Figure 1.

Post-hatching behaviour of Ambystoma annulatum larvae that had been exposed as embryos to chemical stimuli from predators (cannibalistic conspecifics), non-predators (tadpoles of R. catesbeiana) or to a blank control. (a) Activity measured as total number of lines crossed in 5 min (mean±1 s.e.). Statistical analysis was an ANOVA followed by Tukey's post hoc comparisons; different letters indicate significant differences. (b) Habitat choice measured as proportion of larvae found in the plants after 5 hours. Statistical analysis was the Fisher's exact probability test; ^*p=0.011; n.s., p>0.15.