INGEIS   05370
INSTITUTO DE GEOCRONOLOGIA Y GEOLOGIA ISOTOPICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Intra-individual variation in carbon and nitrogen isotope composition from bone and dentin collagen from a modern wild camelid in the Dry Puna of Argentina
Autor/es:
SAMEC, C. T. ; ARZAMENDIA, Y.; BALDO, J.; PANARELLO, H.O.; YACOBACCIO, H. D.
Lugar:
Mendoza
Reunión:
Conferencia; 12th International Conference ICAZ; 2014
Institución organizadora:
Internarional Council for Archaeology
Resumen:
The
isotopic composition of tissues formed at different times and with different
turnover rates can be used to address dietary and physiological variation in
animal populations, especially when studying aspects such as diet seasonality,
movement and weaning in wild animals from modern and archaeological contexts. Isotopic
values of bone reflect diet during the whole animal life since its collagen is
constantly but slowly remodeled. In contrast, isotopic values of tooth dentin
reflect diet during the early years of an animal life since its collagen does
not remodel after formation. Previous studies in mammal species have shown
higher dentin collagen d13C and d15N
values when compared to bone collagen ones, although in some cases d13Cdentin
collagen values are lower than bone collagen ones. The 15N enrichment in dentin
collagen relative to bone collagen is known to be a product of suckling, which
can lead to higher d15N values in teeth formed before weaning. The application
of intra-individual isotopic analysis to the study of archaeological scenarios
and past ecosystems requires a modern reference data set. For this reason, we
conducted a preliminary study of the variation in d13C and d15N values measured
on bone and dentin collagen from a wild camelid species (V. vicugna) of the Dry
Puna of Argentina. This work represents the first step towards sequential
sampling of camelid teeth in order to tackle diet seasonality and movement
patterns of camelid herds in the past.