ESCAPE RESPONSE OF ZEBRA DANIO (BRACHYDANIO-RERIO) .1. STIMULUS FOR ESCAPE
ESCAPE RESPONSE OF ZEBRA DANIO (BRACHYDANIO-RERIO) .1. STIMULUS FOR ESCAPE
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DOI：
10.1016/s0003-3472(74)80022-9
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发表时间：
1974-01-01
期刊：
影响因子：
2.5
通讯作者：
DILL, LM
中科院分区：
文献类型：
--
作者：
DILL, LM
这一假说被验证为斑马丹尼欧(Brachydanio Rerio)对接近的捕食者的反应是当捕食者在猎物眼睛处遮盖的角度的变化率(dα/dt)超过某个阈值水平时。丹尼奥斯被展示了两种类型的人工捕食者：一种是大小和速度可以改变的模型捕食者，另一种是正在接近的物体的电影。飞行反应距离(RD)可由以下关系式预测：RD=[(vs/k)−(S2/4)]1/2式中，V为捕食者接近速度(cm/S)，S为捕食者前缘直径(Cm)，k1为视角变化率(弧度/S)。K的最佳总体估计值为0.43rad/S，反应场为圆形，说明该机制不是单纯的双目机制。逃逸速度虽然对真实捕食者的反应高于对人工捕食者的反应，但与反应距离无关。
The hypothesis was tested that zebra danios (Brachydanio rerio) react to an approaching predator when the rate of change of the angle subtended by the predator at the prey's eye (dα/dt) exceeds some threshold level. Danios were presented with real predators (largemouth bass,Micropterus salmoides) and artificial predators of two types: a model predator, whose size and velocity could be varied, and a film of an approaching object. The reactive distance for flight (RD) could be predicted from the relationship:RD=[(VS/k)−(S2/4)]1/2whereVis the predator approach velocity (cm/s),Sis the predator front diameter (cm), andkis the threshold rate of change of visual angle (radians/s). The best overall estimate ofkwas 0·43 rad/s. The reactive field was shown to be circular, demonstrating that the mechanism is not solely a binocular one. Escape velocity, though higher in response to real than to artificial predators, was not correlated with reactive distance.