Figure 1: The effect of queen and brood presence on the average oocyte size of Bombus impatiens workers. Pair of newly emerged workers were assigned to four treatments and kept for three days with the queen (CQ), young brood (CB), the queen and young brood (CBQ), or alone (C). The numbers in parentheses denote the number of workers per treatment. Different letters above columns indicate statistical differences at α =0.05