Fig. 5. Effect of build up or depletion of secretion on pad adhesive stress (A,B) and shear stress (C,D) for G. viridula. A and C show the result of multiple slides on the same area of glass allowing the fluid to build up; B and D show repeated slides, each time on a fresh area, depleting the fluid. Plot shows medians (centre lines), interquartile ranges (boxes), and the largest and smallest values (whiskers) that are not outliers (circles); N=5.