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Fig. 8. Log muscle mass-specific power output during normal (Pmuscle,norm; open symbols) and maximal hovering flight (Pmuscle,max; filled symbols) vs log body mass (Mb) for Xylocopa varipuncta females. Assumed drag coefficient (CD)=1 (bottom panel) and 3 (top panel). Model II regression for CD=1: log Pmuscle,norm=2.517+1.126(log Mb), r27=0.82, P<0.001 (broken line); log Pmuscle,max=2.538+1.007(log Mb), r26=0.81, P<0.001 (solid line). Model II regression for CD=3: log Pmuscle,norm=2.909+1.160(log Mb), r27=0.76, P<0.001 (broken line); log Pmuscle,max=3.210+4.762(log Mb), r26=0.17, P=0.38.