控制饲养研究中猪组织的硫同位素组成

E. Webb, J. Newton, J. Lewis, A. Stewart, B. Miller, J. Tarlton, R. Evershed
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引用次数: 16

摘要

硫同位素测定在古饮食重建中越来越有用,但关于饮食和各种组织之间同位素区分的知识仍然不足。在这项研究中,我们探讨了δ 34tissue值对δ 34s值变化的敏感性,饮食和消费者之间的硫同位素区分,以及陆地和海洋蛋白质消费对这些区分抵消的潜在影响。本文报道了10头成熟母猪、10头仔猪和15头对照饲养猪的骨胶原、肌肉、肝脏、毛发、乳汁和粪便的新δ34S值。δ 34tissue值与δ34Sdiet值存在共变,δ 34tissue - δ34Sdiet的同位素偏移量(Δ34Stissue-diet)虽小但一致,且膳食蛋白质来源并未系统性地改变Δ34Stissue-diet同位素区分。这项研究的结果与仅使用碳和氮稳定同位素难以解决的问题特别相关,并且在陆地,淡水和海洋资源可能都对人类饮食有潜在贡献的地区也将有用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sulphur-isotope compositions of pig tissues from a controlled feeding study
ABSTRACT Sulphur-isotope determinations are becoming increasingly useful for palaeodietary reconstruction, but knowledge of isotopic discrimination between diet and various tissues remains inadequate. In this study, we explore the sensitivity of δ34Stissue values to changes in δ34Sdiet values, sulphur isotopic discrimination between diet and consumer, and the potential impact of terrestrial vs. marine protein consumption on these discrimination offsets. We present new δ34S values of bone collagen, muscle, liver, hair, milk and faeces from ten mature sows, ten piglets and fifteen adolescent pigs from a controlled feeding study. The δ34Stissue values were found to co-vary with the δ34Sdiet values, the δ34Stissue – δ34Sdiet isotopic offsets (Δ34Stissue-diet) are small but consistent, and dietary protein source does not systematically alter the Δ34Stissue-diet isotopic discrimination. The outcomes of this study are of particular relevance to questions that are difficult to resolve using carbon and nitrogen stable isotopes alone, and will also be useful in regions where terrestrial, freshwater, and marine resources could have all potentially contributed to human diet.
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