INVESTIGADORES
SEGURA GAGO Alda Valentina
artículos
Título:
A quantitative approach to the cranial ontogeny of the puma
Autor/es:
GIANNINI, N.; SEGURA, VALENTINA; GIANNINI, M.I.; FLORES D.
Revista:
MAMMALIAN BIOLOGY
Editorial:
ELSEVIER GMBH
Referencias:
Año: 2010 vol. 75 p. 547 - 554
ISSN:
1616-5047
Resumen:
The cranial ontogeny of specialized mammals is relevant to the understanding of the
connection of form and function in a developmental and evolutionary context. As
specialized carnivores, felids are of especial interest. We studied the postnatal ontogeny
of the skull in Puma concolor using a quantitative approach integrated with previous
results of qualitative assessment of ontogenetic changes. We report patterns of
multivariate allometry of 19 linear skull dimensions measured in 48 Argentine
specimens of puma. We examined the (jackknife resampled) departures from isometry
as well as the interplay of isometric and allometric trends in shaping the puma skull.
Both the qualitative and quantitative results indicate that the major ontogenetic changes
are directly linked to cranial structures that support a developing masticatory apparatus
and its associated masticatory and neck musculature, which are essential for the action
of canines and carnassials during the killing bite and the slicing of flesh. Sexual
differences suggest that hypo- and hyper-morphosis are key heterochronic processes in
the development of the puma skull.