Fig. 2.

Nutritional regulation in young honeybees and foragers. The demand for EAAs decreases when worker honeybees become foragers (n = 10 cohorts of 20 bees each per rail). a Newly emerged workers confined to diets of specific proportions of EAAs and sucrose regulated their intake around an IT of 1:50. b The total volume of diet solution consumed by young bees depended on the proportion of EAAs and carbohydrates in the diet (one-way ANOVA, 1:50 × all other diets, all P < 0.033). c Foragers use an asymmetric rule of compromise when regulating their intake, such that intake is always skewed towards carbohydrates; the IT was estimated to 1:250. d The average daily volume consumed by foragers did not depend on diet