EMPA 2021 Bruv Data

The overall goal of the Estuary Marine Protected Area (EMPA) Monitoring Program is to establish a monitoring framework, including data collection, analysis, synthesis, and reporting to determine the health of estuaries in California and the efficacy of MPA designation in estuaries. As part of the initial phases of the program, we developed standard protocols to assess key estuarine features across different estuaries, coupled with standard data templates and guidance on analysis, synthesis, and reporting, focused on four guiding principles: flexibility, comparability, interpretability, and practicality. We developed 14 SOPs and piloted the framework at 15 estuaries in 2021. For more details on the EMPA program and framework, see https://empa.sccwrp.org. This dataset includes the field collection data and video analysis for the Baited Remote Underwater Video (BRUV) data from SOP 8. Two to three GoPro cameras were deployed at each sampling station within an estuary for 2 hours. Each video was watched and every fish that passed through the frame of view was recorded to the lowest taxonomic level possible, as well as the time it entered and left the field of view. The MaxN (the maximum number of fish in a given frame regardless of species, e.g., if there were 3 bat rays and 2 mullets in the frame, then MaxN = 5) and MaxNs (the maximum number of fish in a given frame by species, e.g. if there were 3 bat rays and 2 mullets in the frame, then MaxNs = 3 for rays and MaxNs = 2 for mullet) was calculated for every unique frame with fish. For more details, see SOP 8 on https://empa.sccwrp.org. To simplify data usability, fields from both data and metadata tables have been combined to provide the user with a merged dataset. The metadata table is also included in standalone format.

河口海洋保护区（Estuary Marine Protected Area, EMPA）监测计划的总体目标是构建一套涵盖数据采集、分析、整合与报告的监测框架，用以评估加利福尼亚州河口的健康状况，以及河口区域海洋保护区（Marine Protected Area, MPA）设立的有效性。作为该计划初期阶段的工作内容，我们制定了用于跨河口评估关键河口特征的标准规程，配套了标准数据模板以及分析、整合与报告指南，核心遵循四大指导原则：灵活性、可比性、可解释性与实用性。我们共制定了14份标准作业程序（Standard Operating Procedure, SOP），并于2021年在15个河口开展了该框架的试点应用。如需了解EMPA计划与监测框架的更多细节，可访问https://empa.sccwrp.org。
本数据集包含来自标准作业程序8（SOP 8）的诱饵式远程水下视频（Baited Remote Underwater Video, BRUV）野外采集数据与视频分析结果。在河口内的每个采样站位部署2至3台GoPro摄像机，布设时长为2小时。对每段视频进行逐帧审阅，记录所有进入视野的鱼类至尽可能低的分类阶元，并记录其进入与离开视野的时间。针对每一个包含鱼类的独立帧，计算MaxN（单帧内出现的鱼类总最大数量，例如：若单帧内有3条鳐形目鱼类与2条鲻形目鱼类，则MaxN=5）与MaxNs（单帧内按物种划分的鱼类最大数量，例如上述场景中鳐类MaxNs=3、鲻类MaxNs=2）。如需了解更多细节，可查阅SOP 8相关内容，访问https://empa.sccwrp.org。
为简化数据的易用性，我们将数据表格与元数据表格的字段进行合并，为用户提供整合后的数据集。同时，元数据表格也以独立格式一并提供。