Fish abundance in the San Francisco Estuary (1959-2024), an integration of 10 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
10 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 2024. 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）既是加州水资源输送的核心枢纽，也是多种兼具商业价值与濒危等级的鱼类的栖息地，涵盖奇努克鲑鱼（Chinook Salmon）、绿鲟（Green Sturgeon）、三角洲胡瓜鱼（Delta Smelt）与长鳍胡瓜鱼（Longfin Smelt）。该区域已开展超50年的大规模生态监测工作，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/）主办实施。研究团队整合了旧金山河口10项长期监测调查的渔获与体长数据，该整合数据库除包含鱼类层面的物种信息、体长数据与个体计数外，还涵盖了调查层面的环境变量与采样投入（sampling effort）。对于样本中未捕获的任一物种，均补充录入了零捕获记录。本次研究的地理范围覆盖旧金山湾至河口上游区域，时间序列跨度为1959年至2024年。由于各子调查项目在采样方法、采样器具、鱼类体长测量指标及其他相关参数上均存在差异，且采样设计（包括采样点位与时间频率）亦随时间推移发生了变动，因此强烈建议使用者查阅各子调查项目的官方文档，以获取其方法学的详细信息。