CHASING BEHAVIOUR OF MALE HOUSEFLY (MUSCA)
雄蝇追逐行为的分析

Chasing behaviour experiments and analyses of male housefly (Musca) under a condition of free flight were reported. The preliminary results are as follows:1. The horizontal turning angular velocity dF1(t0) of male chasing fly linearly depends on the horizontal error angle T1(t0- t) of female leading fly. If the female leading fly is located in front visual field the slope of regression line is about 37, otherwise the slope of regression line is about 6. 7.2. The pitch angular velocitv dF2 (t0) depends on the pitch error angle T2(t0 - t), too. There is a linear relation between the two variables in a wide range.3. In chasing behaviour of male fly, the histogram of frequency number N1 of horizontal error angle T1 presents almost symmetric distribution in which a peak locates at zero degree, but the peak of histogram of frequency number N2 of pitch error angle T2 locates about 20 degrees.4. Male chasing fly controls its velocity of flight according to the distance change dD between the two flies and stereo-error angle. If the female leading fly is located in front visual field the values of dD are usually negative, it means that the two flies get closer and the acceleration of male chasing fly linearly depends on the distance change dD. If the female leading fly is located in the back of visual field the valuses of dD are usually positive, it mean s that the distance between the two flies increases.5. The delay between input variables and response variables attributes to the processing time of neural circuit, the responsd time of servo-actuator and movement inertia of the fly.