Fig. 4. Comparison of the average magnitude of rotation (light grey) and average peak velocity of hyoid depression (dark grey) for three C. gariepinus individuals (1-3) capturing three different prey (illustrated above) during X-ray video recording [kinematic data from Van Wassenbergh et al. (Van Wassenbergh et al., 2005)]. The graph shows that suction effort on the relatively small, spherical prey attached on the tip of a needle (left) is not reduced compared to suction feeding sequences on firmly attached prey (shrimp; middle) or large, voluminous prey pieces (fish; right). Values are means ± s.d.; N=10, 5 and 5 for the three prey, respectively (for each individual).