Abstract
Autogrooming responses of resistant and susceptible strains of honey bees were measured when bees were challenged by placing adult female tracheal mites on their thoraces. Marked, young adult workers of the two strains of bees were added to colonies in observation hives. We transferred a single, live, adult, female mite onto the mesoscutum of a marked bee, monitored the bee for seven minutes and then removed it and searched for the mite. Greater proportions of resistant bees autogroomed, and resistant bees made more grooming attempts. Bees of both strains had equal apparent grooming effectiveness; grooming bees lost approx. 75% of mites. Control-group bees (those only stroked with the brush used to transfer mites) of the two bee strains did not differ in any response parameter. Resistant bees may have a lower threshold for responding by autogrooming when stimulated by mites on their body. Apis mellifera / honey bees / Acarapis woodi / tracheal mites / genetic resistance / grooming behavior
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