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Figure 1


Fig. 1. Drag versus water depth for S. nigriventris (inset) for dorsal side up (A) and inverted posture (B) for water velocities of 0.38 m s–1 (open squares), 0.47 m s–1 (open diamonds), 0.55 m s–1 (open triangles) and 0.63 m s–1 (crosses). Values are means ± 2 s.e.m. For N values, see text. In all cases, r2>0.9, P<0.05.