Glossary
The mutual exchange of food (regurgitated nectar and honey) between adult honey bees through mouth-to-mouth contact. Trophallaxis serves as the primary food distribution system within the colony and simultaneously transfers pheromones, chemical information, and immune factors between nestmates.
A single forager bee cannot bring enough food back to the hive to feed the entire colony. Instead, foragers return with nectar in their honey stomachs and distribute it through trophallaxis: a receiver bee extends her proboscis, the giver regurgitates a droplet of nectar, and the receiver takes it in. The receiver then either stores the nectar in a comb cell for processing into honey, consumes it herself, or passes it along to another bee through another trophallaxis event. Within minutes, a single forager's load can propagate through a network of 10 to 20 receiving bees, distributing food throughout the colony.
Trophallaxis transfers far more than calories. Queen pheromone (QMP) is distributed colony-wide through the same food-sharing network, maintaining the social cohesion and reproductive suppression that holds the superorganism together. Immune factors (antimicrobial peptides, shared gut microbiome components) are transferred between individuals, providing a form of social immunity. Chemical information about food sources (flavor compounds from nectar) communicates what is available in the field, supplementing the waggle dance with taste information.
Nurse bees feed larvae through a modified form of trophallaxis, depositing brood food (a mixture of hypopharyngeal gland secretions and honey) into the larval cells. Royal jelly, fed exclusively to queen-destined larvae, is produced by the hypopharyngeal and mandibular glands of young nurse bees, and delivered through this same head-to-cell feeding mechanism.
Yes. Trophallaxis is the universal food distribution mechanism. Foragers share with house bees, house bees share with nurse bees, nurse bees feed larvae. Even drones (males) are fed through trophallaxis by worker bees. The queen is fed exclusively through trophallaxis by her attendant workers. No bee in the colony is more than a few trophallaxis exchanges from any forager's latest load.
Studies using radioactively labeled sugar syrup have shown that a single forager's load can reach over 50% of the adult bees in a colony within 24 hours through the trophallaxis network. The distribution follows a network pattern similar to how information spreads through social networks.
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