Nearshore finfish—live—fixed gear commercial fishing grounds for the port of Half Moon 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 Nearshore finfish—live—fixed gear 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 Nearshore finfish—live—fixed gear 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 Nearshore finfish—live—fixed gear commercial fishing grounds for the port of Half Moon Bay in the year 2010.

本数据集为Ecotrust（生态信托）题为《建立加利福尼亚中北海岸商业渔业基线并评估其初始空间与经济变化》项目的组成部分。该项目是《加利福尼亚中北海岸海洋保护区（Marine Protected Area，MPA）基线监测项目》的子项目，旨在刻画自MPA实施以来中北海岸区域的生态、社会经济状况及其变化情况。本次研究的中北海岸研究区域北起阿尔德溪（Alder Creek），南至鸽子角（Pigeon Point）。本数据集采集自2011年夏季开展的渔业绘图访谈，访谈对象为2010年在加利福尼亚中北海岸开展近岸活渔获硬骨鱼定置渔具（Nearshore finfish—live—fixed gear）捕捞并实现渔获上岸的商业渔民。访谈过程中，渔民需绘制其2010年的捕捞作业海域分布图，并通过将100枚虚拟便士分摊至各捕捞海域的方式，明确各海域的相对重要性。随后，通过聚合处理流程整合本次访谈获取的空间数据：先以渔民提供的各捕捞海域权重为基础，再结合其2010年近岸活渔获硬骨鱼定置渔具捕捞的码头交货收入（ex-vessel revenue）进行二次加权，由此生成该渔业各对应港口的空间数据集。若需生成区域级或全港口数据集，则需基于加州鱼类与野生动物部（California Department of Fish and Wildlife）的商业渔获上岸数据，以各港口2010年该渔业的总码头交货收入为权重，对港口级数据进行聚合处理。本数据集即代表2010年半月湾港（Half Moon Bay）近岸活渔获硬骨鱼定置渔具商业捕捞海域的空间范围及其相对价值。