Figure 2. Linear regressions between biological parameters (number of external activity of workers, egg-laying rate, food stocks (total weight) and brood cells (for details on parameter estimation, seeMaterials and Methods ) and colony size (adult bees) of each bee species studied (Melipona flavolineata [8 colonies],Melipona fasciculata [9], Scaptotrigona aff.postica [13], Frieseomelitta longipes [9] andPlebeia minima [12]).