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.

子代数据表（又称洄游重建表）会利用年度总洄游群体估算值（商业捕捞量加上逃逸亲体量）以及年龄样本，估算各年龄组的补充个体数量。此类数据可为鲑鱼生物学家研究鲑鱼生产力与生活史提供有力支撑。此类数据格式多样，但通常遵循统一范式：行代表每个繁育年份，列代表各年龄组的预估鱼类数量。本数据集包含阿拉斯加西部地区重新格式化后的子代数据表。这些数据集是《阿拉斯加鲑鱼与民众》（State of Alaskan Salmon and People）项目的调研成果，项目网址为https://alaskasalmonandpeople.org/。年龄组采用欧洲记龄法标注：第一位数字代表入海前在淡水环境中度过的冬季时长（淡水越冬1年对应年龄-1.X），第二位数字代表在海洋环境中度过的冬季时长（海洋越冬3年对应年龄-X.3）。对于奇努克鲑鱼（chinook salmon），仅标注总年龄（年龄X）。