Author, as appears in the article.: Díez-Canseco C; Aguilera M; Tornero C
Department: Història i Història de l'Art
URV's Author/s: Díez-Canseco Esteban, Celia
Keywords: Tooth dentine Stable carbon Serial sampling Sequential analysis Ratios Plants Oxygen delta-o-18 Nitrogen delta-n-15 N-15 natural-abundance Modern reference data set Fractionation Dietary Cattle Carbon and nitrogen isotopes Bone-collagen
Abstract: Hypsodont teeth molars develop in a short lapse of time. Both dentine and enamel dental tissues do not regenerate once formed. This fact allows the reconstruction of isotopic sequences covering short moments of the individual's life span, a useful approach in current zooarchaeological and paleontological studies. Sampling design usually follows a serial or sequential extraction of dental bands perpendicular to the tooth growth axis, from the apex to the root. However, dentine develops following a secretion of layers oblique to the tooth vertical axis, and this pattern makes hard to isolate isotopic signals. A new experimental study with modern sheep breeds was conducted, covering a whole year and where carbon and nitrogen isotopic signatures of consumed plants were known. Three diet periods with different isotopic compositions were alternated during sheep's life. In this contribution, we test the resolution of a dentine sampling procedure to obtain intra-tooth isotopic variability of delta C-13(collagen) and delta N-15(collagen) values tied to diet shifts in sheep. Dentine was sequentially sampled in previously demineralized second and third mandibular molars. Samples were treated with standard protocols of collagen purification and then subjected to stable carbon and nitrogen isotope analysis. In M2 and M3 isotopic sequences obtained, diet shifts are recorded along two progressive trends of increasing-decreasing values, but some affections of the sampling procedure are also present. We conclude that the dentine sequential sampling here implemented allows for obtaining reliable intra-tooth isotopic data tied to dietary conditions in high-crowned teeth, although dentine growth patterns should be considered in detail in final interpretations. The integration of this high-resolution analysis in archaeological studies offers a new scope of possibilities for studying dietary patterns, seasonal dietary changes, and animal husbandry practices in past populations.
Thematic Areas: Saúde coletiva Interdisciplinar Historia Ciencias sociales Ciencias humanas Archeology (arts and humanities) Archeology Archaeology Antropologia / arqueologia Antropología Anthropology
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: celia.diez-canseco@estudiants.urv.cat
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: International Journal Of Osteoarchaeology.
APA: Díez-Canseco C; Aguilera M; Tornero C (2022). Intra-tooth isotopic analysis (delta C-13 and delta N-15) of dentine collagen in high-crowned teeth: A new experimental study with modern sheep specimens. International Journal Of Osteoarchaeology, (), -. DOI: 10.1002/oa.3138
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications
Repositori URV