Figure 2.

Field-Relevant Concentrations of Imidacloprid Do Not Reduce Rhythmicity in Isolated Bumblebee Foragers in Constant Darkness

(A) Proportion of Bombus terrestris foragers that were arrhythmic (RS ≤ 1.5) in DD for foragers on control food or food containing 1 or 10 μg/L imidacloprid (IM).

(B) Mean rhythmicity (RS) for foragers in each treatment group in DD conditions (F_2,47 = 0.5, p = 0.637).

(C) Mean locomotor activity for foragers in each treatment group in DD conditions, during the subjective day (F_2,47 = 0.1, p = 0.947) and night (F_2,47 = 0.6, p = 0.541). Each data point in the histograms represents a single bee, n = 14–22 bees for each treatment.

Data are represented as mean ± SEM, tested via one-way ANOVA with Tukey's multiple comparisons.