Fig. 2

a Mean number of stops per run as a function of structure type and species. There were no significant differences in the number of stops per run between the unbranched and branched structures (P = 0.34) or the structure type-species interaction (P = 0.73), but H. frenatus stopped significantly more than G. oceanica on both structures (P = 0.0003). b Mean number of jumps as a function of structure type and species. The number of jumps per run did not significantly vary as a function of structure type (P = 0.61) or species (P = 0.13). c Mean time to complete structure (TCS) as function of snout-vent length (SVL), species (Hemidactylus frenatus = circles, Gehyra oceanica = squares), and structure type (unbranched = open symbols, branched = closed symbols). TCS did not significantly vary as a function of structure type (P = 0.16), species (P = 0.94), or their interaction (P = 0.88), but varied significantly with SVL (P = 0.037) and the interaction between species and SVL (P = 0.0038). Although TCS does not differ considerably between the two species relative to the variance, TCS of H. frenatus is strongly negatively correlated with SVL, whereas that of G. oceanica exhibits a slight positive relationship with SVL. ** P < 0.001