Fish abundance in the San Francisco Estuary (1959-2021), an integration of 9 monitoring surveys.

The San Francisco Estuary (SFE) is simultaneously a central hub of water delivery in California and home to commercially important and endangered fishes, such as Chinook Salmon, Green Sturgeon, and Delta and Longfin Smelt. Extensive ecological monitoring has been conducted for over 50 years, mainly under the auspices of the Interagency Ecological Program for the San Francisco Estuary (https://iep.ca.gov/). We integrated fish catch and length data from 9 long-term monitoring surveys in the SFE. The integrated database contains survey-level data such as environmental variables and sampling effort in addition to the fish-level species, lengths, and counts. Zero catches have been filled in for any species not caught in a sample. The geographic scope includes San Francisco Bay through the upper estuary, and the timeseries spans 1959 to 2021. Sampling methods, gear, fish length metric, and other factors differ among the component surveys. Sampling designs (locations and temporal frequency) have also changed over time. Thus, it is highly recommended to inspect the documentation of the component surveys for more information on their methods.

旧金山河口（San Francisco Estuary, SFE）既是加州输水系统的核心枢纽，也是多种兼具商业开发价值与濒危保护等级的鱼类的栖息地，其中包括奇努克鲑鱼（Chinook Salmon）、绿鲟（Green Sturgeon）以及三角洲胡瓜鱼（Delta Smelt）和长鳍胡瓜鱼（Longfin Smelt）。该区域已开展了超过50年的系统性生态监测工作，主要由旧金山河口跨机构生态项目（Interagency Ecological Program for the San Francisco Estuary，https://iep.ca.gov/）牵头实施。本研究整合了SFE范围内9项长期监测调查的渔获量与体长数据。该整合数据库不仅包含鱼类层面的物种信息、体长数据与个体数量统计，还涵盖了调查层面的环境变量及采样努力量等信息。对于单次采样中未捕获的物种，数据库均补填了零渔获记录。数据集的地理覆盖范围涵盖旧金山湾至河口上游区域，时间序列跨度为1959年至2021年。各子调查的采样方法、渔具类型、鱼类体长度量标准及其他相关参数均存在差异，采样设计（采样点位与时间频率）也随时间推移发生了调整。因此，强烈建议使用者查阅各子调查的文档，以获取其采样方法的详细信息。