Figure 3 in Native food spectrum, size-matching and foraging efficiency of the Mediterranean harvester ant Messor wasmanni (Hymenoptera: Formicidae)

Figure 3. Scatter diagram load size versus ant size. Data are from random samples of returning foragers of a single M. wasmanni colony. One dot represents one observation (N = 776). Linear regression analysis revealed a very low positive correlation (R² = 0.02, p = 0.0001) between ant size and load size, indicating only a small tendency for majorsized workers to carry larger loads than minor-sized workers. Residuals from regressions were approximately normally distributed around zero in all cases.