Summer Townet Survey
Description / purpose
The Summer Townet Survey (STN) is a long-term effort to monitor young pelagic fishes in the upper San Francisco Estuary. Since 1959, STN has sampled locations from eastern San Pablo Bay to Rio Vista on the Sacramento River, and to Stockton on the San Joaquin River; and a single station in the lower Napa River. The study area was expanded in 2011 to include the Sacramento Deep Water Ship Chanel and Cache Slough. Currently, 40 stations are sampled as a survey every other week June through August for a total of 6 surveys. Fish sampling uses a conical, fixed-frame net, which is pulled obliquely through the water column 2 to 3 times at each station. Data collected at 31 stations are used to calculate annual relative abundance indices for age-0 Striped Bass (Morone saxatilis) and Delta Smelt (Hypomesus transpacificus). The remaining 8 stations are sampled to increase our understanding of juvenile fish abundance and distribution in the lower Napa River and the north Delta. Starting in 2005, a zooplankton net was added to assess fish food resources at each station and a subset of the fish collected are retained for diet analysis by CDFW researchers. Zooplankton sampling informs several management actions focused on Delta Smelt habitat improvements including collections of additional zooplankton samples for the Suisun Marsh Salinity Control Gate re-operation. Finally, the STN also measures environmental variables including water temperature, water clarity and specific conductivity. Managers and researchers use data collected by STN to inform decisions and improve and understand the health of the upper San Francisco Estuary.
Linked science activities
None specified
Collaborators
None specifiedActivity status
- 1 Awarded / Initiating (1959)
- 2 In progress / Ongoing (2009 - 2026)
- 3 Complete
Funding summary
Total allocated funding: $0
Location
Geographic tags
Products and outputs
| Type | Title | Description | Views |
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Summer Townet Survey website | URL for the IEP Summer Townet Survey | 1 |
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Summer Townet Survey Station Map | Station map for the Summer Townet survey | 1 |
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The Tow-Net Survey Abundance Index for Delta Smelt Revisited | This paper describes an evaluation of a new mid-su | 0 |
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Interagency Ecological Program (IEP) 2019 Work Plan and Funding | This Work Plan reflects the annuallyâ€planned | 1 |
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Quality Assurance Protocol California Department of Fish and Game Central Valley Bay Delta Branch, L | QA/QC protocol for the Summer Townet Survey | 0 |
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Summer Townet Survey data management plan | Data management plan for the IEP Summer Townet Sur | 0 |