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dc.contributor.author
Sosa, María Alejandra
dc.contributor.author
Acosta Hospitaleche, Carolina Ileana Alicia
dc.date.available
2023-02-14T10:48:34Z
dc.date.issued
2022-02
dc.identifier.citation
Sosa, María Alejandra; Acosta Hospitaleche, Carolina Ileana Alicia; Postnatal ontogeny of the spine of the Emperor Penguin Aptenodytes forsteri (Aves, Sphenisciformes) and modularity of the neck; Springer; Polar Biology; 45; 2; 2-2022; 309-329
dc.identifier.issn
0722-4060
dc.identifier.uri
http://hdl.handle.net/11336/187837
dc.description.abstract
The Emperor Penguin (Aptenodytes forsteri), the largest extant penguin, inhabits exclusively in Antarctica. Little is known about the spine of this species; this work presents a description of the vertebral column of an adult of A. forsteri, compared with specimens from different ontogenetic stages (chick, fledgling, and juvenile). We also analyze the regionalization of the spine with a principal component analysis (PCA), and the modularity with an elliptical Fourier analysis, performing a PCA, followed by a linear discriminant analysis on the PC scores. Our results show that the vertebrae are completely ossified in adults, while the suture lines between the different elements are visible in the previous stages and some structures remain cartilaginous. A total of 42/43 vertebrae were counted (13 cervicals, 2 cervicothoracics, 6/7 thoracics, 13 synsacrals, and 8 caudals), and an extra vertebra appears in the thoracic region of one specimen. These regions are already differentiated in fledglings, but not in chicks. Six modules associated with the S-shape of the adult neck were recognized and are represented by different numbers of vertebrae: module 1 (C1), module 2 (C2), module 3 (C3–5), module 4 (C6), module 5 (C7–9) and module 6 (C10–13). Differences in the vertebral configuration in modules 5 and 6 of previous stages were found, where cervical 10 is part of module 5 due to the absence of the processus ventralis corporis.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CERVICAL MODULES
dc.subject
OSTEOLOGY
dc.subject
VERTEBRAL COLUMN
dc.subject
VERTEBRAL REGIONS
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Postnatal ontogeny of the spine of the Emperor Penguin Aptenodytes forsteri (Aves, Sphenisciformes) and modularity of the neck
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-02-09T15:14:38Z
dc.journal.volume
45
dc.journal.number
2
dc.journal.pagination
309-329
dc.journal.pais
Alemania
dc.description.fil
Fil: Sosa, María Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
dc.description.fil
Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.journal.title
Polar Biology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/10.1007/s00300-021-02986-2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00300-021-02986-2
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