Fig 1. Starvation-induced changes in the δ¹³C of the exhaled breath of insects.

Adult grasshoppers (A) and cockroaches (B) raised on diets supplemented with ¹³C-palmitic acid tracers (grey) or ¹³C-leucine tracers (black). The dashed line represents the δ¹³C of the breath in postabsorptive insects at the start of fasting. Error bars represent standard deviations. The bold lines indicate time points at which fasting values were statistically different from the prefasting values according to two-way, one-sample t-tests.