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Guzmán-Novoa, E., Hunt, G.J., Uribe-Rubio, J.L., Smith, C. and Arechavaleta-Velasco, M.E. (2002) Confirmation of QTL effects and evidence of genetic dominance of honeybee defensive behavior: Results of colony and individual behavioral assays. Behavioral Genetics, 32, 95-102. doi:10.1023/A:1015245605670

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• TITLE: Genotype and task influence stinging response thresholds of honeybee (Apis mellifera L.) workers of African and European descent

  AUTHORS: Jose L. Uribe-Rubio, Tatiana Petukhova, Ernesto Guzman-Novoa

  KEYWORDS: Apis mellifera; Africanized Honeybees; Genotypic Effects; Defensive Behavior; Response Thresholds; Division of Labor

  JOURNAL NAME: Open Journal of Ecology, Vol.3 No.4, July 23, 2013

  ABSTRACT: The stinging response thresholds of individual European and Africanized worker honeybees (Apis mellifera L.) were analyzed. Workers of each genotype performing defense (guard and soldier bees) and non-defense (nest and forager bees) associated tasks were collected and exposed to an electric stimulus of 0.5 mA, and the time they took to sting a leather substrate was recorded. Africanized bees had significant lower thresholds of response than European bees. Guards and soldiers were faster to sting than nest and forager bees for the Africanized genotype, whereas for the European genotype, guards stung significantly faster than bees of the other three task groups. This is the first study that shows that individual bees specialized in two defensive tasks also have a lower response threshold for stinging. Our results fit a model of division of labor based on differences in response thresholds to stimuli among workers of different genotypes and task groups.