Stable Carbon and Nitrogen Isotope Analysis Explores Diverse Domestic Goose Management Practices in Medieval and Postmedieval Russia
Bibliographic Data
Studying goose domestication through archaeological finds has been challenging due to the similar skeletal morphology of the European domestic goose and its wild progenitor, the greylag goose ( Anser anser ). We analyzed stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopes from bone collagen of subfossil domestic and potentially domestic geese to investigate dietary differences indicative of domestication. These samples were previously analyzed for mitochondrial DNA (mtDNA), which can distinguish between wild greylag geese and their domestic form, although some specimens exhibited atypical mtDNA haplotypes or haplotypes belonging to other wild Anser species. We also verified the chronological age of the bones through radiocarbon dating, which yielded dates ranging from the Medieval to Postmedieval periods (600–1600 ce ). We revealed that some Russian domestic geese were probably supplementary fed with fodder fertilized with animal manure, while others were allowed to free‐roam, indicating variable goose management practices in the Middle Volga region. Some of the geese exhibited high δ 15 N values, which may indicate the inclusion of animal protein in the diet, and one goose showed evidence of marine components or consumption of either C 4 ‐plants growing in arid or saline habitats or manure‐fertilized agricultural C 4 plants. Stable isotope analysis was informative regarding supplementary feeding, but could not reliably determine wild or domestic status, as some genetically domestic geese exhibited low δ 15 N values, suggesting a wild‐like diet. Therefore, the domestic or wild status of specimens with taiga bean goose mtDNA remains unresolved. Tamed wild geese also present a limitation to this method, as they may receive the same diet as domestic geese
Anatidae · Ancient DNA · Domestication · Goose · Habitat · Isotope analysis · Radiocarbon dating · δ15N · Animal Diversity and Health Studies · Identification and Quantification in Food · Livestock and Poultry Management
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