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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

Population structure and classification of Apis cerana

Multivariate morphometric analyses of Apis cerana Fabricius, 1793 across its full geographical range were performed. Principal components plots did not reveal distinct morphoclusters. Further substructuring of the principal component plots could not initially be derived but only by introducing local labelling did it reveal six main morphoclusters. We apply geographically based...

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...