Figure 10.

Males perform upwind flight to pheromone but not to heptanal in a wind tunnel. Occupancy maps present side views of the summated tracks of male A. ipsilon in the wind tunnel. n = 37 tracks (100 ng pheromone); n = 21 (0.1% heptanal), n = 18 (1% heptanal), n = 25 (control). The arrow at the right of each diagram indicates the position of the stimulus source and the direction of the wind. The white dot indicates the point of male departure. Scales are given in meters. To draw the map, the summated numbers of recordings of a male presence within a 1 cm square were calculated from the coordinates of 3D tracks and color-coded.