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The hypothesis that parasites and pathogens select for polyandry in eusocial Hymenoptera was tested, using the honey bee Apis mellifera and its microsporidian parasite Nosema apis. Five honey bee colonies with low and five with high worker genetic diversity were infected with N. apis spores. At 54-56 days after inoculation, parasite spores in the workers? midguts were counted to determine whether...
The authors investigated whether there is sperm competition in the honeybee queen's oviducts. 78 full-sister queens were artificially inseminated with equal volumes (0.75 mm3) of sperm. Each queen in the first group was inseminated with the sperm of one drone, in the second group with that of 6 brother drones, and in the third group with that of 6 unrelated drones. After 48 h the spermatozoa...
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