Dungeness crab trap commercial fishing grounds for the North Central Coast Region in the year 2010

This data set is a part of Ecotrust's project entitled: Establishing a Baseline and Assessing Initial Spatial and Economic Change in the California North Central Coast Commercial Fisheries. This project is a component of the California North Central Coast Marine Protected Area Baseline Monitoring Project that is designed to characterize the ecological and socioeconomic conditions and changes within the North Central Coast Region since MPA implementation. The North Central Coast study region extends from the north at Alder Creek to the south at Pigeon Point. This data set consists of data collected in the summer of 2011 from fisheries mapping interviews conducted with commercial fishermen who had Dungeness crab—trap landings in the California North Central Coast in 2010. During interviews fishermen were asked to map their fishing grounds for 2010 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 Dungeness crab—trap fishery in 2010. 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 2010 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 Dungeness crab—trap commercial fishing grounds for the North Central Coast Region in the year 2010.

该数据集是Ecotrust项目的一部分，项目名称为：《加州中北部海岸商业渔业基准建立与初始空间及经济变化评估》。该项目是加州中北部海岸海洋保护区（Marine Protected Area，MPA）基准监测项目的组成部分，旨在描述MPA实施以来中北部海岸区域内的生态及社会经济状况与变化。中北部海岸研究区域北起Alder Creek，南至Pigeon Point。该数据集包含2011年夏季通过渔业地图绘制访谈收集的数据，访谈对象为2010年在加州中北部海岸有珍宝蟹（Dungeness crab）笼捕上岸量的商业渔民。访谈中，渔民需绘制其2010年的渔场分布图，并通过在该渔业的各渔场间分配100枚虚拟硬币来确定每个渔场的相对重要性。这些访谈得到的空间数据随后通过聚合过程合并，其中每位渔民提供的加权渔场进一步以其2010年珍宝蟹笼捕渔业的离船收入（ex-vessel revenue）进行加权。这为该渔业的每个港口生成了空间数据集。对于区域或全港口数据集，基于加州鱼类及野生动物部（California Department of Fish and Wildlife）的商业上岸量数据，通过该渔业2010年各港口的总离船收入对港口进行加权，从而聚合港口级数据。该数据集代表了2010年中北部海岸区域珍宝蟹笼捕商业渔场的空间范围及相对价值。