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dc.contributor.author
Picasso, Mariana Beatriz Julieta
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dc.contributor.author
Mosto, María Clelia
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dc.contributor.author
Tudisca, Alejandro M.
dc.date.available
2023-12-26T11:18:31Z
dc.date.issued
2023-05
dc.identifier.citation
Picasso, Mariana Beatriz Julieta; Mosto, María Clelia; Tudisca, Alejandro M.; The feeding apparatus of Rhea americana (Aves, Palaeognathae): Jaw myology and ontogenetic allometry; Wiley-liss, div John Wiley & Sons Inc.; Journal of Morphology; 284; 7; 5-2023; 1-13
dc.identifier.issn
0362-2525
dc.identifier.uri
http://hdl.handle.net/11336/221315
dc.description.abstract
In birds, the jaw musculature is a crucial adaptive feature involved in feeding. The morphological traits and postnatal growth patterns of jaw muscles constitute a useful proxy to interpret feeding function and ecology. This study aims to describe the jaw muscles of Rhea americana and explore their postnatal growth pattern. A total of 20 specimens of R. americana representing four ontogenetic stages were studied. Jaw muscles were described, weighed and their proportions with respect to body mass were calculated. Linear regression analysis was used to characterize ontogenetic scaling patterns. The morphological patterns of jaw muscles were characterized by their simplicity: bellies with few or no subdivisions and similar to those described for other flightless paleognathous birds. In all stages, the muscles pterygoideus lateralis, depressor mandibulae, and pseudotemporalis had the greatest mass values. The proportion of total jaw muscle mass decreased with age from 0.22% in 1-month-old chicks to 0.05% in adults. Linear regression analysis showed that all muscles scaled with negative allometry with respect to body mass. The progressive decrease of jaw muscle mass relative to body mass in adults could be related to the generation of less force, which is in accordance with the herbivorous diet of adults. In contrast, the diet of rhea chicks includes a large proportion of insects thus, this greater muscle proportion could be associated with the ability to generate more force, thus providing better abilities to grasp and hold more mobile prey.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley-liss, div John Wiley & Sons Inc.
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
JAW MUSCLE MASS
dc.subject
POSTNATAL GROWTH PATTERN
dc.subject
RHEIDAE
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The feeding apparatus of Rhea americana (Aves, Palaeognathae): Jaw myology and ontogenetic allometry
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-12-22T11:33:12Z
dc.identifier.eissn
1097-4687
dc.journal.volume
284
dc.journal.number
7
dc.journal.pagination
1-13
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Picasso, Mariana Beatriz Julieta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Mosto, María Clelia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Tudisca, Alejandro M.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico Zoología Vertebrados; Argentina
dc.journal.title
Journal of Morphology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/jmor.21596
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/jmor.21596
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