JEB -- Roberts et al. 207 (6): 993 Figure IG4

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Fig. 4. Stroke amplitude during normal hovering ( ${Phi}$ _norm; open symbols) and maximal hovering ( ${Phi}$ _max; filled symbols) vs body mass (M_b) for Xylocopa varipuncta females. Model II regression: ${Phi}$ _norm=88.22+35.58M_b, r₂₉=0.84, P<0.001 (broken line); ${Phi}$ _max=128.26+11.62M_b, r₂₈=0.03, P=0.89.