Table 1 Logistic regression results for attraction (trap preference: chemical vs control) by toad tadpoles. Model structure had main effects of Treatment and Time, with trap nested within pool and responding tadpole clutch as random effects. The main effect of Time was p < 0.0001 for all chemicals. *p < 0.05 for Treatment effect.
From: Chemical cues that attract cannibalistic cane toad (Rhinella marina) larvae to vulnerable embryos
Chemical bait | Treatment | ||
|---|---|---|---|
t | df | p | |
Parotoid gland frozen 0.1 mg | 6.422 | 3 | 0.0077* |
Parotoid gland frozen 1 mg | 7.168 | 4 | 0.0020* |
Parotoid gland frozen 10 mg | 12.702 | 4 | 0.0002* |
Egg extract 0.1 mg | 6.558 | 3 | 0.0072* |
Egg extract 1 mg | 4.751 | 5 | 0.0051* |
Egg extract 10 mg | 10.082 | 5 | 0.0002* |
Early tadpole extract 0.1 mg | 3.755 | 4 | 0.0199* |
Early tadpole extract 1 mg | 3.651 | 5 | 0.0147* |
Early tadpole extract 10 mg | 3.131 | 5 | 0.0259* |
Late tadpole extract 0.1 mg | − 0.404 | 4 | 0.7071 |
Late tadpole extract 1 mg | 4.349 | 4 | 0.0122* |
Late tadpole extract 10 mg | 4.565 | 4 | 0.0103* |
Parotoid secretion MeOH 0.1 mg | 2.853 | 4 | 0.0462* |
Parotoid secretion MeOH 1 mg | 3.320 | 4 | 0.0294* |
Marinobufagin 0.25 µmoles | 1.057 | 5 | 0.3388 |
Marinobufagin 2.5 µmoles | 5.268 | 6 | 0.0019* |
Digitoxigenin 0.25 µmoles | 3.768 | 5 | 0.0130* |
Digitoxigenin 2.5 µmoles | 3.500 | 4 | 0.0249* |
Marinobufotoxin 0.25 µmoles | 0.136 | 5 | 0.8975 |
Marinobufotoxin 2.5 µmoles | 1.801 | 4 | 0.1461 |
Ouabain 0.25 µmoles | 0.410 | 6 | 0.6962 |
Ouabain 2.5 µmoles | 0.894 | 6 | 0.4058 |
Digoxin 0.25 µmoles | 0.501 | 5 | 0.6377 |
Digoxin 2.5 µmoles | 0.539 | 5 | 0.6132 |
Suberoyl-l-arginine 2.5 µmoles | 0.681 | 5 | 0.5262 |
Suberoyl-l-arginine 2.5 µmoles | 0.296 | 4 | 0.7816 |
