Brain composition and olfactory learning in honey bees

Wulfila Gronenberg, Margaret J. Couvillon

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Correlations between brain or brain component size and behavioral measures are frequently studied by comparing different animal species, which sometimes introduces variables that complicate interpretation in terms of brain function. Here, we have analyzed the brain composition of honey bees (Apis mellifera) that have been individually tested in an olfactory learning paradigm. We found that the total brain size correlated with the bees' learning performance. Among different brain components, only the mushroom body, a structure known to be involved in learning and memory, showed a positive correlation with learning performance. In contrast, visual neuropils were relatively smaller in bees that performed better in the olfactory learning task, suggesting modality-specific behavioral specialization of individual bees. This idea is also supported by inter-individual differences in brain composition. Some slight yet statistically significant differences in the brain composition of European and Africanized honey bees are reported. Larger bees had larger brains, and by comparing brains of different sizes, we report isometric correlations for all brain components except for a small structure, the central body.

Original languageEnglish (US)
Pages (from-to)435-443
Number of pages9
JournalNeurobiology of Learning and Memory
Volume93
Issue number3
DOIs
StatePublished - Mar 1 2010

Keywords

  • Africanized bees
  • Brain size
  • Mushroom body

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience
  • Behavioral Neuroscience

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