Annual salmon hatchery releases from the Hatchery Release Report Form, Alaska, 1952-2017

The data was taken from the Hatchery Release Report on the Alaska Department of Fish and Game website (https://mtalab.adfg.alaska.gov/CWT/reports/hatcheryrelease.aspx) on 04-04-2018. The data file HR002286.csv includes the annual salmon hatchery release data from 1952-2017 in Alaska. This dataset includes the total release count from different release agencies throughout the state. The file lists information about coded wire tag and Alaskan non-coded wire tag groups released since 1968. While there is information about non-Alaskan coded wire tag groups from the data, it is primarily intended for Alaskan Hatchery production release summaries. This dataset was generated by selecting all releases (including non-thermally marked), from all release agencies, species, and rearing codes, from the state of Alaska. The district_region_lut.csv file enables assignment of region for the State of Alaskan Salmon and People (SASAP) project to be assigned based on the district information. Hatchery_releases.csv is generated from HR002286.csv and district_region_lut.csv by the Rmd, which adds the SASAP region and district information, converts some codes (such as species codes) to more readable names, and makes some summary plots.本数据集数据取自阿拉斯加鱼类与狩猎部（Alaska Department of Fish and Game）官网（https://mtalab.adfg.alaska.gov/CWT/reports/hatcheryrelease.aspx）于2018年4月4日发布的孵化场放流报告。数据文件HR002286.csv收录了1952年至2017年阿拉斯加年度鲑鱼孵化场放流数据，涵盖全州各放流机构的总放流量统计。该文件列出了1968年以来放流的编码金属线标签（coded wire tag）组别以及阿拉斯加本地非编码金属线标签组别的相关信息。尽管数据中包含非阿拉斯加地区的编码金属线标签组别信息，但本数据集主要用于阿拉斯加孵化场生产放流的汇总分析。本数据集通过选取阿拉斯加州范围内所有放流机构、物种及育苗代码对应的全部放流记录（包括未进行热标记的个体）生成。district_region_lut.csv文件可基于行政区划信息，为阿拉斯加鲑鱼与人类项目（State of Alaskan Salmon and People，简称SASAP）分配区域归属。Hatchery_releases.csv由HR002286.csv与district_region_lut.csv通过Rmd脚本生成，该脚本补充了SASAP区域及行政区划信息，将部分代码（如物种代码）转换为更易读的名称，并生成了若干汇总图表。