The circadian clock uses different environmental time cues to synchronize emergence and locomotion of the solitary bee Osmia bicornis.

On the other hand the bees emerging under LD cycles seem to be hardly synchronized and the RI is just below the significance level (RI = 0.09) (Fig. 1B /LD ).

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The RI represents the third peak in the smoothed autocorrelation function and defines the significance of the rhythm (RI > 0.3 = highly significant, 0.1 < RI < 0.3 = significant, RI < 0.1 = not significant).

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