California Halibut - hook and line commercial fishing grounds for the port of Bodega Bay 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 California halibut—hook and line 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 California halibut—hook and line 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 California halibut—hook and line commercial fishing grounds for the port of Bodega Bay in the year 2010.本数据集隶属于生态信托（Ecotrust）开展的题为「建立基线并评估加州北中海岸商业渔业初始空间与经济变化」的项目。该项目是加州北中海岸海洋保护区（Marine Protected Area, MPA）基线监测项目的组成部分，旨在刻画自MPA实施以来北中海岸区域的生态、社会经济状况及其变化趋势。本次研究的北中海岸区域北起阿尔德溪（Alder Creek），南至鸽子角（Pigeon Point）。本数据集采集于2011年夏季，数据源自对2010年在加州北中海岸开展加州庸鲽（California halibut）钩钓（hook and line）作业并完成上岸的商业渔民所开展的渔业空间映射访谈。访谈期间，渔民需绘制2010年的作业渔场分布图，并通过将100枚便士分配至各作业渔场的方式，量化各渔场的相对重要性。随后，通过聚合流程整合本次访谈获取的空间数据：先将每位渔民提供的加权作业渔场，以其2010年加州庸鲽钩钓渔业的码头交货收入进行二次加权，由此生成该渔业各对应港口的空间数据集。针对区域级或全港口数据集，则依据加州鱼类与野生动物部（California Department of Fish and Wildlife）的商业上岸统计数据，以各港口2010年该渔业的总码头交货收入为权重完成聚合。本数据集即代表2010年博德加湾（Bodega Bay）港口的加州庸鲽钩钓商业作业渔场的空间范围与相对价值。