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Mandibular gland pheromone contents in workers and queens of Apis mellifera adansonii

Secretions from the mandibular glands of honeybees have been studied extensively, with those of queens dominated by ώ-9 fatty acids and ώ-10 fatty acids dominating those of non-laying workers. Apis mellifera adansonii (Latreille) is one of the widely distributed subspecies of African honeybees. However, its mandibular gland pheromones have not been analysed previously. Using gas...

Pheromonal predisposition to social parasitism in the honeybee Apis mellifera capensis

In honeybees, worker reproduction is mainly regulated by pheromones produced by the brood and the queen. The source of one of the queen pheromones influencing worker reproduction has been located in the mandibular glands. In nonlaying workers, this gland’s profile is dominated by fatty acids that are incorporated into the food given to the brood and to nest mates. After queen...

Worker reproduction in mixed-species colonies of honey bees

To explore reasons for the unusually high rates of worker ovary activation in Apis cerana, we investigated the reproductive physiology of workers in conspecific and mixed-species colonies of A. cerana and its sibling species Apis mellifera under queenright and queenless conditions. In both queenless and queenright conspecific colonies, the proportion of A. cerana workers with...

Control of reproductive dominance by the thelytoky gene in honeybees

H. Michael G Lattorff () Robin F.A Moritz Robin M Crewe Michel Solignac 0 Laboratoire Evolution, Ge nomes et Spe ciation , CNRS, 91198 Gif-sur-Yvette , France 1 Department Entomology and Zoology

Self Assessment in Insects: Honeybee Queens Know Their Own Strength

Contests mediate access to reproductive opportunities in almost all species of animals. An important aspect of the evolution of contests is the reduction of the costs incurred during intra-specific encounters to a minimum. However, escalated fights are commonly lethal in some species like the honeybee, Apis mellifera. By experimentally reducing honeybee queens' fighting abilities...