Scaling coefficients [RMA intercept ± 95% confidence limits (CL)] and exponents [RMA slope, with asymmetric 95% confidence interval (CI)] for maximum pelvic sucker area (MSA), pelvic suction pressure differential (ΔPps) and pelvic suction force (Fps) for adhesion predicted from body mass (BM) of Stenogobius hawaiiensis and Sicyopterus stimpsoni at three incline levels (45, 90 and >90 deg) of climbing slope