INVESTIGADORES
ABDALA Virginia Sara Luz
artículos
Título:
Functional Indices and Postnatal Ontogeny of Long Bones of the Forelimb in the Sigmodontine Rodents (Rodentia: Cricetidae)
Autor/es:
CARRIZO, LUZ VALERIA; TULLI, MARÍA JOSÉ; ABDALA, VIRGINIA
Revista:
JOURNAL OF MAMMALIAN EVOLUTION
Editorial:
SPRINGER
Referencias:
Año: 2020
ISSN:
1064-7554
Resumen:
The adaptations for a particular locomotor type (e.g., fossorial or saltatorial) could affect limb bone morphology throughoutontogeny. We explore how the measurements of the forelimbs and functional indices change along the postnatal ontogeny of 92specimens of sigmodontines belonging to four genera (Akodon, Eligmodontia, Oligoryzomys, and Oxymycterus) with differentlocomotor types (ambulatory, quadrupedal-saltatorial, scansorial, and semifossorial). We examined individuals of different agecategories: juveniles, young adults, and adults. Eleven linear measurements of long bones (humerus, radius, and ulna) corre-sponding to functional diameters and lengths were taken and analyzed through simple regressions (RMA) using geometric meantransformations. Six morphofunctional indices were then calculated and analyzed through multivariate analysis (MANOVA).The allometric patterns and morphofunctional indices show that the forelimb tends to be elongated and slender in the ambulatory,scansorial, and quadrupedal-saltatorial species, and short and thicker in the semifossorial species. Morphofunctional indices donot separate our sample concerning age categories, possibly indicating that the juveniles of different rodent species are born withsimilar morphology to the adults in terms of locomotion.