Market squid—seine commercial fishing grounds, South Coast Region, 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 market squid—seine landings in the California South Coast 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 market squid—seine 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 market squid—seine commercial fishing grounds for the South Coast Region in the year 2012.

本数据集隶属于Point 97开展的题为《加州南海岸商业渔业基线建立与初始空间及经济变化评估》的项目。该项目是《加州南海岸海洋保护区（Marine Protected Area, MPA）基线监测项目》的组成部分，旨在表征南海岸区域自海洋保护区实施以来的生态、社会经济状况及其变化。本研究的南海岸研究区域北起康塞普西翁角，南至加州与墨西哥边境。本数据集包含2013年夏季通过对2012年在加州南海岸有市场鱿鱼围网渔获上岸记录的商业渔民开展渔业测绘访谈所收集的数据。访谈过程中，受访者被要求绘制2012年的作业渔场分布图，并通过将100枚便士分摊至各个作业渔场的方式，确定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：将每位渔民提供的加权作业渔场，依据其2012年市场鱿鱼围网渔业的船边交货收入进行二次加权，由此生成该渔业各港口的空间数据集。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）的商业渔获上岸数据，以各港口2012年该渔业的总船边交货收入为权重，对港口级数据进行聚合。本数据集表征了2012年南海岸区域市场鱿鱼围网商业作业渔场的空间分布范围及相对价值。