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Shared developmental programme strongly constrains beak shape diversity in songbirds

Author

Listed:
  • Joerg A. Fritz

    (School of Engineering and Applied Sciences and Kavli Institute for Bionano Science and Technology, Harvard University)

  • Joseph Brancale

    (Harvard University)

  • Masayoshi Tokita

    (Harvard University)

  • Kevin J. Burns

    (San Diego State University)

  • M. Brent Hawkins

    (Harvard University)

  • Arhat Abzhanov

    (Harvard University)

  • Michael P. Brenner

    (School of Engineering and Applied Sciences and Kavli Institute for Bionano Science and Technology, Harvard University)

Abstract

The striking diversity of bird beak shapes is an outcome of natural selection, yet the relative importance of the limitations imposed by the process of beak development on generating such variation is unclear. Untangling these factors requires mapping developmental mechanisms over a phylogeny far exceeding model systems studied thus far. We address this issue with a comparative morphometric analysis of beak shape in a diverse group of songbirds. Here we show that the dynamics of the proliferative growth zone must follow restrictive rules to explain the observed variation, with beak diversity constrained to a three parameter family of shapes, parameterized by length, depth and the degree of shear. We experimentally verify these predictions by analysing cell proliferation in the developing embryonic beaks of the zebra finch. Our findings indicate that beak shape variability in many songbirds is strongly constrained by shared properties of the developmental programme controlling the growth zone.

Suggested Citation

  • Joerg A. Fritz & Joseph Brancale & Masayoshi Tokita & Kevin J. Burns & M. Brent Hawkins & Arhat Abzhanov & Michael P. Brenner, 2014. "Shared developmental programme strongly constrains beak shape diversity in songbirds," Nature Communications, Nature, vol. 5(1), pages 1-9, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4700
    DOI: 10.1038/ncomms4700
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    Cited by:

    1. Yoshihiro Morishita & Sang-Woo Lee & Takayuki Suzuki & Hitoshi Yokoyama & Yasuhiro Kamei & Koji Tamura & Aiko Kawasumi-Kita, 2023. "An archetype and scaling of developmental tissue dynamics across species," Nature Communications, Nature, vol. 14(1), pages 1-15, December.
    2. J Y Wong & K Y Karen Chan & Benny K K Chan, 2018. "Phylogenetic, ecological and biomechanical constraints on larval form: A comparative morphological analysis of barnacle nauplii," PLOS ONE, Public Library of Science, vol. 13(11), pages 1-16, November.

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