Livestock management during times of transition. Exploring the relationship between animal size and diet from Roman to early medieval Augusta Raurica (Switzerland)

Zooarchaeological research all over Europe has suggested a generalised pattern of livestock size decrease during the transition between the Roman times and the Early Middle Ages. Different reasons have been proposed to explain this pattern, including a change in management and feeding practices, in the context of a shift of animal husbandry from large to small scale production. This paper is based on faunal material from Roman and early medieval Augusta Raurica, north-western Switzerland, and provides a first attempt to test this hypothesis, by combining zooarchaeological information (taxonomic frequencies and biometrical analysis) and stable carbon and nitrogen isotope data from bone collagen of cattle and pig. The results suggest important changes in livestock management, such as a shift towards pig husbandry, and evidence for increased use of pannage and forest pastures has been found.