Fig. 2.

Age and sex differences in the body condition index when experimental birds were moved into acoustic chambers (pre-chamber), after 3 days within acoustic chambers (pre-food restriction) and following 4 days of food restriction (post-food restriction). Thin lines denote individual values, while thick lines connect estimated marginal means from the linear mixed models summarized in Supplementary Table 3. Error bars surrounding estimated marginal means display 95% confidence intervals. Solid lines indicate females while dashed lines indicates males.