Fig. 8. Distributions of movement speed and turning angles of real and simulated searchers. Data from all paths in a particular group were pooled. Turn angle is the absolute difference between the heading measured over successive frames (crabs) or simulation steps. Values are from real (open triangles) or simulated crabs (filled squares and circles; rheotaxis weighting in parentheses). Sample sizes, representing the number of video frames in all 14 paths in each group, were 758, 2100 and 2504 for simulated searchers with a rheotaxis weighting of 0.7, simulated searchers with a rheotaxis weighting of 0.5 and real crabs, respectively.

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