Urchin—dive commercial fishing grounds, Santa Barbara, Post MPA

This data set is a part of Point 97's project entitled: Establishing a Baseline and Assessing Initial Spatial and Economic Change in the California South Coast Commercial Fisheries. This project is a component of the California South Coast Marine Protected Area Baseline Monitoring Project that is designed to characterize the ecological and socioeconomic conditions and changes within the South Coast Region since MPA implementation. The South Coast study region extends from the north at Point Conception to the south at the California/Mexico border. This data set consists of data collected in the summer of 2013 from fisheries mapping interviews conducted with commercial fishermen who had urchin—dive landings in Santa Barbara in 2012. During interviews fishermen were asked to map their fishing grounds for 2012 and determine the relative importance of each fishing ground by allocating 100 pennies across their fishing grounds for this fishery. The spatial data from these interviews were then combined through an aggregation process where the weighted fishing grounds each fisherman gave were further weighted by their ex-vessel revenue from the urchin—dive fishery in 2012. This created spatial data sets for each port for this fishery. For regional or all port data sets, port level data was aggregated by weighting each port by the port’s total ex-vessel revenue in 2012 for the fishery based on California Department of Fish and Wildlife commercial landings data. This data set represents the spatial extent and relative value of urchin—dive commercial fishing grounds for Santa Barbara in the year 2012.

本数据集隶属于Point 97开展的题为《建立基线并评估加利福尼亚南海岸商业渔业初始空间与经济变化》的项目。该项目是加利福尼亚南海岸海洋保护区（Marine Protected Area, MPA）基线监测项目的组成部分，旨在刻画南海岸地区自MPA实施以来的生态与社会经济状况及其变化。本次研究的南海岸区域范围北起康塞普西翁角（Point Conception），南至美墨边境的加利福尼亚段。本数据集涵盖2013年夏季开展的渔业制图访谈数据，访谈对象为2012年在圣巴巴拉（Santa Barbara）有海胆潜水采捕上岸记录的商业渔民。访谈期间，渔民需绘制其2012年的捕捞作业海域分布图，并通过将100个便士分配至各捕捞海域的方式，明确各海域的相对重要性。随后，通过聚合流程整合本次访谈获取的空间数据：先对每位渔民提供的捕捞海域加权数据，再以其2012年海胆潜水采捕业的船舷收入（ex-vessel revenue）进行二次加权，由此生成该渔业各港口对应的空间数据集。若需生成区域级或全港口数据集，则基于加利福尼亚鱼类与野生动物局的商业上岸数据，以各港口2012年该渔业的总船舷收入为权重，对港口级数据进行聚合。本数据集即代表2012年圣巴巴拉地区海胆潜水采捕商业捕捞海域的空间范围与相对价值。