摘要:
对鲻鱼(Mugil cephalus)、鲈鱼(Lateolabrax japonicus)、黄鳍鲷(Sparus latus)、鲤鱼(Cyprinus carpio)和草鱼(Ctenopharyngodon idellus)5种幼鱼进行了视觉运动反应实验。反应率随照度的降低或屏幕转速的提高而下降。高限可跟刺激频率随照度而提高,在102lx下,鲻鱼达37次/秒,鲈鱼26次/秒,黄鳍鲷27次/秒,鲤鱼24次/秒,草鱼29次/秒。明暗视过渡照度值:鲻鱼100—101lx,鲤鱼和草鱼10-1—100lx,鲈鱼和黄鳍鲷10-2—10-1lx。照度和刺激频率对反应潜伏期有一定影响。跟随角速度普遍落后于屏幕角速度,即跟随率低于100%,并且随屏幕转速提高而下降。照度对跟随率无明显影响。几种幼鱼对运动条纹的反应可分为三阶段:跟随、活泼运动、无反应。
Abstract:
This paper reports the results of the experiment in optomotor reaction about five young fishes, grey mullet (Mugil cephalus), perch (Lateolabrax japonicus), porgy (Sparus latus), carp (Cyprinus carpio) and grass carp (Ctcnopharyngodon idellus).Reaction rate of these fishes decreases as the intensity of illumination weakens or the screen rotary velocity increases. Upper followable stimulus frequency (UFSF) rises with the intensity of illumination. Under 102 Ix, grey mullet's UFSF is as high as 37/sec ; perch's 26/sec ; porgy's, 27/sec ; carp's. 24/sec and grass carp's, 29/sec. Transitional illumination from scotopic to photopic vision is 100—101 Ix for grey mullet; 10-2—10-1 Ix for perch and porgy; 1.0-1—100 Ix for carp and grass carp. The stimulus frequency and illumination have a little influence on latent perirod. Following angular velocity is, on the whole, less than screen rotary velocity, i.e. the following rate is less than 100%, and it decreases as rotation velocity rises. Illumination has little effect on following rate. The reaction of these fishes to moving strips consists of three stages: following, actiwely swimming and no responding.
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