齐口裂腹鱼上溯洄游过程中的感官圈解译研究

选取西南地区典型鱼类齐口裂腹鱼（Schizothorax prenanti，（32.32±2.73） cm）作为实验对象，测试鱼类在上溯过程中应对不同水流环境时的游泳行为，解译不同大小网格尺寸下鱼类的游泳速度、转向次数以及转角和转角差与真实游泳轨迹的匹配程度.结果表明：采用小于或等于0.30m尺寸的网格时，分析得出的鱼类上溯运动平均游泳速度、转向次数以及转角和转角差均与实际情况无显著性差异，另外鱼类更偏向于在0.20~0.40m/s的流速区间内以和水平方向呈-49°~49°的运动搜索范围进行上溯运动.

Interpretation of sensory query distance during upstream migration of Schizothorax prenanti

In this paper, an endemic fish located in Southwest China, Schizothorax prenanti (32.32±2.73)cm, was selected as the research object to test the volitional swimming behavior during the upstream migration in an open-channel flume with alternative flow regimes, and to interpret the extent to which swimming speed, turning times, angle and angle difference under different mesh sizes can match with the real swimming trajectory. The results showed that when the mesh size was less than or equal to 0.30m, there was no significant difference between the average swimming speed, the number of turns, the angle and the difference of turns with real swimming data. In addition, fish are more inclined to swim in the velocity ranged from 0.20 to 0.40m/s with the search angle ranged from -49º to 49º in horizontal direction.