Central Valley Juvenile Salmonid Monitoring for Unmarked Older Juvenile Chinook, 8/1/2025 to 7/31/2026
Data Courtesy of USFWS, Lodi and USFWS, Red Bluff and California Department of Fish & Wildlife via CalFish and Pacific States Marine Fisheries Commission via CalFish
Sacramento River
Red Bluff Diversion Dam Rotary Screw Traps with CDEC Daily Average River Data
Tisdale Weir Rotary Screw Trap with Colousa (COL) Daily Average Flow
Lower Sacramento River
Knights Landing Rotary Screw Trap with Wilkins Slough (WLK) Daily Average Flow
Sacramento Trawls (@ Sherwood Harbor) with CDEC Daily Average
Verona, Elkhorn, Sand Cove, Miller Park, Sherwood Harbor, Discovery Park, American River, and Garcia Bend Beach Seines
Chipps Island Trawls
San Joaquin River
Mossdale Trawls with CDEC Daily Average River Data
Query Notes
- Juvenile Monitoring and Sampling Metadata
- Historically, the USFWS Red Bluff Fish and Wildlife Office used a Normal Linear Model to predict the daily combined capture efficiency of four 8’ diameter rotary screw traps (RSTs) for brood years 2004–2019 under an assumption of homogenous capture efficiencies among RSTs. USFWS developed new Binomial Generalized Linear Models to predict the daily capture efficiencies of four 5’ and one 8’ diameter RST individually for brood years 2020–present without an assumption of homogenous capture efficiencies of different RSTs. The new method accommodates flexible sampling with any number of 5’ and 8’ diameter RSTs and allows capture efficiencies to vary among different RSTs.
- Red Bluff Diversion Dam: Unmarked are unmarked, not mark-corrected.