Various levels of wax deprivation in honey bee (Apis mellifera) colonies induced shifts in the temporal pattern of division of labour in worker honey bees. The most extreme wax stress induced an earlier onset of foraging, and an increase in comb building and the production of wax scales. Moderate wax stress induced only an increase in comb building and production of wax scales. No significant differences in development of hypopharyngeal gland acinal diameter were found, suggesting that production of wax and brood food and associated behaviour patterns develop and decline independently. The graded changes in behavioural response to various levels of stress found in this study support the concept of a reserve labour force in honey bee colonies, which can respond to stress through shifts in caste ontogeny.
Epigenetic Modifications May Regulate the Activation of the Hypopharyngeal Gland of Honeybees (Apis Mellifera) During Winter
