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Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds

The evolution of flight in birds involves (i) decoupling of the primitive mode of quadrupedal locomotor coordination, with a new synchronized flapping motion of the wings while conserving alternating leg movements, and (ii) reduction of wing digits and loss of functional claws. Our observations show...

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Autores principales: Abourachid, Anick, Herrel, Anthony, Decamps, Thierry, Pages, Fanny, Fabre, Anne-Claire, Van Hoorebeke, Luc, Adriaens, Dominique, Garcia Amado, Maria Alexandra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6530998/
https://www.ncbi.nlm.nih.gov/pubmed/31131317
http://dx.doi.org/10.1126/sciadv.aat0787
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author Abourachid, Anick
Herrel, Anthony
Decamps, Thierry
Pages, Fanny
Fabre, Anne-Claire
Van Hoorebeke, Luc
Adriaens, Dominique
Garcia Amado, Maria Alexandra
author_facet Abourachid, Anick
Herrel, Anthony
Decamps, Thierry
Pages, Fanny
Fabre, Anne-Claire
Van Hoorebeke, Luc
Adriaens, Dominique
Garcia Amado, Maria Alexandra
author_sort Abourachid, Anick
collection PubMed
description The evolution of flight in birds involves (i) decoupling of the primitive mode of quadrupedal locomotor coordination, with a new synchronized flapping motion of the wings while conserving alternating leg movements, and (ii) reduction of wing digits and loss of functional claws. Our observations show that hoatzin nestlings move with alternated walking coordination of the four limbs using the mobile claws on their wings to anchor themselves to the substrate. When swimming, hoatzin nestlings use a coordinated motion of the four limbs involving synchronous or alternated movements of the wings, indicating a versatile motor pattern. Last, the proportions of claws and phalanges in juvenile hoatzin are radically divergent from those in adults, yet strikingly similar to those of Archaeopteryx. The locomotor plasticity observed in the hoatzin suggests that transitional forms that retained claws on the wings could have also used them for locomotion.
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spelling pubmed-65309982019-05-26 Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds Abourachid, Anick Herrel, Anthony Decamps, Thierry Pages, Fanny Fabre, Anne-Claire Van Hoorebeke, Luc Adriaens, Dominique Garcia Amado, Maria Alexandra Sci Adv Research Articles The evolution of flight in birds involves (i) decoupling of the primitive mode of quadrupedal locomotor coordination, with a new synchronized flapping motion of the wings while conserving alternating leg movements, and (ii) reduction of wing digits and loss of functional claws. Our observations show that hoatzin nestlings move with alternated walking coordination of the four limbs using the mobile claws on their wings to anchor themselves to the substrate. When swimming, hoatzin nestlings use a coordinated motion of the four limbs involving synchronous or alternated movements of the wings, indicating a versatile motor pattern. Last, the proportions of claws and phalanges in juvenile hoatzin are radically divergent from those in adults, yet strikingly similar to those of Archaeopteryx. The locomotor plasticity observed in the hoatzin suggests that transitional forms that retained claws on the wings could have also used them for locomotion. American Association for the Advancement of Science 2019-05-22 /pmc/articles/PMC6530998/ /pubmed/31131317 http://dx.doi.org/10.1126/sciadv.aat0787 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Abourachid, Anick
Herrel, Anthony
Decamps, Thierry
Pages, Fanny
Fabre, Anne-Claire
Van Hoorebeke, Luc
Adriaens, Dominique
Garcia Amado, Maria Alexandra
Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title_full Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title_fullStr Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title_full_unstemmed Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title_short Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds
title_sort hoatzin nestling locomotion: acquisition of quadrupedal limb coordination in birds
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6530998/
https://www.ncbi.nlm.nih.gov/pubmed/31131317
http://dx.doi.org/10.1126/sciadv.aat0787
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