The freshwater reservoir effect (FRE) was estimated for the northern part of West Siberia for the first time, based on securely dated samples from the late medieval town of Mangazeya existed mainly in AD 1601–1650. Twelve specimens of six species of freshwater fish were selected for ¹⁴C dating, and C and N stable isotopes analysis. The FRE varies from ca. 310 to ca. 1970 ¹⁴C years, and there is no consistency in terms of relationship to feeding habits or trophic level of fish; the FRE fluctuations for Mangazeya, as well as for other regions in northern Eurasia, are noteworthy. This information should be taken into account when ¹⁴C dating of bones of humans and domestic animals, who consume significant amount of freshwater fish, is conducted. This also applies to ¹⁴C dating of food crusts on the surface of pottery.

西伯利亚西部地区的淡水储层效应（FRE）首次被估计，其依据是主要存在于公元1601至1650年的中世纪晚期Mangazeya镇的可靠日期采样。选择了六个淡水鱼类的十二个标本进行¹⁴ C测年，以及C和N稳定同位素分析。FRE大约为 310至 1970年¹⁴ C年，与摄食习惯或鱼营养水平之间的关系并不一致；值得注意的是Mangazeya以及欧亚大陆北部其他地区的FRE波动。¹⁴时应考虑此信息对食用大量淡水鱼的人和家畜的骨骼进行C约会。这也适用于陶瓷表面食物结皮的¹⁴ C定年。