Figure 3
From: Chemical cues that attract cannibalistic cane toad (Rhinella marina) larvae to vulnerable embryos
The degree to which cane toad (Rhinella marina) tadpoles were attracted to a range of stimuli from conspecifics: (a) frozen parotoid gland, (b) toad eggs, (c) early-development tadpole extracts, (d) late-development tadpole extracts, (e) fresh parotoid secretion, and pure compounds: (1) marinobufagin, (14) digitoxigenin, (6) marinobufotoxin, (15) ouabain, (16) digoxin, (13) suberoyl-l-arginine, as quantified by the numbers captured in baited versus control traps. Data plotted are the odds of a tadpole selecting a trap baited with chemical compared to a control bait. The dashed horizontal line at odds ratio of attraction at 1 shows the null expectation (no disparity between baited and control traps) if there is no significant attraction. The points show means and standard errors. Treatments with the same chemical composition, differing only in concentration, are linked by dotted lines.
