Fig. 3.

Mass-specific routine V̇O₂ in normoxia as a function of density in male and female D. melanogaster. Density is shown on both a per respirometer and per ml of respirometer basis. Separate linear regressions for male (n=18) and female (n=25) flies are provided, along with the correlation coefficient and P value for each. Dashed lines represent the extrapolation of each relationship back to the value for a single fly. The slope of the two lines was significantly different (P<0.02, least squares method).