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Figure 5


Fig. 5. Mean values (± s.e.m) of kinematic variables. (A) Cycle duration, tcycle. (B) Percent of time in static contact, %stat. (C) Forward displacement per cycle, {Delta}x. (D) Mean forward velocity, Vx. (E) Forward velocity of crossing points, Vx,cr. The downhill data were omitted from A–C because snakes did not stop periodically. Values for the largest two tunnel widths in A, B and C are only from the single individual who performed concertina locomotion, whereas D includes values from two additional individuals that performed lateral undulation.





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