Lobster—trap commercial fishing grounds, San Pedro, 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 lobster—trap landings in San Pedro 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 lobster—trap 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 lobster—trap commercial fishing grounds for San Pedro in the year 2012.

本数据集隶属于Point 97的一项题为“建立基线并评估加利福尼亚南海岸商业渔业的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基线监测项目（California South Coast Marine Protected Area Baseline Monitoring Project）的组成部分，旨在表征自海洋保护区（Marine Protected Area, MPA）实施以来南海岸区域的生态与社会经济状况及其变化。南海岸研究区域北起康塞普西翁角（Point Conception），南至加利福尼亚州与墨西哥边境。本数据集包含2013年夏季开展的渔业测绘访谈所采集的数据，访谈对象为2012年在圣佩德罗（San Pedro）有龙虾笼渔获上岸记录的商业渔民。访谈期间，渔民被要求绘制其2012年的捕捞海域分布图，并通过将100枚便士分配至各捕捞海域的方式，确定各捕捞海域的相对重要性。随后，通过聚合流程整合这些访谈获取的空间数据：将每位渔民给出的加权捕捞海域，再依据其2012年龙虾笼渔业的船上交货价收入（ex-vessel revenue）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，则依据加利福尼亚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年该渔业的总船上交货价收入为权重，对港口级数据进行聚合。本数据集表征了2012年圣佩德罗地区龙虾笼商业捕捞海域的空间范围与相对价值。