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Fig. 9. Reserve capacity (%) in muscle mass-specific power output (Pres) vs body mass (Mb) for hovering Xylocopa varipuncta females. Assumed drag coefficient (CD)=1 (bottom panel) and 3 (top panel). Model II regression for CD=1: Pres=47.70–47.85Mb, r26=–0.37, P=0.05 (solid line). Model II regression for CD=3: Pres=54.74–59.05Mb, r26=–0.11, P=0.59.