Effects of Surface Roughness on the Locomotion of a Long-Tailed Lizard, Colobodactylus taunayi Amaral, 1933 (Gymnophthalmidae: Heterodactylini)

Table 4

Results of linear regressions through the origin (zero intercept) of both Z-transformed values of stride frequency (SFR) and relative stride length (RSL). The angular coefficients (b), their respective standard errors (SE), and 𝑃 values are shown with the coefficients of determination (𝑟²) and the Spearman correlation coefficients (𝑟_𝑠). Sample size is 𝑛=72 for each substrate and 𝑛=288 for all substrates pooled. Only WOOD × SAND (𝑡=2.1, 𝑃<0.05) resulted in a significant pairwise contrast among slopes for different substrates.

Substrate	PLAS	WOOD	SAND	GRAV	All
𝑏	0.496	0.216	0.696	0.332	0.471
SE	0.050	0.121	0.113	0.118	0.052
𝑃	0.0005	0.0790	0.0005	0.0070	0.0005
𝑟^2	0.586	0.043	0.347	0.100	0.222
𝑟𝑠	0.747	0.289	0.564	0.329	0.457