“…We considered six primary food groups: C 3 crops (Triticum aestivum-durum or wheat, and Hordeum vulgare L. or barley), C 4 crops (Panicum miliaceum or broomcorn millet), cattle (Bos taurus), ovicaprid, pigs (Sus scrofa), poultry (Gallus gallus), and marine and freshwater resources (Anguilla anguilla, Argyrosomus regius, Dicentrarchus labrax, Diplodus sargus, Delphinidae, Merlucciidae, Mugilidae, Scombridae, Sparus aurata, and Zeus faber). Due to the absence of marine remains and C 3 and/or C 4 plant seeds at Castillo de Zorita, we used the δ 13 C and δ 15 N values available in the literature -C 3 cereals by Knipper et al 27 , C 4 cereals by Nitsch et al 28 , Alexander et al 17 , López-Costas and Müldner 29 , and Mion et al 30 ; and freshwater fish by Mion et al 30 . Consequently, it is essential to acknowledge the limitations of our Bayesian model.…”