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(a) Weight of sugar available (±SE) every 90 min for 50 staminate and 50 pistillate flowers (500 flowers in total) and (b) average number of Bombus terrestris in the crop and on the margin over time, data were summed per transect in either the crop or on the margin and averaged by site (n = 10), all sites contained commercial colonies of B. terrestris. Significant independent t tests are indicated with an asterisk (*) for each time point (p < 0.05)
