Relationship between brain plasticity, learning and foraging performance in honey bees

Amélie Cabirol, Alex J. Cope, Andrew B. Barron, Jean Marc Devaud

Research output: Contribution to journalArticle

Abstract

Brain structure and learning capacities both vary with experience, but the mechanistic link between them is unclear. Here, we investigated whether experience-dependent variability in learning performance can be explained by neuroplasticity in foraging honey bees. The mushroom bodies (MBs) are a brain center necessary for ambiguous olfactory learning tasks such as reversal learning. Using radio frequency identification technology, we assessed the effects of natural variation in foraging activity, and the age when first foraging, on both performance in reversal learning and on synaptic connectivity in the MBs. We found that reversal learning performance improved at foraging onset and could decline with greater foraging experience. If bees started foraging before the normal age, as a result of a stress applied to the colony, the decline in learning performance with foraging experience was more severe. Analyses of brain structure in the same bees showed that the total number of synaptic boutons at the MB input decreased when bees started foraging, and then increased with greater foraging intensity. At foraging onset MB structure is therefore optimized for bees to update learned information, but optimization of MB connectivity deteriorates with foraging effort. In a computational model of the MBs sparser coding of information at the MB input improved reversal learning performance. We propose, therefore, a plausible mechanistic relationship between experience, neuroplasticity, and cognitive performance in a natural and ecological context.

LanguageEnglish
Article numbere0196749
Pages1-18
Number of pages18
JournalPLoS ONE
Volume13
Issue number4
DOIs
StatePublished - 30 Apr 2018

Fingerprint

Mushroom Bodies
Honey
Bees
honey bees
Plasticity
mushroom bodies
Brain
Reversal Learning
learning
Learning
foraging
brain
Neuronal Plasticity
Radio frequency identification (RFID)
Apoidea
Radio Frequency Identification Device
Presynaptic Terminals
radio frequency identification
Technology
cognition

Bibliographical note

Copyright the Author(s) 2018. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this

Cabirol, Amélie ; Cope, Alex J. ; Barron, Andrew B. ; Devaud, Jean Marc. / Relationship between brain plasticity, learning and foraging performance in honey bees. In: PLoS ONE. 2018 ; Vol. 13, No. 4. pp. 1-18
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Relationship between brain plasticity, learning and foraging performance in honey bees. / Cabirol, Amélie; Cope, Alex J.; Barron, Andrew B.; Devaud, Jean Marc.

In: PLoS ONE, Vol. 13, No. 4, e0196749, 30.04.2018, p. 1-18.

Research output: Contribution to journalArticle

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Cabirol A, Cope AJ, Barron AB, Devaud JM. Relationship between brain plasticity, learning and foraging performance in honey bees. PLoS ONE. 2018 Apr 30;13(4):1-18. e0196749. Available from, DOI: 10.1371/journal.pone.0196749