Ontogenetic variations of the head of Aptenodytes forsteri (Aves, Sphenisciformes): muscular and skull morphology

The emperor penguin (Aptenodytes forsteri) is the largest extant penguin among living species breeding in winter, at Antarctic high latitudes. Despite several studies made on this species, musculature and skeletal anatomy are barely known, especially in non-adult specimens. To address this shortfall...

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Bibliographic Details
Published in:Polar Biology
Main Authors: Sosa, María Alejandra, Acosta Hospitaleche, Carolina Ileana Alicia
Format: Article in Journal/Newspaper
Language:English
Published: Springer
Subjects:
PINGUINOS
ONTOGENIA
MIOLOGIA
OSTEOLOGIA
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
Antarctic
Argentina
Alicia
Acosta
Antarc*
Aptenodytes forsteri
Polar Biology
Online Access:http://hdl.handle.net/11336/56553
Description
Summary:The emperor penguin (Aptenodytes forsteri) is the largest extant penguin among living species breeding in winter, at Antarctic high latitudes. Despite several studies made on this species, musculature and skeletal anatomy are barely known, especially in non-adult specimens. To address this shortfall, dissections and comparative descriptions were made on crania and mandibles of individuals of different ontogenetic stages: chicks, juveniles, and adults. The results presented here show significant differences in musculature between the age groups, and the proportions between bill and cranium also change along postnatal ontogeny. Fil: Sosa, María Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina 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; Argentina

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