Statewide Sport Fish Harvest Survey for effort, catch, and harvest estimates, Alaska, 1996-2016

The Sport Fish Division of the Alaska Department of Fish and Game conducts an annual mail survey to estimate sport fish harvest and catch by fisheries, areas, regions in which the fish were caught, and species. Obtaining these data provides decision-makers with the information needed to maintain, protect, and improve recreational fisheries.The survey was first implemented in 1977, capturing harvest only metrics, but was expanded to include harvest plus fish caught and released in 1990. The current version of the survey was last revised in 2011 and is now designed to capture guided and non-guided fishing activity throughout the state of Alaska. The Alaska Sport Fishing Survey database made data from 1996 to 2016 available through a query application. Prior years data have not been included in this dataset, but can be found in historic publications (https://www.adfg.alaska.gov/sf/sportfishingsurvey/index.cfm?ADFG=main.historic). In accordance with guidelines established by Mills and Howe, other than to document that sport fishing occurred, estimates based on fewer than 12 responses should not be used. Estimates based on 12 to 29 responses can be useful in indicating relative orders of magnitude and for assessing long-term trends. Estimates based on 30 or more responses are generally useable. More information about the survey is available at the Alaska Sport Fishing Survey webpage (http://www.adfg.alaska.gov/sf/sportfishingsurvey/). In this dataset is the original excel file, an R script that reformats this file, and 3 csv files derived from the original file. Also included are two ADFG reports, in pdf format, which explain how these data are gathered and processed by ADFG.阿拉斯加州鱼类与狩猎局（Alaska Department of Fish and Game, ADFG）下属游钓鱼类部门每年都会开展邮寄调查，以按渔业类型、捕捞区域、捕捞鱼种统计游钓鱼类的捕捞量（被带走的渔获）与总钓获量。获取此类数据可为决策者提供维持、保护并优化休闲渔业所需的关键信息。 该调查最初于1977年启动，仅采集捕捞量相关指标；1990年起扩展为同时涵盖捕捞量与钓获放流数据。当前版本的调查方案于2011年完成最后一次修订，如今旨在覆盖阿拉斯加州全境的向导式垂钓与非向导式垂钓活动。 阿拉斯加游钓调查数据库可通过查询应用程序提供1996年至2016年的调查数据。此前年份的调查数据未纳入本数据集，但可在历史出版物中查阅（https://www.adfg.alaska.gov/sf/sportfishingsurvey/index.cfm?ADFG=main.historic）。 根据Mills与Howe制定的相关指南，除仅用于记录垂钓活动发生情况外，基于少于12份有效回复的估算结果不应被采用。基于12至29份有效回复的估算结果仅可用于指示相对数量级及评估长期趋势。基于30份及以上有效回复的估算结果通常可正常使用。 有关该调查的更多详细信息可访问阿拉斯加游钓调查官方网页（http://www.adfg.alaska.gov/sf/sportfishingsurvey/）。 本数据集包含原始Excel文件、用于重新格式化该文件的R脚本，以及3份源自原始文件的CSV文件。此外还附带两份ADFG发布的PDF格式报告，详细说明ADFG采集并处理此类数据的具体流程。