“…The Bayesian mixing models present a limitation for discriminating among more than six/seven resources with different isotopic mean values when using only two biotracers (Moore & Semmens, 2008;Stock et al, 2018). Consequently, animals found in the zooarchaeological record in low frequencies, such as carnivores (puma, foxes, small cats, and ferrets), other rodent species (Lagidium, Dolichotis, Ctenomys, and cavins), birds, fish, and mollusks, cannot be incorporated into the mixing models (Andrade & Fernández, 2017;Cordero, 2010;Guillermo et al, 2019;Lezcano et al, 2010;Menegaz, 1996;Pérez & Smith, 2008;Silveira, 1996Silveira, , 1999Silveira & Cordero, 2014). The where the joint exploration of the zooarchaeological record and human isotopic values indicated that, among the resources found in low frequency, fish and birds could be important (Gord on et al, 2018), and the inclusion of these resources in the Bayesian mixing models substantially improves the results (Figure 5).…”