Here, we present new δ¹³С and δ¹⁵N data for modern and archaeological freshwater fish bone collagen from Siberia, together with summarized isotopic data for the Eurasian Steppe from previous research. Bioarchaeological material is an important source of information about people's lifestyle, economy and diets, and palaeoenvironment. Stable isotope analysis of fish bones, along with other palaeozoological and palaeobotanical material, is used for reconstruction of past human subsistence. The earlier isotopic study of human and faunal bones from the Preobrazhenka 6 site (south of Western Siberia) revealed elevated δ¹³C values in fish bones (from −15.2 to −12.6‰), not typical for inland regions, from the settlement Neolithic layer of the site (Marchenko et al. 2015). In order to determine the possible sources of origin of the archaeological fish with high δ¹³C in inland Central Eurasia, the isotopic composition of modern fish from rivers and lakes of the south of Western Siberia was analysed. The results show a large range of δ¹³C in modern fish bones – from −29.6 to −8.3‰. Fish with high carbon isotopic values came from small, rather ancient (within the Holocene period) endorheic lakes.

在这里，我们展示了来自西伯利亚的现代和考古淡水鱼骨胶原蛋白的新 δ ¹³ С 和 δ ¹⁵ N 数据，以及来自先前研究的欧亚草原的总结同位素数据。生物考古材料是有关人们生活方式、经济和饮食以及古环境的重要信息来源。鱼骨的稳定同位素分析以及其他古动物学和古植物学材料用于重建过去的人类生活。对来自 Preobrazhenka 6 遗址（西西伯利亚南部）的人类和动物骨骼的早期同位素研究表明，δ ¹³升高来自该遗址新石器时代沉积层的鱼骨中的 C 值（从 -15.2 到 -12.6‰），内陆地区不典型（Marchenko 等人，2015 年）。为了确定欧亚大陆中部内陆高δ ¹³ C考古鱼类的可能来源，对西西伯利亚南部河流和湖泊现代鱼类的同位素组成进行了分析。结果表明，现代鱼骨中的 δ ¹³ C范围很广——从 -29.6 到 -8.3‰。具有高碳同位素值的鱼来自较小的、相当古老的（在全新世时期内）内陆湖泊。