EXERCISE TRAINING ON THE SWIMMING PERFORMANCE AND RESPIRATION METABOLISM OF TAKIFUGU OBSCURUS

In order to investigate the effect of continuous exercise training on the swimming performance and respiration metabolism of Takifugu obscurus during proliferation and release activities, the critical swimming speed (U_crit), burst swimming speed (U_brust), resting metabolic rate (RMR) and active metabolic rate (AMR) of T. obscurus were measured after exercise training at different intensities (0.75 and 1.5 BL/s) and durations (1, 2 and 4 weeks). The results showed that after 1 week of continuous training at low intensity (0.75 BL/s), U_brust, RMR and AMR had no significant changes, while U_crit was significantly increased. Following 2 weeks of continuous training, U_crit, U_brust, RMR and AMR remained reletively stable. After 4 weeks of continuous training, U_brust and RMR showed no significant change, while U_crit decreased significantly (P<0.05) and AMR increased significantly (P<0.05). After 2 weeks of high intensity (1.5 BL/s) training, there were no significant changes in U_crit, U_brust, RMR and AMR of T. obscurus. After 4 weeks of continuous training, U_crit, U_brust and RMR did not change significantly, while AMR decreased significantly (P<0.05). The results showed that short periods of low-intensity training (0.75 BL/s training for 1 to 2 weeks) improved the critical swimming capacity of T. obscurus, while continuous low-intensity training (0.75 BL/s training for 2—4 weeks) increased the active metabolic rate of T. obscurus. Therefore, proper exercise training may play a certain role in improving the swimming capacity of T. obscurus after releasing, which is helpful to improve the survival rate and releasing effect.