Evidence map›Paper›PMID 30404883›Full record

ArticleProceedings. Biological sciences2018

Intraspecific brain size variation between coexisting sunfish ecotypes.

Caleb J Axelrod, Frédéric Laberge, Beren W Robinson

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed.

  1. Review
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  5. Evolution of Plasticity in Brain Morphology.Brain, behavior and evolution · 2025
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Caleb J AxelrodDepartment of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1 caxelrod@uoguelph.ca.ORCID 0000-0002-6130-0168
Frédéric LabergeDepartment of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1.ORCID 0000-0002-2469-9720
Beren W RobinsonDepartment of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1.ORCID 0000-0003-2868-5411

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Variation in spatial complexity and foraging requirements between habitats can impose different cognitive demands on animals that may influence brain size. However, the relationship between ecologically related cognitive performance and brain size is not well established. We test whether variation in relative brain size and brain region size is associated with habitat use within a population of pumpkinseed sunfish composed of different ecotypes that inhabit either the structurally complex shoreline littoral habitat or simpler open-water pelagic habitat. Sunfish using the littoral habitat have on average 8.3% larger brains than those using the pelagic habitat. We found little difference in the proportional sizes of five brain regions between ecotypes. The results suggest that cognitive demands on sunfish may be reduced in the pelagic habitat given no habitat-specific differences in body condition. They also suggest that either a short divergence time or physiological processes may constrain changes to concerted, global modifications of brain size between sunfish ecotypes.

Indexed as

Adaptation, BiologicalEcotypeAnimalsBrainEcosystemOrgan SizePerciformesadaptive divergencebrain sizecognitive ecologyhabitatplasticitysunfish

Identifiers

PMID30404883
PMCPMC6235049

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.