We studied 36 dogs (Canis familiaris) from the Can Roqueta site in the Catalan pre-littoral depression (Barcelona), dated between the Late Bronze Age and the First Iron Age (1300 and 550 cal BC). We used a sample of 27 specimens to analyse the evolution of the dogs’ diet based on the carbon δ¹³C and nitrogen δ¹⁵N isotope composition. The results show a marked human influence in that these natural carnivores display a highly plant-based diet. The offset between canids and herbivorous ungulates does not reach the minimum established for a trophic level, which implies an input of C₃ and C₄ (millet) cultivated plants. Moreover, the homogeneity in the values indicates that humans prepared their dogs’ food.

我们研究了来自加泰罗尼亚滨海洼地（巴塞罗那）Can Roqueta 遗址的36 只狗（ Canis familis ），它们的历史可以追溯到青铜时代晚期和第一个铁器时代（公元前 1300 年至 550 年）。我们使用 27 个样本，根据碳 δ ¹³ C 和氮 δ ¹⁵ N 同位素组成分析了狗饮食的演变。结果表明，人类的显着影响使这些天然食肉动物的饮食以植物为主。犬科动物和草食性有蹄类动物之间的偏移未达到营养水平所确定的最小值，这意味着 C ₃和 C ₄（小米）栽培植物的输入。此外，这些值的同质性表明人类为狗准备了食物。