Current Catch Juvenile Unclipped Steelhead
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
Juveniles Space/Time Summary Queries
Query Notes
- Juvenile Monitoring and Sampling Metadata
- The current size and cumulative catch are updated daily with data as they are made available. The predicted total shows variability during the monitoring season at each location based on historical observations, but will converge to the actual catch total as the historical percent converges to 100%. New data are available daily to biweekly, depending on monitoring location. The predicted run size and cumulative catch are updated with the most current data and with the historical average percentage (min/max range) of the cohort.
- 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.