Fisheries, Environmental, Economic and Management data and models for area-time-species abundance, location choice, and RERUM, 2008-2018, Alaska

This project presents an empirical modeling approach for predicting the economic and ecological consequences of alternative halibut PSC management policies. There are three modeling efforts represented: area-time-species abundance, Rational Expectations Random Utility Maximization (RERUM) Estimator, and RERUM Location Choice Data for the BSAI Groundfish Non-pollock Trawl Fleet. Fisheries, Environmental, Economic and Management data for model of area-time-species abundance. Bering Sea, Aleutian Islands and Golf of Alaska Areas. Daily data for specially defined areas. 2008-2018. Because of Research Workshop upload limits, output data is divided into two parts. AbundanceOutput_confidential_1.csv and AbundanceOutput_confidential_2.csv. These data should be combined rowise to use (append 2 on 1). Model input data and shapefiles are also provided. Modeling code for the Rational Expectations Random Utility Maximization (RERUM) estimator estimates the parameters of a spatiotemporal fishing behavior model that incorporates the dynamic and general equilibrium elements of fisheries with tradable short-term rights of annual catch entitlements. The RERUM estimator code is written in the MATLAB programming language. The RERUM location-choice model for the BSAI groundfish non-pollock trawl (i.e., the Amendment 80) fleet dataset is comprised of publicly available third-party data (e.g., species-specific TAC allocations), spatiotemporal estimates of CPUE (from our abundance model), and confidential data (e.g., location choices and harvests from the North Pacific observer program). Confidential data have been censored from the dataset.

本项目提出一种经验建模方法，用于预测各类替代性大比目鱼PSC管理政策的经济与生态影响。本研究包含三类建模工作：区域-时间-物种丰度模型、理性预期随机效用最大化 (Rational Expectations Random Utility Maximization, RERUM) 估计器，以及针对白令海-阿留申群岛渔场 (Bering Sea and Aleutian Islands, BSAI) 非鳕科拖网船队的RERUM选址选择数据集。区域-时间-物种丰度模型所用的渔业、环境、经济及管理数据，覆盖白令海、阿留申群岛及阿拉斯加湾海域，数据为针对特定划定区域的日度观测数据，时间跨度为2008年至2018年。受研究工坊上传限额限制，输出数据被拆分为两部分：AbundanceOutput_confidential_1.csv与AbundanceOutput_confidential_2.csv。使用时需按行合并这两份数据（将第二份追加至第一份之后）。本数据集同时提供模型输入数据与空间矢量文件 (shapefiles)。用于理性预期随机效用最大化 (RERUM) 估计器的建模代码，可拟合时空捕鱼行为模型的参数，该模型纳入了带有可交易年度捕捞配额短期权利的渔业的动态与一般均衡特征。RERUM估计器代码采用MATLAB编程语言编写。针对白令海-阿留申群岛渔场非鳕科拖网（即修正案80）船队的RERUM选址选择模型数据集，由三类数据构成：公开可得的第三方数据（如物种专属总可捕量 (Total Allowable Catch, TAC) 分配额度）、（源自本研究丰度模型的）单位捕捞努力量渔获量 (Catch Per Unit Effort, CPUE) 时空估计值，以及机密数据（如北太平洋观察员项目记录的选址选择与捕捞产量）。数据集中的机密内容已做脱敏处理。