Data from: Monitoring temporal and spatial trends of illegal and legal fishing in Canada's marine conservation areas using vessel tracking datasets

Data provided are specific to the analyses conducted on AIS-based fishing vessel activity conducted within and surrounding Canada’s static, geographically defined marine CAs. There are three datasets: Marine CAs and the buffer extents that include, the perimeter at 100 m inside and outside the CA, a 1 km buffer extending outside the CA, and a 5 km buffer area extending 1-5 km from the CA. There are shapefiles for the CAs’ and associated buffers for the final time interval when a new CA was enacted during the timeframe of the AIS dataset (2019-08-21). AIS-based fishing effort hours per month from 2012-2019 for each fishing activity category (i.e., illegal, legal, and remainder) specific to the CAs’ extents, the perimeter at 100 m inside and outside the CA, a 1 km buffer extending outside the CA, and a 5 km buffer area extending 1-5 km from the CA. There are four csv files of fishing effort hours per month, one for the CAs' extents and the others for each associated buffer. AIS-based fishing effort hours per year from 2012-2019 for each fishing gear class. There is a raster layer for each fishing gear class identified from 2012-2019.

本次提供的数据专用于针对加拿大静态地理划定的海洋CAs（Conservation Areas, CAs）内部及周边基于船舶自动识别系统（Automatic Identification System, AIS）的渔船活动开展的相关分析。本次数据集共包含三类内容：第一类为海洋CAs及其缓冲区范围的空间数据，具体涵盖CA内部及外侧100米范围的边界、向外延伸1公里的缓冲区，以及距CA边界1至5公里的5公里缓冲区范围。针对AIS数据集时间范围（2019-08-21）内新划定生效的CA，提供了其对应最终时间区间内的CAs及相关关联缓冲区的shapefile数据。第二类为2012-2019年间，针对CAs范围、CA内外侧100米边界、向外延伸1公里缓冲区以及1至5公里的5公里缓冲区，按渔船作业类别（含非法作业、合法作业及其他剩余类别）统计的月度AIS渔船作业时长数据。该类月度作业时长数据共包含4个CSV文件：1个对应CAs本身的范围，其余3个分别对应各关联缓冲区。第三类为2012-2019年间各渔具类别的年度AIS渔船作业时长数据，同时包含2012-2019年间各已识别渔具类别的栅格图层数据。