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Figure 6


Fig. 6. Hind leg movements of a restrained Aphrophora recorded simultaneously by a camera capturing images at 1000 s-1 and with an exposure of 0.25 ms and by a photoelectric device (see Materials and methods). (A) Two sequential images, the first showing the hind legs fully levated before the attempted jump and the second after the rapid movement. The inset drawings show the position of the hind legs in these two frames. Note the small piece of reflective tape on the hind femur. The outputs of the photoelectric device during six jumps were captured at a sampling rate of 45 kHz and low-pass filtered at 2 kHz. One trace in blue shows the unfiltered recording. The leg movements were complete in 0.3 ms. (B) Seven attempted jumps by a second Aphrophora show that the movement was again complete in 0.3 ms.





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