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Fig. 1. (A,C) Mean waggle-phase durations (± S.E.M.) of dances elicited by outdoor feeders at three different distances (open circles). The straight line is a linear regression on the data (R=0.99, P<0.01), defined as: waggle phase duration=1.58xdistance travelled+9.8. (A) Mean waggle phase durations (± S.E.M.) recorded in the experiments with the 0°-oriented tunnel (see Materials and methods and Results for details; black circle (o), outbound flight; grey circle (i), inbound flight). (C) Mean waggle-phase durations (± S.E.M.) recorded for the 90°-oriented tunnel (grey circles, (L), to the left; (R), to the right). Also shown are the mean waggle-phase durations measured in the tunnel experiments and their equivalent outdoor flight distances as read off from the regression line. (B,D) Individual scatter (in degrees) of successive waggle-runs measured throughout single waggle dances (mean ± S.E.M.) elicited by outdoor feeders at three different distances (open circles). Data fit an inverse polynomial function (R=0.66, P<0.01), defined as: individual scatter=1.1+3062.4x(distance)^–1. (B) Mean values (± S.E.M.) recorded in the experiments with the 0°-oriented tunnel (black circle (o), outbound flight; grey circle (i), inbound flight). (D) Mean values (± S.E.M.) recorded in the experiments with the 90°-oriented tunnel (grey circles, (L), to the left; (R), to the right). In all cases, different letters indicate statistical differences between groups (see Results for details). The number of animals analysed is shown in parentheses.

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