Evidence map›Paper›PMID 30065283›Full record

ArticleNature communications2018

Predictable evolution towards larger brains in birds colonizing oceanic islands.

Ferran Sayol, Philip A Downing, Andrew N Iwaniuk, Joan Maspons, Daniel Sol

Abstract read
In one paragraph

Article in Nature communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
–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

31 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. Proximate mechanisms underlying the coevolution of diet quality and relative brain size in primates.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Parental provisioning drives brain size in birds.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article
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

5 authors.

Ferran SayolCREAF, Bellaterra (Cerdanyola del Vallès), 08193, Barcelona, Catalonia, Spain. f.sayol@creaf.uab.cat.ORCID http://orcid.org/0000-0003-3540-7487
Philip A DowningDepartment of Biology, Molecular Ecology and Evolution Laboratory, Lund University, 223 62, Lund, Sweden.ORCID http://orcid.org/0000-0002-5286-3153
Andrew N IwaniukDepartment of Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, T1K 3M4, Canada.ORCID http://orcid.org/0000-0001-9273-3655
Joan MasponsCREAF, Bellaterra (Cerdanyola del Vallès), 08193, Barcelona, Catalonia, Spain.ORCID http://orcid.org/0000-0003-2286-8727
Daniel SolCREAF, Bellaterra (Cerdanyola del Vallès), 08193, Barcelona, Catalonia, Spain. d.sol@creaf.uab.cat.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Theory and evidence suggest that some selective pressures are more common on islands than in adjacent mainland habitats, leading evolution to follow predictable trends. The existence of predictable evolutionary trends has nonetheless been difficult to demonstrate, mainly because of the challenge of separating in situ evolution from sorting processes derived from colonization events. Here we use brain size measurements of >1900 avian species to reveal the existence of one such trend: increased brain size in island dwellers. Based on sister-taxa comparisons and phylogenetic ancestral trait estimations, we show that species living on islands have relatively larger brains than their mainland relatives and that these differences mainly reflect in situ evolution rather than varying colonization success. Our findings reinforce the view that in some instances evolution may be predictable, and yield insight into why some animals evolve larger brains despite substantial energetic and developmental costs.

Indexed as

Biological EvolutionEcosystemAnimalsBirdsBrainIslandsMarkov ChainsMonte Carlo MethodOrgan SizePhylogenySpecies Specificity

Identifiers

PMID30065283
PMCPMC6068123

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.