In this paper, we compile estimates of cod size distributions based on zooarchaeological data and contemporary length-frequency data to look at variability in size composition through time across the North Pacific, from the northern Kuril Islands through the Aleutian Islands to southeast Alaska. The results suggest that a strong longitudinal trend in cod size has remained consistent over time, with the largest cod found to the west. We find that five of nine sites show that overall cod length and distribution of the largest fish remain relatively unchanged. Two sites where we find truncation of the length distributions—or loss of the largest fish—are places where the modern fisheries have the longest history and have been most intense, suggesting a potential for anthropogenic impacts on these local populations. We acknowledge two limitations in these data: (1) there are differences in selectivity between the ancient and modern fisheries; and (2) seasonal variability in fish availability was observed to be an important explanatory variable in the modern data set, but the season of harvest is poorly understood for the ancient collections. Therefore, while differences observed between the two data sets suggest possible anthropogenic influence on the size structure of Pacific cod, they are not conclusive.

在本文中，我们根据动物考古学数据和当代长度频率数据编制了鳕鱼大小分布的估计值，以观察从北千岛群岛到阿留申群岛到阿拉斯加东南部的整个北太平洋的大小组成随时间的变化。结果表明，随着时间的推移，鳕鱼大小的强烈纵向趋势保持一致，其中最大的鳕鱼在西方被发现。我们发现九个地点中有五个表明最大的鱼的总体鳕鱼长度和分布保持相对不变。我们发现长度分布被截断或最大鱼损失的两个地点是现代渔业历史最长且最密集的地方，这表明人为影响可能对这些当地人口产生影响。我们承认这些数据存在两个局限性：（1）古代和现代渔业之间的选择性存在差异；(2) 在现代数据集中观察到鱼类可用性的季节性变化是一个重要的解释变量，但对古代收集的收获季节知之甚少。因此，虽然在两个数据集之间观察到的差异表明可能对太平洋鳕鱼的大小结构产生人为影响，但它们并不是决定性的。