Cited by 56Insect and Arachnid Ecology and BehaviorNeurobiology and Insect Physiology ResearchAnimal Behavior and Reproduction

Social complexity influences brain investment and neural operation costs in ants

Open access
Kamhi, J. Frances, Gronenberg, Wulfila, Robson, Simon K. A., Traniello, James F. A.·2016·Proceedings of the Royal Society B Biological Sciences

Abstract

The metabolic expense of producing and operating neural tissue required for adaptive behaviour is considered a significant selective force in brain evolution. In primates, brain size correlates positively with group size, presumably owing to the greater cognitive demands of complex social relationships in large societies. Social complexity in eusocial insects is also associated with large groups, as well as collective intelligence and division of labour among sterile workers. However, superorganism phenotypes may lower cognitive demands on behaviourally specialized workers resulting in selection for decreased brain size and/or energetic costs of brain metabolism. To test this hypothesis, we compared brain investment patterns and cytochrome oxidase (COX) activity, a proxy for ATP usage, in two ant species contrasting in social organization. Socially complex Oecophylla smaragdina workers had larger brain size and relative investment in the mushroom bodies (MBs)-higher order sensory processing compartments-than the more socially basic Formica subsericea workers. Oecophylla smaragdina workers, however, had reduced COX activity in the MBs. Our results suggest that as in primates, ant group size is associated with large brain size. The elevated costs of investment in metabolically expensive brain tissue in the socially complex O. smaragdina, however, appear to be offset by decreased energetic costs.

Integrity signals

Registry

Crossref · 10.1098/rspb.2016.1949

Cites

91 of 91 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Weaver ant worker mushroom bodies have reduced COX activity.

    “Weaver ant worker mushroom bodies have reduced COX activity.”
  • Increased social complexity in weaver ants was associated with larger mushroom bodies, implying greater needs for higher-order information processing.

    “Increased social complexity in weaver ants-reflected in division of labor by worker physical castes, large colony size, and remarkable decentralized group action including cooperative nest building-was associated with larger mushroom bodies, implying greater needs for higher-order information processing.”
  • Insect colony organization may involve selection for either smaller, neurally differentiated worker brains or larger brains able to metabolically offset increased production and operation costs.

    “insect colony organization may involve selection for either smaller, neurally differentiated worker brains (Lihoreau et al., 2012;Riveros et al., 2012;O'Donnell et al., 2015;Feinerman and Traniello, 2016) or larger brains (Wehner et al., 2007) able to metabolically offset increased production and operation costs (Kamhi et al., 2016).”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Kamhi, J. F., Gronenberg, W., Robson, S. K. A., & Traniello, J. F. A.
Affiliations
  • Boston University (US)
  • University of Arizona (US)
  • James Cook University (AU)
Corresponding author
Kamhi, J. Frances
Venue
Proceedings of the Royal Society B Biological Sciences
Published
2016-10-26
Volume
283
Issue
1841
Pages
20161949
ISSN
  • 0080-4649 (ISSN-L)
  • 0962-8452
  • 1471-2954
OpenAlex
W2538465829
Cited by
56
References
91
Citations by year
2026: 4 · 2025: 3 · 2024: 4 · 2023: 4 · 2022: 11 · 2021: 11 · 2020: 2 · 2019: 8 · 2018: 5 · 2017: 4
FWCI
4.58
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the Royal Society B Biological Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UA Campus Repository (The University of Arizona) (acceptedVersion)
  • ResearchOnline at James Cook University (James Cook University) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • National Science Foundation (EAPSI - 1209967)
  • Directorate for Biological Sciences (IOB-0725013, IOS-1354291)
  • Australian Research Council (Discovery grant 1093553)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Insect and Arachnid Ecology and Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
Keywords
social complexity, brain size, cytochrome oxidase activity, Oecophylla smaragdina, ants, eusocial insects, mushroom body, group size, superorganism, brain evolution, collective intelligence, division of labor
MeSH terms
Animals, Ants, Brain, Cognition, Electron Transport Complex IV, Energy Metabolism, Organ Size, Social Behavior, Mushroom Bodies

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review