Coho salmon brood table, Kuskokwim River, Alaska, 2000-2012

Brood tables, also called run reconstructions, utilize annual estimates of the total run (commercial catch plus escapement), and samples of ages, to estimate the number of recruits per age class. These data are useful for salmon biologists to understand salmon productivity and salmon life histories. Archived here are the original PDF from which the data were extracted, the original .csv file with this extracted data, an R script that slightly reformats the dataset into a format consistent with other brood tables collected as part of the State of Alaskan Salmon and People project (https://alaskasalmonandpeople.org/), and the reformatted table as a .csv file. Age classes are given in European Notation, where the first number is the number of winters spent in freshwater before going to sea (1 winter in freshwater = age-1.X), and the second number is the number of winters spent at sea (3 winters at sea = age-X.3).亲代种群表（brood tables，亦称种群重建表（run reconstructions））基于总洄游种群（商业捕捞量与逃逸种群之和）的年度估算值及年龄样本，估算各年龄组的补充个体数量。该数据集可助力鲑鱼生物学家探究鲑鱼生产力与生活史特征。本存档包含以下文件：提取原始数据的PDF文档、存储提取所得数据的原始.csv文件、一段R脚本（该脚本可将数据集稍作格式调整，使其与阿拉斯加鲑鱼与人类状况项目（State of Alaskan Salmon and People，https://alaskasalmonandpeople.org/）所收集的其他亲代种群表格式保持一致），以及经格式调整后的.csv格式数据表。年龄组采用欧洲式年龄标注法（European Notation），其中第一个数字代表入海前在淡水环境中度过的冬季数量（淡水越冬1个冬季对应年龄-1.X），第二个数字代表在海洋环境中度过的冬季数量（海洋越冬3个冬季对应年龄-X.3）。