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.

阿拉斯加州鱼类与野生动物部（Alaska Department of Fish and Game, ADFG）的游钓鱼类分部（Sport Fish Division），每年都会开展邮寄调查，以按渔业类型、捕鱼区域、捕捞水域及鱼种分类，估算游钓鱼类的渔获量与捕捞总量。获取此类数据可为决策者提供维持、保护及优化休闲渔业所需的核心信息。
该调查最初于1977年启动，仅统计渔获上岸相关指标；1990年扩展为同时涵盖渔获上岸量与钓获放流的鱼类数量。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。
阿拉斯加休闲垂钓调查数据库（Alaska Sport Fishing Survey database）可通过查询应用程序获取1996年至2016年的调查数据。本数据集未纳入此前年份的数据，但相关历史数据可在官方历史出版物中查阅（https://www.adfg.alaska.gov/sf/sportfishingsurvey/index.cfm?ADFG=main.historic）。
根据米尔斯与豪（Mills and Howe）制定的统计指南，除用于记录垂钓活动发生情况外，基于少于12份有效回复得到的估算结果不应被采用；基于12至29份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份及以上回复的估算结果通常可直接使用。
更多关于该调查的详细信息可访问阿拉斯加休闲垂钓调查官方网页（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份由原始文件衍生而来的CSV文件。此外还附带两份PDF格式的ADFG报告，详细说明了ADFG如何收集与处理这些调查数据。