Nutritional constraints on brain evolution: Sodium and nitrogen limit brain size.
Brain size
Lepidoptera
evolutionary stoichiometry
mushroom bodies
nutrition
Journal
Evolution; international journal of organic evolution
ISSN: 1558-5646
Titre abrégé: Evolution
Pays: United States
ID NLM: 0373224
Informations de publication
Date de publication:
10 2020
10 2020
Historique:
received:
08
11
2019
revised:
07
07
2020
accepted:
25
07
2020
pubmed:
5
8
2020
medline:
11
6
2021
entrez:
5
8
2020
Statut:
ppublish
Résumé
Nutrition has been hypothesized as an important constraint on brain evolution. However, it is unclear whether the availability of specific nutrients or the difficulty of locating high-quality diets limits brain evolution, especially over long periods of time. We found that dietary nutrient content predicted brain size across 42 species of butterflies. Brain size, relative to body size, was associated with the sodium and nitrogen content of a species' diet. There was no evidence that host plant apparency (measured by plant height) was related to brain evolution. The timing of diet shifts across species varied from 3.5 to 90 million years ago, but nutritional constraints did not lessen over time as species adapted to a diet. Although nutrition was linked to overall brain volume, there was no evidence that nutrition was related to the relative size of individual brain regions. Laboratory rearing experiments confirmed the underlying assumption of most comparative studies that the majority of interspecific trait variation stems from genetically based differences across species rather than developmental plasticity. This study highlights a novel role of sodium and nitrogen in brain evolution, which is additionally interesting given current anthropogenic change in the availability of these nutrients.
Substances chimiques
Sodium, Dietary
0
Nitrogen
N762921K75
Banques de données
Dryad
['10.5061/dryad.h18931zhs']
Types de publication
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2304-2319Subventions
Organisme : Division of Integrative Organismal Systems
ID : 1354737
Organisme : Directorate for Biological Sciences
ID : 1306627
Informations de copyright
© 2020 The Authors. Evolution © 2020 The Society for the Study of Evolution.
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