Department of Anthropology, University of British Columbia, 6303 N.W. Marine Drive, Vancouver, BC, V6T 1Z1, Canada; Department of Human Evolution, Max-Planck-Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany.
Rapid Commun Mass Spectrom. 2013 Oct 30;27(20):2255-62. doi: 10.1002/rcm.6682.
This study presents the first sulphur isotope data of modern and archaeological cod (Gadus morhua) bone collagen, undertaken to identify large-scale spatial variability of significance as both baseline values for studies of human diet and a potential variable in isotope-based studies of fish trading.
Collagen was extracted from modern and archaeological cod bones using a weak HCl solution and analysed for its sulphur isotopic composition by isotope ratio mass spectrometry (IRMS).
The archaeological cod have sulphur isotope values ranging from +9.1‰ to +18.2‰, whereas values for modern specimens range from +14.8‰ to +18.3‰. The modern data show values implying less freshwater influence, consistent with their offshore catch locations, but also corroborate some of the regional variability evident from the archaeological evidence.
The archaeological data have a large range of sulphur isotope values compared with the modern populations, probably indicating they were taken from a wide range of geographic locations, including both coastal and offshore locales. They show broad trends of regional difference that may relate to both the fish populations targeted (e.g. 'inshore' versus 'offshore') and the baseline values of the local ecosystem (e.g. degree of freshwater input from river systems).
本研究首次提供了现代和考古鳕鱼（Gadus morhua）骨胶原的硫同位素数据，旨在确定具有重要意义的大规模空间变异性，作为人类饮食研究的基线值，并作为基于同位素的鱼类贸易研究中的潜在变量。
使用弱盐酸溶液从现代和考古鳕鱼骨骼中提取胶原蛋白，并通过同位素比质谱（IRMS）分析其硫同位素组成。
考古鳕鱼的硫同位素值范围为+9.1‰至+18.2‰，而现代标本的值范围为+14.8‰至+18.3‰。现代数据显示，受淡水影响较小的值与其近海捕捞地点一致，但也证实了一些考古证据中明显的区域变异性。
与现代种群相比，考古数据的硫同位素值范围较大，可能表明它们取自广泛的地理位置，包括沿海和近海地区。它们显示出与鱼类种群（例如“近岸”与“远岸”）和当地生态系统的基线值（例如河流系统的淡水输入程度）相关的区域差异的广泛趋势。
