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Fig. 10. Estimation of length of home vector from time spent running by slipping crabs. (A) Observed running distance Dobs (open circles) and estimate of home vector length Dest (filled circles) plotted against starting distance D, which is assumed to be equal to true home vector length. (B) Relative error in estimate of home vector length (Dest/D) plotted against observed running time. Lines of best fit, calculated by the method of least squares. See text for details.