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Fig. 8. Simulation results. Distribution frequency of the size of groups of
successive ants travelling in the same direction at the level of the line
between the bottleneck and the entrance on the nest side of the bridge, when
the simulations were run with increasing values of the flow of ants entering
the bridge. For explanations on the random distribution, see
Fig. 5. The inset shows the
mean group size obtained for different values of entrance flow.