Fig. 4. Values of nine EMG variables plotted against prey distance for all recorded feeding events in five individuals of Hydromantes imperialis (Hi 1–5, labeled as different symbols), with least-squares regression lines and coefficients of determination. Relative duration (A) and relative peak times (C) show weak negative correlations with prey distance compared to relative onset times (B), which clearly shows how the SARP activation is piecemeal at short prey distances and all at once at greater prey distances. Mid–Post, middle–posterior; Ant–Mid, anterior–middle; Ant–Post, anterior–posterior.