Diet and food strategies in a southern al-Andalusian urban environment during Caliphal period, ecija, Sevilla

The Iberian medieval period is unique in European history due to the widespread socio-cultural changes that took place after the arrival of Arabs, Berbers and Islam in 711 AD. Recently, isotopic research has been insightful on dietary shifts, status, resource availability and the impact of environment. However, there is no published isotopic research exploring these factors in southern Iberian populations, and as the history of this area differs to the northern regions, this leaves a significant lacuna in our knowledge. This research fills this gap via isotopic analysis of human (n = 66) and faunal (n = 13) samples from the 9th to the 13th century Écija, a town renowned for high temperatures and salinity. Stable carbon (δ13C) and nitrogen (δ15N) isotopes were assessed from rib collagen, while carbon (δ13C) values were derived from enamel apatite. Human diet is consistent with C3 plant consumption with a very minor contribution of C4 plants, an interesting feature considering the suitability of Écija to C4 cereal production. δ15N values vary among adults, which may suggest variable animal protein consumption or isotopic variation within animal species due to differences in foddering. Consideration of δ13C collagen and apatite values together may indicate sugarcane consumption, while moderate δ15N values do not suggest a strong aridity or salinity effect. Comparison with other Iberian groups shows similarities relating to time and location rather than by religion, although more multi-isotopic studies combined with zooarchaeology and botany may reveal subtle differences unobservable in carbon and nitrogen collagen studies alone.OLC is funded by Plan Galego I2C mod.B (ED481D 2017/014). The research was partially funded by the projects “Galician Paleodiet” and by Consiliencia network (ED 431D2017/08) Xunta de GaliciaS

Statistical analysis using multistate qualitative variables applied to the human dental morphological traits in the Bronze Age (Granada, Spain, 1300-1500 B.C.)

The study of dental morphological traits in prehistoric populations is a new method of analysis and allows us to determine important characteristics of different human populations. In this paper we study the dental feature traits proposed by the ASU System (developed by Turner et al. in Arizona State University) by means of an alphanumeric and graphic database recording the dental morphological characteristics and the possible dental diseases (caries, dental wear, etc.). These traits are easily observed, and persist many years in dentally harsh life styles, evolving very slowly and without sex dimorphism. The multivariate data set obtained using the ASU System is defined by means of multistate qualitative variables, and the methodology of statistical analysis is the following: – The MMD test (Mean Measures of Divergence) was developed by Sjovold (1977) to observe the differences between two or more previously established and defined groups by means of multistate qualitative variables. It is also possible to test if existing differences among populations are ethnic, cultural, etc. – A Cluster Analysis algorithm developed by one of the authors (Esquivel1988) that enables us to build a grouping using qualitative multistate variables by means of specific developments in Information Theory established by Claude Shannon. Therefore, it is possible to determine the similarities of dental morphological traits between human groups, and compare these results with other previous information from archaeological data. This methodology has been applied to analyse human genetic diversity using exclusively dental morphological characteristics to determine the diffusion of the culture of the Argar, a prehistoric culture which existed in 1300-1500 B.C. The analysis has been applied to the teeth of 116 subjects belonging to the Argaric culture in the neighbouring settlements of Castellón Alto and Fuente Amarga (Granada, Spain), and the teeth of 58 subjects belonging to the non-Argaric settlement of La Navilla, also 1300-1500 B.C., about 150 Kms. distant. The results show a biological continuity, endogamy phenomena and genetic drifts. Finally, the study of the maxillar pathology like cavities and dental wear tells us about dental health, food and food preparation