La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC 4.0 Internacional, https://creativecommons.org/licenses/by-nc/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico rmcg@geociencias.unam.mx.
Ver términos de la licenciaBarrón Ortíz, Christian R., et al. (2014). Dietary resource partitioning in the Late Pleistocene horses from Cedral, north-central Mexico: evidence from the study of dental wear. Revista Mexicana de Ciencias Geológicas; Vol. 31 No. 2, 2014. Recuperado de https://repositorio.unam.mx/contenidos/4160868
Autor(es)
Barrón Ortíz, Christian R.; Theodor, Jessica M.; Arroyo Cabrales, Joaquín; Mejía Chávez, Carlos Gustavo
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Dietary resource partitioning in the Late Pleistocene horses from Cedral, north-central Mexico: evidence from the study of dental wear
Fecha
2015-02-25
Resumen
The Late Pleistocene (late Wisconsinan glacial stage) deposits of the archeological-paleontological site of Cedral, north-central Mexico, have yielded abundant fossil remains of three horse species: Equus mexicanus, E. conversidens, and E. sp. These horses appear to have been sympatric, not only at this locality but in different sites in Mexico and the southwestern United States, posing the possibility that they partitioned available food resources in order to coexist. In this study, we investigated the feeding ecology of the Cedral horses through the analysis of dental wear (i.e., mesowear and microwear). The extended mesowear and low magnification microwear methods were used to infer the paleodiet of each species. The analysis of mesowear reveals significant differences in cusp shape between E. mexicanus and the other two equid species, with the former showing a higher percentage of rounded cusps and lower percentages of sharp and blunt cusps. These differences are consistent with those reported in a recent study of stable isotopes. Furthermore, the analysis of dental microwear indicates significant differences between the microwear patterns of the three equids. The results of the microwear analysis suggest that each species tended to feed on different foodstuffs with varying physical properties, supporting the hypothesis of dietary resource partitioning. Integrating the results derived from the examination of mesowear and microwear, as well as those gathered from the study of stable isotopes, it is suggested that E. conversidens and E. sp. were predominantly grazers, which may have fed at different feeding heights and/or in different microhabitats. Equus mexicanus also appears to have grazed to a large extent, but possibly with a more generalist dietary behavior.
Tema
paleodiet; mesowear; microwear; Equus; Cedral; Mexico; paleodieta; mesodesgaste; microdesgaste; Equus; Cedral; México; witchcraft; Inquisition; justice; brujería; Inquisición; justicia
Idioma
spa
ISSN
ISSN electrónico: 2007-2902; ISSN impreso: 1026-8774
