ArticleProceedings. Biological sciences2023
Beak morphometry and morphogenesis across avian radiations.
Article in Proceedings. Biological sciences, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Evolvability in vertebrate segmentation.Seminars in cell & developmental biology · 2025Review
- Article
- Cellular, Molecular, and Genetic Mechanisms of Avian Beak Development and Evolution.Annual review of genetics · 2024Review
- Morphogens in the evolution of size, shape and patterning.Development (Cambridge, England) · 2024Review
- Beak morphometry and morphogenesis across avian radiations.Proceedings. Biological sciences · 2023Article
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Authors and funding
6 authors at 4 institutions in 3 countries.
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No grant is acknowledged in the PubMed record.
Abstract
Adaptive avian radiations associated with the diversification of bird beaks into a multitude of forms enabling different functions are exemplified by Darwin's finches and Hawaiian honeycreepers. To elucidate the nature of these radiations, we quantified beak shape and skull shape using a variety of geometric measures that allowed us to collapse the variability of beak shape into a minimal set of geometric parameters. Furthermore, we find that just two measures of beak shape-the ratio of the width to length and the normalized sharpening rate (increase in the transverse beak curvature near the tip relative to that at the base of the beak)-are strongly correlated with diet. Finally, by considering how transverse sections to the beak centreline evolve with distance from the tip, we show that a simple geometry-driven growth law termed 'modified mean curvature flow' captures the beak shapes of Darwin's finches and Hawaiian honeycreepers. A surprising consequence of the simple growth law is that beak shapes that are not allowed based on the developmental programme of the beak are also not observed in nature, suggesting a link between evolutionary morphology and development in terms of growth-driven developmental constraints.
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