COMPENSATION FOR HEIGHT IN THE CONTROL OF GROUNDSPEED BY DROSOPHILA IN A NEW, BARBERS POLE WIND-TUNNEL
COMPENSATION FOR HEIGHT IN THE CONTROL OF GROUNDSPEED BY DROSOPHILA IN A NEW, BARBERS POLE WIND-TUNNEL
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DOI：
10.1007/bf00612014
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发表时间：
1982-01-01
期刊：
影响因子：
--
通讯作者：
DAVID, CT
中科院分区：
文献类型：
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作者：
DAVID, CT
所有的实验都是在一个新的水平风洞中对自由飞行的果蝇进行的，在这个风洞中，视觉输入是通过圆柱形工作段周围旋转的螺旋图案的表观轴向运动提供的。这些苍蝇沿着隧道中线狭窄的引诱剂气味羽流逆风飞行，因此它们的视觉输入是特定的。当图案与苍蝇保持恒定距离时，它们通过以空速飞行来控制地面速度，从而使图像移动的角速度保持恒定，而不是眼睛上条纹交替的恒定频率。因此，无论风速如何，它们都以相同的地面速度飞行。当图案与苍蝇的距离发生变化时，苍蝇会在变化时调整自己的空速，以保持相对恒定的地面速度。他们通过改变他们保持不变的图像移动的角速度来做到这一点。当图案与果蝇的距离逐渐改变时，果蝇不会调整它们保持不变的图像移动的角速度，而是在圆锥体上而不是在一个台阶上。因此，它们的地面速度并不是恒定的。很可能，苍蝇使用视差信号来调整它们保持不变的图像移动的角速度，这些视差信号来自可见的不同视角速度，这些视角速度可见在图案距离的每一步的两边并列。
All experiments were performed on freely flying Drosophila hydei in a new, horizontal wind tunnel where the visual input was provided by the apparent axial movement of rotating helical patterns surrounding the cylindrical working section. The flies were flown upwind along a narrow plume of attractant odor in the mid-line of the tunnel so their visual input was specified. When the pattern was at a constant distance from the flies they controlled their ground speed by flying at an airspeed such that there was a constant angular velocity of image movement rather than a constant frequency of stripe alternation over their eyes. They thus flew at the same ground speed regardless of wind speed. When the distance of the pattern from the flies changed in a step, the flies adjusted their air speed at the change so as to keep a relatively constant ground speed. They did this by changing the angular velocity of image movement that they held constant. When the distance of the pattern from the flies changed gradually, on a cone rather than in a step, the flies did not adjust the angular velocity of image movement that they held constant. Their ground speed thus did not remain constant. Probably, the flies used parallax cues, from the different apparent angular velocities visible juxtaposed on either side of a step in pattern distance, to adjust the angular velocity of image movement that they held constant.