A non-linear prediction model for ageing foetal and neonatal sheep reveals basic issues in early neolithic husbandry


Pöllath N., García-González R., Kevork S., Mutze U., Zimmermann M. I. , ÖZBAŞARAN M., ...More

Journal of Archaeological Science, vol.130, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 130
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jas.2021.105344
  • Journal Name: Journal of Archaeological Science
  • Journal Indexes: Science Citation Index Expanded, Arts and Humanities Citation Index, Social Sciences Citation Index, Scopus, Academic Search Premier, FRANCIS, International Bibliography of Social Sciences, Periodicals Index Online, L'Année philologique, Anthropological Literature, Art Abstracts, Art Index, Art Source, Artic & Antarctic Regions, Geobase, Index Islamicus
  • Keywords: Ovis, Age estimations, Foetal to infantile sheep, Non-linear prediction model, Ptolemaic-Roman Syene, Early neolithic As&#305, kl&#305, Hoy&#252, k, SHETLAND SHEEP, AGE, GROWTH, BONES, SIZE, CASTRATION, REMAINS, WEIGHT, LAMBS, STAGE

Abstract

© 2021 The AuthorsTraditional methods for estimating age-at-death of caprines are based on dental and epiphyseal fusion data and known to produce rather wide age intervals. In order to better interpret prenatal to early infantile mortality of sheep in prehistoric assemblages more precise age predictions are needed. We address this issue using a Generalized Additive Model (GAM) developed on humerus measurements of unborn and very young sheep of known age housed in modern collections. We then verify the resulting prediction model with the aid of a pregnant ewe and her foetus (Ovis aries) excavated in the Ptolemaic-Roman animal cemetery at Syene (modern Aswan, Egypt). Her condition illustrates that both the mother and her mature foetus must have died during birthing. Subsequently, we apply the model to humeri of very young archaeological sheep (Ovis orientalis/O. aries) unearthed at early Neolithic Aşıklı Höyük (Central Turkey). Both study cases underscore the practicality of our approach whilst illustrating the cultural and historical importance of precise age determinations in foetal, newborn and infantile sheep. Finally, we discuss the possible causes for foetal and neonatal mortality in sheep at Aşıklı Höyük.