暗纹东方鲀运动训练后游泳能力和呼吸代谢的变化

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

为了探讨增殖放流活动中持续运动训练对暗纹东方鲀游泳运动能力和呼吸代谢的作用,经不同的强度(0.75和1.5 BL/s)和时间(1、2和4周)运动训练后,分别测定暗纹东方鲀的临界游泳速度(U_(crit))、突进游泳速度(U_(brust))、静止代谢率(RMR)和活动代谢率(AMR)。结果表明,低强度(0.75 BL/s)持续训练1周后,暗纹东方鲀的U_(brust)、RMR、AMR无显著变化,而U_(crit)显著提高;持续训练2周,暗纹东方鲀的U_(crit)、U_(brust)、RMR和AMR变化趋于稳定;持续训练4周后U_(brust)、RMR无显著变化,而U_(crit)显著下降(P<0.05),AMR显著提高(P<0.05)。高强度(1.5 BL/s)持续训练2周后,暗纹东方鲀的U_(crit)、U_(brust)、RMR和AMR仍无显著变化;持续训练4周后暗纹东方鲀的U_(crit)、U_(brust)和RMR均无显著变化,而AMR显著下降(P<0.05)。研究结果总体揭示,短期的低强度训练(0.75 BL/s训练1—2周)提高了暗纹东方鲀的临界游泳能力;持续的低强度训练(0.75 BL/s训练2—4周)提高了暗纹东方鲀的活动代谢率,因此,开展适当的运动训练对于提高暗纹东方鲀放流后的运动能力有一定作用,有助于提升放流成活率和放流成效。

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.