Fig. 4
From: Geckos cling best to, and prefer to use, rough surfaces
Clinging performance of Oedura geckos (N/mm2); three measures per substrate for 24 individuals and five measures per substrate for eight individuals on test substrates. Measures shown are shear stress (residuals of regressing absolute force against toe pad area) by O. castelanui (N = 10), O. coggeri (N = 11) and O. monilis (N = 11) on coarse sandpaper (P40 grit; orange) and fine sandpaper (P400 grit; blue). Dots represent each shear force measure (Newtons) for each individual on coarse sandpaper. Triangles represent shear force measures (Newtons) for each individual on fine sandpaper