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Fig. 3. Values of nine EMG variables plotted against prey distance for all recorded
feeding events in five individuals of Hydromantes imperialis (Hi
15, labeled as different symbols), with least-squares regression lines
and coefficients of determination. EMG area (A) and amplitude (B) show weak
positive correlations with prey distance compared to EMG duration (C). Post,
Posterior; Mid, middle; Ant, anterior.