032425. doi: 10.1242/bio.032425.
The objectives of this study were to examine whether sustained exercise training at four water velocities, i.e. nearly still water (control), 1 body length (BL) s, 2 BL s and 4 BL s, has effects on swimming performance and digestive metabolism in juvenile black carp (). The results demonstrated that fish subjected to sustained training at 2 and 4 BL s showed significantly higher critical swimming speed () and maximum metabolic rate (MMR) over the control group. Fish subjected to sustained training at 1 and 2 BL s showed a significantly (30 and 54%) prolonged duration, 14 and 17% higher postprandial ṀO increment (i.e. ṀO), and 62 and 92% more energy expended on specific dynamic action (SDA), respectively, after consuming a similar meal over fish kept in nearly still water. These results suggest that (1) sustained exercise training at a higher speed (2 or 4 BL s) had a positive influence on the aerobic swimming performance of juvenile , which may be associated with improved aerobic metabolism; and (2) sustained exercise training at a lower speed (1 or 2 BL s) resulted in elevated postprandial metabolic responses in juvenile .
本研究的目的是检验在四种水流速度下进行持续运动训练，即近乎静水（对照）、1体长/秒（BL/s）、2 BL/s和4 BL/s，是否对草鱼幼鱼的游泳性能和消化代谢产生影响。结果表明，在2 BL/s和4 BL/s下进行持续训练的鱼，其临界游泳速度（Ucrit）和最大代谢率（MMR）显著高于对照组。在1 BL/s和2 BL/s下进行持续训练的鱼，在摄入与近乎静水饲养的鱼相似的一餐食物后，餐后耗氧率增量（即ṀO）分别显著延长30%和54%，餐后耗氧率增量分别高出14%和17%，用于特定动力作用（SDA）的能量分别多出62%和92%。这些结果表明：（1）较高速度（2或4 BL/s）的持续运动训练对草鱼幼鱼的有氧游泳性能有积极影响，这可能与有氧代谢的改善有关；（2）较低速度（1或2 BL/s）的持续运动训练导致草鱼幼鱼餐后代谢反应增强。
