title: Africanized honeybees are slower learners than their European counterparts.
abstract: Does cognitive ability always correlate with a positive fitness consequence? Previous research in both vertebrates and invertebrates provides mixed results. Here, we compare the learning and memory abilities of Africanized honeybees (Apis mellifera scutellata hybrid) and European honeybees (Apis mellifera ligustica). The range of the Africanized honeybee continues to expand, superseding the European honeybee, which led us to hypothesize that they might possess greater cognitive capabilities as revealed by a classical conditioning assay. Surprisingly, we found that fewer Africanized honeybees learn to associate an odor with a reward. Additionally, fewer Africanized honeybees remembered the association a day later. While Africanized honeybees are replacing European honeybees, our results show that they do so despite displaying a relatively poorer performance on an associative learning paradigm.
authors.affiliation: Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. mjcouv@email.arizona.edu
authors.forename: Margaret J
authors.initials: MJ
authors.lastname: Couvillon
authors.forename: Gloria
authors.initials: G
authors.lastname: DeGrandi-Hoffman
authors.forename: Wulfila
authors.initials: W
authors.lastname: Gronenberg
mesh_terms: D000349:Africa; D000818:Animals; D001245:Association Learning; D001516:Bees / Q000033:anatomy & histology / Q000502:physiology*; D003071:Cognition; D017753:Ecosystem; D005060:Europe; D005247:Feeding Behavior; D007858:Learning / Q000502:physiology*; D009812:Odorants; D012018:Reflex / Q000502:physiology; D012201:Reward; D012919:Social Behavior