Brain allometry in bumblebee and honey bee workers

Stefanie Mares, Lesley Ash, Wulfila Gronenberg

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

Within a particular animal taxon, larger bodied species generally have larger brains. Increased brain size usually correlates with increased behavioral repertoires and often with superior cognitive abilities. Bumblebees are eusocial insects that show pronounced size polymorphism among workers, whereas in honey bees size variation is much less pronounced. Recent studies suggest that within a given colony, large bumblebee workers are more efficient foragers and are better learners than their smaller sisters. Here we examine the allometric relationship between brain and body size of worker bumblebees and honey bees. We find that larger bees have larger brains and that most brain components show a similar size increase as the overall brain. One particular brain structure, the central body, is relatively smaller in large bumblebees compared to small bees. The same is true for the mushroom body lobes, whereas the mushroom body calyces, which receive sensory input, are not reduced in larger bumblebees or honey bees. Honey bees have relatively smaller brains, as well as smaller mushroom bodies, than bumblebee workers. We discuss why brain or mushroom body size does not necessarily correlate with the degree of a species' social organization.

Original languageEnglish (US)
Pages (from-to)50-61
Number of pages12
JournalBrain, Behavior and Evolution
Volume66
Issue number1
DOIs
StatePublished - May 2005

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worker honey bees
Honey
allometry
Bees
honey
Bombus
bee
brain
Mushroom Bodies
mushroom bodies
Brain
mushroom
honey bees
Body Size
Apoidea
body size
social organization
social structure
calyx
polymorphism

Keywords

  • Brain size
  • Polymorphism
  • Social insects
  • Task specialization

ASJC Scopus subject areas

  • Neuroscience(all)
  • Ecology, Evolution, Behavior and Systematics

Cite this

Brain allometry in bumblebee and honey bee workers. / Mares, Stefanie; Ash, Lesley; Gronenberg, Wulfila.

In: Brain, Behavior and Evolution, Vol. 66, No. 1, 05.2005, p. 50-61.

Research output: Contribution to journalArticle

Mares, Stefanie ; Ash, Lesley ; Gronenberg, Wulfila. / Brain allometry in bumblebee and honey bee workers. In: Brain, Behavior and Evolution. 2005 ; Vol. 66, No. 1. pp. 50-61.
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