Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.

Birds still share many traits with their dinosaur ancestors, making them the best living group to reconstruct certain aspects of non-avian theropod biology. Bipedal, digitigrade locomotion and parasagittal hindlimb movement are some of those inherited traits. Living birds, however, maintain an unusu...

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Autores principales:	Bruno Grossi, José Iriarte-Díaz, Omar Larach, Mauricio Canals, Rodrigo A Vásquez
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/019da2286d7646a3a196d45ea5ade5d7
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id	oai:doaj.org-article:019da2286d7646a3a196d45ea5ade5d7
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spelling	oai:doaj.org-article:019da2286d7646a3a196d45ea5ade5d72021-11-18T08:33:32ZWalking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.1932-620310.1371/journal.pone.0088458https://doaj.org/article/019da2286d7646a3a196d45ea5ade5d72014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24505491/?tool=EBIhttps://doaj.org/toc/1932-6203Birds still share many traits with their dinosaur ancestors, making them the best living group to reconstruct certain aspects of non-avian theropod biology. Bipedal, digitigrade locomotion and parasagittal hindlimb movement are some of those inherited traits. Living birds, however, maintain an unusually crouched hindlimb posture and locomotion powered by knee flexion, in contrast to the inferred primitive condition of non-avian theropods: more upright posture and limb movement powered by femur retraction. Such functional differences, which are associated with a gradual, anterior shift of the centre of mass in theropods along the bird line, make the use of extant birds to study non-avian theropod locomotion problematic. Here we show that, by experimentally manipulating the location of the centre of mass in living birds, it is possible to recreate limb posture and kinematics inferred for extinct bipedal dinosaurs. Chickens raised wearing artificial tails, and consequently with more posteriorly located centre of mass, showed a more vertical orientation of the femur during standing and increased femoral displacement during locomotion. Our results support the hypothesis that gradual changes in the location of the centre of mass resulted in more crouched hindlimb postures and a shift from hip-driven to knee-driven limb movements through theropod evolution. This study suggests that, through careful experimental manipulations during the growth phase of ontogeny, extant birds can potentially be used to gain important insights into previously unexplored aspects of bipedal non-avian theropod locomotion.Bruno GrossiJosé Iriarte-DíazOmar LarachMauricio CanalsRodrigo A VásquezPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 2, p e88458 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bruno Grossi José Iriarte-Díaz Omar Larach Mauricio Canals Rodrigo A Vásquez Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
description	Birds still share many traits with their dinosaur ancestors, making them the best living group to reconstruct certain aspects of non-avian theropod biology. Bipedal, digitigrade locomotion and parasagittal hindlimb movement are some of those inherited traits. Living birds, however, maintain an unusually crouched hindlimb posture and locomotion powered by knee flexion, in contrast to the inferred primitive condition of non-avian theropods: more upright posture and limb movement powered by femur retraction. Such functional differences, which are associated with a gradual, anterior shift of the centre of mass in theropods along the bird line, make the use of extant birds to study non-avian theropod locomotion problematic. Here we show that, by experimentally manipulating the location of the centre of mass in living birds, it is possible to recreate limb posture and kinematics inferred for extinct bipedal dinosaurs. Chickens raised wearing artificial tails, and consequently with more posteriorly located centre of mass, showed a more vertical orientation of the femur during standing and increased femoral displacement during locomotion. Our results support the hypothesis that gradual changes in the location of the centre of mass resulted in more crouched hindlimb postures and a shift from hip-driven to knee-driven limb movements through theropod evolution. This study suggests that, through careful experimental manipulations during the growth phase of ontogeny, extant birds can potentially be used to gain important insights into previously unexplored aspects of bipedal non-avian theropod locomotion.
format	article
author	Bruno Grossi José Iriarte-Díaz Omar Larach Mauricio Canals Rodrigo A Vásquez
author_facet	Bruno Grossi José Iriarte-Díaz Omar Larach Mauricio Canals Rodrigo A Vásquez
author_sort	Bruno Grossi
title	Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
title_short	Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
title_full	Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
title_fullStr	Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
title_full_unstemmed	Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
title_sort	walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/019da2286d7646a3a196d45ea5ade5d7
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Walking like dinosaurs: chickens with artificial tails provide clues about non-avian theropod locomotion.

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