Montgomery, SH;
Merrill, RM;
Ott, SR;
(2016)
Brain composition in Heliconius butterflies, post-eclosion growth and experience-dependent neuropil plasticity.
Journal of Comparative Neurology
, 524
(9)
pp. 1747-1769.
10.1002/cne.23993.
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Abstract
Behavioral and sensory adaptations are often reflected in the differential expansion of brain components. These volumetric differences represent changes in cell number, size and/or connectivity, which may denote changes in the functional and evolutionary relationships between different brain regions, and between brain composition and behavioral ecology. Here, we describe the brain composition of two species of Heliconius butterflies, a long-standing study system for investigating ecological adaptation and speciation. We confirm a previous report of a striking volumetric expansion of the mushroom body, and explore patterns of differential post-eclosion and experience-dependent plasticity between different brain regions. This analysis uncovers age- and experience-dependent post-eclosion mushroom body growth comparable to that in foraging Hymenoptera, but also identifies plasticity in several other neuropils. An interspecific analysis indicates that Heliconius display a remarkably large investment in mushroom bodies for a lepidopteran, and indeed rank highly compared to other insects. Our analyses lay the foundation for future comparative and experimental analyses that will establish Heliconius as a valuable case study in evolutionary neurobiology.
| Type: | Article |
|---|---|
| Title: | Brain composition in Heliconius butterflies, post-eclosion growth and experience-dependent neuropil plasticity |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/cne.23993 |
| Publisher version: | http://dx.doi.org/10.1002/cne.23993 |
| Language: | English |
| Additional information: | This is the peer reviewed version of the following article: Montgomery, S. H., Merrill, R. M. and Ott, S. R. (2016), Brain composition in Heliconius butterflies, posteclosion growth and experience-dependent neuropil plasticity. J. Comp. Neurol., 524: 1747–1769, which has been published in final form at doi:10.1002/cne.23993. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
| Keywords: | Heliconius, Lepidoptera, adaptive brain evolution, comparative neuroanatomy, mushroom bodies, plasticity |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1477161 |
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