Estado de conservación de la última población de guanacos chaqueños de Argentina: un abordaje transdisciplinar

Assessing the diet of modern and archaeological guanacos from the Great Chaco in Córdoba, Argentina, through stable isotope analysis (δ13C, δ15N) of bone and dentin collagen: Implications for paleoenvironmental and zooarchaeological studies

“…However, additional data on the nutritional quality of Geoffroea decorticans is required to support this statement. Alternatively, δ 13 C values obtained in our study could indicate a certain homogeneity and stability of guanacos' diet during their lifetime, or at least during their early years, which would be consistent with previous microhistological analysis and with the small patch this population inhabits (Barri et al, 2023;Geisa et al, 2018).…”

“…in Minas Department, Northwestern Córdoba province, in Central Argentina (Figure 1). The assemblage encompasses carcasses with different degrees of integrity and isolated specimens that lacked anatomical relationship at the time of collection, all deriving from the same relictual biological population (Barri et al, 2023;Costa et al, 2022;Costa and Barri, 2018;Weihmüller, 2023). The causes of death are varied, including poaching, entanglement in fences, and natural or unknown causes.…”

“…Of the 18 individuals under study, six were males, six females, and six indeterminate. As regards age, five were defined as subadults and 13 as prime adults (Barri et al, 2023;Costa and Barri, 2018;Weihmüller, 2023). Both deciduous (n = 6) and permanent (n = 12) maxillary premolars were sampled from 18 skulls for the isotopic analysis of their dentin; this sampling strategy was a product of the poor preservation of bone samples and the availability of these specific teeth.…”

“…Costa, 2016;del Papa, 2020;Manzano-García et al, 2019;Medina and Rivero, 2020;Pascual, 1954;Rivero and Medina, 2016). Notwithstanding this, only two native guanaco populations currently survive in this vast territory: one in the Santa Cruz Department in Bolivia (Cuéllar Soto et al, 2017) and another in the perisaline area of Córdoba province in Argentina (Barri et al, 2023;Costa and Barri, 2018). The latter, one of the subjects of this paper, is composed of 60-80 individuals organised in no more than six reproductive groups of six to nine animals (~3 calves), in addition to a few male groups and solitary individuals (Barri et al, 2023).…”

“…Notwithstanding this, only two native guanaco populations currently survive in this vast territory: one in the Santa Cruz Department in Bolivia (Cuéllar Soto et al, 2017) and another in the perisaline area of Córdoba province in Argentina (Barri et al, 2023;Costa and Barri, 2018). The latter, one of the subjects of this paper, is composed of 60-80 individuals organised in no more than six reproductive groups of six to nine animals (~3 calves), in addition to a few male groups and solitary individuals (Barri et al, 2023). Aside from this native population, in 2007 a Patagonian population was reintroduced in the Quebrada del Condorito National Park (1500-2300 m.a.s.l.…”