中文摘要：

在水温25.0℃条件下,采用高速摄像机记录电刺激后体长（6.9±0.1）cm相近的23尾中华倒刺鲃幼鱼的快速启动过程并通过对鱼体质心运动的分析考查3个阶段的相关运动参数。结果显示：实验鱼均表现为＂C型＂快速启动模式,逃逸方向不确定,但不同逃逸方向的相关参数间无显著差异（P〉0.05）;快速启动后鱼体质心的移动距离（d）和线速度（V）均显著递增（P〈0.05）,其中线速度在第2阶段末（36ms）达到最大值,随后相对稳定,线加速度（a）在第2阶段末出现最大值（P〈0.05）;而角速度（ω）初始启动即出现最大值,随后显著下降（P〈0.05）,进入第3阶段后稳定在较低水平;第1阶段的线速度（V）与相对旋转半径（RTr）之间相关性不显著。研究结果表明：中华倒刺鲃幼鱼在快速启动过程中更倾向于采取提高运动速度的逃逸策略,这可能与其流线形体型和水流湍急的生境有关。

英文摘要：

At water temperature（25.0±0.5）℃,the movement trajectories of the center of mass（CM）of electricity-stimulated juvenile Spinibarhus sinensis（body length（6.9±0.1）cm,n=23）during its fast-start escape response were recorded by using high-speed cinematography,and the kinematics at three stages of the fast-start performance was analyzed.The results showed that all the escape responses observed were of C-type fast-start with either a right or a left turning direction,and there were no significant differences in the kinematics of fast-start performance with different directions（P0.05）.The distance（d）of the CM during the whole escape response process increased significantly（P0.05）,while the linear velocity（V）increased significantly（P0.05）at the beginning and reached its maximum（36 ms）by the end of stage 2.The linear acceleration（a）presented the highest value by the end of stage 2（P0.05）and the lowest value at stage 3.The angular velocity（ω）presented the highest value at the beginning of fast-start response,decreased significantly（P0.05）at the first and second stages,and remained unchanged at a lower level at stage 3.There was no significant relationship between V and relative turning radius（RTr）at stage 1.The results indicated that juvenile S.sinensis favored higher velocity escape strategy in fast-start process,possibly due to its streamline shape and rapid water habitat.