Fig. 5. Scatterplots of mass-specific power output versus speed for all strides obtained for both gecko species. (A) Mass-specific power output against speed for H. garnoti under five loading conditions (filled circles, unloaded; open squares, 2% BM; filled triangles, 100% BM; grey inverted triangles, 150% BM; grey diamonds, 200% BM). We obtained one extremely high value of mass-specific power output under the 150% loading condition. (B) Mass-specific power output against speed for G. gecko under two loading conditions (filled circles, unloaded; filled triangles, 100% BM). Extrapolation of maximal mass-specific power output to maximal speed (R. Van Damme, unpublished data) gives a value of 14.17 W kg^-1 (filled circles). For both species, most of the loading conditions tend to level off near P_max, supporting the hypothesis that mass-specific power output limits speed in these lizards.