Fig. 2.

Prandial behavior analyzed in the CAFE. (A) Intake by three individually housed male flies fed 5% sucrose + 5% yeast extract measured in 10-min intervals. A vertical rise flanked by two intervals of no intake was defined as a meal. (B) Intake by individual flies fed 5% sucrose. (C) Meal volume and frequency can be decoupled by modulating nutrient conditions. On 5% sucrose, average meal size increases, whereas meal frequency is unchanged; 5% sucrose + 5% yeast extract: n = 10 flies, 52 meals; 5% sucrose: n = 4 flies, 18 meals. All values are given as averages ± SE. ∗, P ≤ 0.01, two-tailed t test.