The Effect of Exercise Training on the Swimming Performance and Metabolic Rate in Juvenile Common Carp(Cyprinus carpio)

To investigate the effect of exercise training on the swimming performance and metabolic rate during swimming in juvenile common carp(Cyprinus carpio),90 juvenile fish(8.12±1.30) g was forced to swim under 60% critical swimming speed(Ucrit) for 0 h(control),6 h and 12 h daily for 15 d.Then three groups of fish were underwent both an Ucrit and fast-start measurement.The oxygen consumption rate(MO2) at different swimming speed was also measured.Neither Ucrit nor fast-start performance as indicated by maximum velocity(Vmax),maximum acceleration velocity(Amax) and travel distance during first 12 ms(S120 ms) significantly changed after 15 d training in juvenile common carp.However,the MO2 at 20 and 36 cm s-1 of fish in 6 h training group were significantly lower than those in control group while the MO2 at all swimming speed of fish in 12 h training group were significantly higher than those of control group(p0.05).It suggested that the cost of transport decrease after moderate exercise training(6 h),however,high intensity training(12 h) may impair the cost of transport by increased basal metabolic rate.