The ecological success of social insects is largely based on the complex organization of their colonies. In a honeybee colony, the adjustment of labor is expected to be highly adaptive. Because biotic and abiotic factors like temperature, brood rearing conditions and nectar availability strongly fluctuate, the honey resources which are shared between all members are of crucial importance for the colonys survival. The questions posed are whether there is a performance-related reward system, what controls individual differences in performance, and how such systems might have ...