Fig. 1. The effect of varying tunnel length on the mean waggle duration (black bars) and the mean pure waggle duration (white bars) of bees returning to the hive after being rewarded inside the tunnel. Values are means ± S.D. for each experimental condition; in this and all figures, B denotes the number of bees, N the number of dances analysed, and n the total number of loops (waggle + non-waggle) analysed. The walls and floor of the tunnel (length 2, 4, 6 or 8 m) were lined with a checkerboard pattern in all but two cases, where axial stripes were used instead. The table on the right of the histogram shows the results of a pair-wise Fisher's Least Significant Difference Test for differences in the values of mean waggle duration; *P<0.05; **P<0.01; NS, no significant difference (P>0.05). Ax, axial; Ch, checkerboard.

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