Salmon brood tables, Westward Region, Alaska

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. These data can come in a number of different formats, but generally follow the pattern of: rows for each brood year, and columns for the estimated number of fish in each age class. This dataset consists of reformated brood tables from the Westward Region of Alaska. These datasets were gathered as part of the State of Alaskan Salmon and People project (https://alaskasalmonandpeople.org/). 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). For chinook salmon, only total age (age X) is given.

亲鱼表（brood tables）又称洄游量重建表（run reconstructions），依托年度总洄游量（商业捕捞量与逃逸量之和）的估算结果及年龄样本数据，估算各年龄组的补充个体数。这类数据可为鲑鱼生物学家解析鲑鱼种群生产力与生活史提供重要支撑。该类数据存在多种呈现形式，但普遍遵循统一结构：行对应每个亲鱼繁殖年份，列对应各年龄组的估算鱼类数量。本数据集为阿拉斯加西部地区重新格式化后的亲鱼表，相关数据采集自《阿拉斯加鲑鱼与人类项目》（State of Alaskan Salmon and People project，https://alaskasalmonandpeople.org/）。本数据集采用欧洲年龄计数法标注年龄组：第一位数字代表入海前在淡水环境中的越冬次数（淡水越冬1次对应年龄-1.X），第二位数字代表海洋中的越冬次数（海洋越冬3次对应年龄-X.3）。针对奇努克鲑（chinook salmon），仅标注其总年龄（年龄X）。