Fig. 1

Dependence of plasma concentrations of six metabolites and the proportion of VLDL on body energy stores (percent above lean mass, see Methods). The lines (with 95% confidence intervals) are linear relationships derived from the general linear models presented in Table 1. Dots are raw data corrected for time after capture and flight duration (nighttime). Grey dots and lines are for European robins, orange for pied flycatchers and blue for garden warblers