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Figure 5


Fig. 5. (A) Swimming speed of A. aculeatus using the head raised (HR, black) vs flat, dorsoventrally compressed (DVC, gray) body forms. DVC swimming was consistently faster per individual than HR swimming (paired t-test P=0.004). (B) Relative speed of modes. Mean speeds of A. aculeatus during modes of locomotion measured in BL s-1 (Freidman test statistic 16.00; P=0.003). Horizontal lines are drawn over groups that are not significantly different from each other, as determined by pairwise Wilcoxon signed rank tests adjusted for multiple comparisons ({alpha}e=0.005). Maximum speeds are given above these lines. Bars indicate standard error (s.e.m.), N=10 (jet), 9 (swim), 5 (walk), 5 (multi-armed walk), 10 (crawl). (C) Absolute speed of modes. Mean speeds of A. aculeatus during modes of locomotion measured in cm s-1 (Freidman test statistic 11.80; P=0.019). Horizontal lines are drawn over groups that are not significantly different from each other, as determined by pairwise Wilcoxon signed rank tests adjusted for multiple comparisons ({alpha}e=0.005). Maximum speeds are given above these lines. Bars indicate s.e.m., N=8 (jet), 9 (swim), 5 (walk), 5 (multi-armed walk), 10 (crawl).