Juvenile Salmonid Emigration Monitoring in the Lower American River, California.

Overview Operation of rotary screw traps on the Lower American River is
part of a collaborative effort by the U.S. Fish and Wildlife
Service, Pacific States Marine Fisheries Commission, and the
California Department of Fish and Wildlife. The primary objectives
of the study are to collect data that can be used to estimate the
passage of juvenile fall-run Chinook Salmon Oncorhynchus
tshawytscha and to quantify the raw catch of steelhead
Oncorhynchus mykiss as well as winter, spring, and late fall runs
of Chinook Salmon. Secondary objectives of the trapping operations
focus on collecting biological data on juvenile salmonids and
gathering environmental data that will be used to develop models
that correlate environmental parameters with salmonid size,
temporal presence, abundance, and production. The data package contains seven datasets including: raw catch,
trap operation, environmental, and trap efficiency data. Raw Catch – Chinook Dataset This dataset covers ALL Chinook Salmon captured by the rotary
screw traps. This spreadsheet includes biological data on: 1)
unmarked fall-, spring-, and winter-run Chinook Salmon 2) marked
(adipose clipped OR "fin clip") hatchery origin Chinook
Salmon 3) recaptured marked fall-run (BBY OR "Pigment /
Dye", Photonic Dye, and VIE OR "Elastomer") Chinook
Salmon utilized in trap efficiency trials. Raw Catch – Steelhead Dataset This dataset covers ALL steelhead captured by the rotary screw
traps. This spreadsheet includes biological data on: 1) unmarked
(natural origin) steelhead 2) marked (adipose clipped OR "fin
clip") hatchery origin steelhead 3) recaptured marked
steelhead utilized in trap efficiency trials. Raw Catch – ByCatch Dataset This dataset provides biological data on ALL catch (EXCLUDING
Chinook Salmon or steelhead) captured by the rotary screw traps.
All catch in this table is of natural origin. Trap Operations Dataset This dataset provides trap operation data for each trap visit.
Specifically, it includes data on the visit type, trap functioning
status, start and end sampling dates and times, total revolutions
and instantaneous revolution speeds, livewell intake statuses,
debris data, and whether the catch associated for this record will
be include for juvenile production estimates. Environmentals Dataset This dataset covers environmental data collected at the rotary
screw traps. This spreadsheet includes turbidity (nephelometric
turbidity units), water velocity (meters per second), dissolved
oxygen (milligrams per liter), and water depth (centimeters). Trap Efficiency Summary Dataset This dataset provides a summary of each trap efficiency trial
conducted. It includes the release date and time, the length of
the test, the number of marked fish released and recaptured, and
whether the trial was included for juvenile production estimates. Trap Efficiency Release FL Dataset This dataset provides biological data on a subsample of released
fish utilized in trap efficiency trials.