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在25℃水温下,采用特制的鱼类游泳行为测定装置对实验鱼在静水和0.1、0.2和0.25m·s-1流速下的游泳状态、游泳速度、趋流率和摆尾频率等参数进行测定,研究水流速度对鱇(鱼良)白鱼(Anabarilius grahami)游泳行为的影响。结果表明:有流速组的趋流率显著高于静水组,但不同流速组间的趋流率无显著差别;在0～0.2m·s-1流速范围内,摆尾频率随流速加快而显著增大,但在0.25m·s-1流速下40min后摆尾频率显著低于0.2m·s-1流速组;随着流速的增大,主要游泳状态由逆流前进变为逆流静止;在有流速组,顺流而下状态所占时间比例相对其他游泳状态都较少;在逆流游泳的3种状态中,游泳速度均随流速的增加而增大,在顺流而下状态中,游泳速度和水速间无显著相关;游泳速度、摆尾频率和水流速度两两之间均存在显著的线性相关。
Specimens of swimming fish were used to measure the swimming state, swimming speed, flow rate and tail-tailed frequency of experimental fish under the condition of still water and 0.1, 0.2 and 0.25m · s-1 flow rate at 25 ℃ water temperature The effects of water velocity on the swimming behavior of Anabaena grahami were studied. The results show that the flow rate of the flow velocity group is significantly higher than that of the static flow group, but there is no significant difference in flow rate between the flow velocity groups. In the flow velocity range of 0 ~ 0.2m · s-1, But at 0.25 m · s-1, the tail-end frequency was significantly lower than that of 0.2 m · s-1 at 40 min. With the increase of flow rate, the main swimming state changed from countercurrent to countercurrent, In the three kinds of states of countercurrent swimming, the swimming speed increases with the increase of the flow rate. In the downstream state, the swimming speed There was no significant correlation between water speed and swimming speed, swimming frequency, tail frequency and water flow velocity.