Interagency Ecological Program and US Fish and Wildlife Service: San Francisco Estuary Enhanced Delta Smelt Monitoring Program data, 2016-2023

The Enhanced Delta Smelt Monitoring Program (EDSM) was initiated by the U.S. Fish and Wildlife Service in 2016. EDSM focuses on providing real-time data to help managers respond to population patterns of Delta Smelt within the upper San Francisco Estuary, primarily by providing estimates of Delta Smelt distribution and abundance. The dataset can also be useful in evaluating habitat use and behavior patterns of this species and other fish species of interest. Sampling is done year round via Kodiak trawls and larval (“20-mm”) gear to sample Delta Smelt across most life stages. Sites are chosen via stratified random sampling. Over the course of a week, field crews sample between 18 and 41 random sites. A minimum of two tows are conducted at each site. All fish collected are identified (in the field when possible, in the lab for early life stages), measured, enumerated, and recorded. In addition to fish information, environmental data are collected for each sampling event.
For more information: https://www.fws.gov/lodi/juvenile_fish_monitoring_program/jfmp_index.htm

增强型三角洲胡瓜鱼监测计划（Enhanced Delta Smelt Monitoring Program，简称EDSM）由美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service）于2016年启动。该计划旨在提供实时数据，助力管理人员应对旧金山河口上游区域内三角洲胡瓜鱼的种群动态变化，核心产出为三角洲胡瓜鱼的分布与丰度估算数据。本数据集还可用于评估该物种及其他受关注鱼类的栖息地利用模式与行为特征。

采样工作全年开展，采用科迪亚克拖网与幼鱼（20毫米）采样网具，对三角洲胡瓜鱼的绝大多数生命阶段进行采样。采样点位通过分层随机抽样法选取，野外工作组每周会对18至41个随机点位开展采样，每个点位至少完成两次拖网采样。所有采集到的鱼类均会进行物种鉴定（现场条件允许时现场鉴定，早期生命阶段样本则在实验室完成鉴定）、体长测量、计数与记录。除鱼类相关信息外，每次采样事件还会同步收集环境数据。

更多信息请访问：https://www.fws.gov/lodi/juvenile_fish_monitoring_program/jfmp_index.htm