Table 1. Use of control substrates (Mean±SD) by four amphibian prey species in a chemical cue avoidance experiment with red-banded snakes.

Species	Treatments	Proportion	t-value	P-value
R. catesbeiana	Control	0.48±0.23	0.41	0.69
R. limnocharis	Control	0.51±0.1	0.42	0.68
R. nigromaculata	Control	0.49±0.21	0.24	0.81
Bufo bufo	Control	0.51±.16	0.29	0.78
R. catesbeiana	D. rufozonatum	0.52±0.22	0.42	0.68
R. limnocharis	D. rufozonatum	0.57±0.11	2.979	0.008
R. nigromaculata	D. rufozonatum	0.57±0.14	2.25	0.036
Bufo bufo	D. rufozonatum	0.54±0.18	0.93	0.363

Each trial involved 20 prey animals, and analyses were performed using one-sample t-tests, which evaluated the hypothesis of random use (i.e., 50: 50 use) of substrates. Analyses were performed on transformed proportions.