Cited by 259Morphological variations and asymmetryAnimal Behavior and ReproductionAvian ecology and behavior

The shapes of bird beaks are highly controlled by nondietary factors

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Bright, Jen A., Marugán-Lobón, Jesús, Cobb, Samuel N., Rayfield, Emily J.·2016·Proceedings of the National Academy of Sciences

Abstract

Significance: We show that beak and skull shapes in birds of prey (“raptors”) are strongly coupled and largely controlled by size. This relationship means that, rather than being able to respond independently to natural selection, beak shapes are highly constrained to evolve in a particular way. The main aspects of shape variation seem to correspond with specific genes active during development. Because raptors are not each other’s closest relatives, similar shape constraints may therefore have been present in the ancestors of all modern songbirds, including Darwin’s finches, the classic example of explosive evolution in birds. If this hypothesis is true, then such classic examples may be unusual, needing first to break a genetic lock before their beaks could evolve new shapes.

Integrity signals

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Crossref · 10.1073/pnas.1602683113

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49 of 49 references verified0 citation errors · 0 not checkable

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  • Previous analyses that found the avian cranium to be highly integrated were restricted to smaller clades or excluded large portions of the skull.

    “This contrasts with previous analyses that have found the avian cranium to be highly integrated. However, these previous analyses have been restricted to analyzing smaller clades (10, 12) or have excluded large portions of the skull (9).”

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Authors
Bright, J. A., Marugán-Lobón, J., Cobb, S. N., & Rayfield, E. J.
Affiliations
  • University of Bristol (GB)
  • Unidad de Paleontología, Departamento de Biología, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain;
  • University of York (GB)
Corresponding author
Bright, Jen A.
Venue
Proceedings of the National Academy of Sciences
Published
2016-04-28
Volume
113
Issue
19
Pages
5352-5357
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2345261486
Cited by
258
References
49
Citations by year
2026: 16 · 2025: 21 · 2024: 24 · 2023: 37 · 2022: 28 · 2021: 34 · 2020: 19 · 2019: 39 · 2018: 17 · 2017: 19 · 2016: 3
FWCI
37.35
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • Repository@Hull (Worktribe) (University of Hull) (acceptedVersion, other-oa)
  • Bristol Research (University of Bristol) (acceptedVersion, cc-by-nc)
  • Repository@Hull (Worktribe) (University of Hull) (submittedVersion, cc-by)
  • Digital Commons - University of South Florida (University of South Florida) (submittedVersion)
Funders
Biotechnology and Biological Sciences Research Council (BB/I011668/1, BB/I011714/1)
Topics
  • Physical Sciences › Mathematics › Geometry and Topology › Morphological variations and asymmetry
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
  • Physical Sciences › Environmental Science › Ecology › Avian ecology and behavior
Keywords
raptors, body size, morphological integration, developmental constraints, regulatory genes, dietary adaptation, feeding ecology, morphological evolution, landbirds
MeSH terms
Animals, Beak, Diet, Biological Evolution, Feeding Behavior, Morphogenesis, Organ Size, Species Specificity, Raptors, Body Size

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