Figure 4 | Scientific Reports

Figure 4

From: Formants provide honest acoustic cues to body size in American alligators

Figure 4

The theoretically expected frequencies of F2 and F3, calculated based on measured F1, were higher than the measured F2 and F3 both in water (a) and on land (b). The differences between the measured and the predicted formants (∆ Frequency) were lower on land than in water for both F2 and F3 (c) (*P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.001), indicating that vocal tract configuration is closer to a uniform tube during land-based bellows.

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