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The behaviour of drifted Cape honeybee workers (Apis mellifera capensis): predisposition for social parasitism?

HEPBURN 2 0 Lehrstuhl für Verhaltensphysiologie und Soziobiologie, Zoologie II. Biozentrum der Universität Würzburg , Am Hubland, 97074 Würzburg , Germany 1 Department of Statistics, Rhodes University

Clinal nature of the frequencies of ovarioles and spermathecae in Cape worker honeybees, Apis mellifera capensis

It was determined that 300 Cape workers, Apis mellifera capensis (collected from each of 6 colonies at each of 5 localities about 200 km apart along an 800 km transect in the Western and Eastern Cape Provinces, South Africa) was the sample size required to statistically estimate the proportions of workers with spermathecae at each location at 95% confidence levels. Because of the...

Aggressive and Docile Colony Defence Patterns in Apis mellifera. A Retreater–Releaser Concept

Colony defence in Apis mellifera involves a variety of traits ranging from ‘aggressive’ (e.g. entrance guarding, recruitment of flying guards) to ‘docile’ (e.g. retreating into the nest) expression. We tested 11 colonies of three subspecies (capensis, scutellata, carnica) regarding their defensiveness. Each colony was selected as reportedly ‘aggressive’, ‘intermediate’ or ‘docile...

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...

The behaviour of drifted Cape honeybee workers (Apis mellifera capensis): predisposition for social parasitism?

HEPBURN 2 0 Lehrstuhl für Verhaltensphysiologie und Soziobiologie, Zoologie II. Biozentrum der Universität Würzburg , Am Hubland, 97074 Würzburg , Germany 1 Department of Statistics, Rhodes University

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...