Juvenile Salmonid Monitoring in the Mainstem Trinity River, California, 2017
tr_outmigrant_monitoring_2017_final.pdf1.23 MB

This report presents juvenile salmonid emigration monitoring data collected in 2017 at both the Pear Tree rotary screw trap site (PTRST; river kilometer [rkm] 118) and the Willow Creek rotary screw trap site (WCRST; rkm 34) near Willow Creek, California, on the mainstem Trinity River. Information collected from this project contributes to assessing the effectiveness of the Trinity River Restoration Program’s habitat and flow management actions in restoring salmonid populations of the Trinity River. Monitoring at PTRST is conducted to estimate juvenile salmonid population size passing the site during the sampling season. Monitoring at WCRST is conducted to estimate juvenile salmonid population size and emigration timing during the monitoring period.

Author(s)
Publication date
Type of document
Annual Report
Facility
Photo of a foggy morning in the Trinity River Valley.
Arcata Fish and Wildlife Office
The Arcata Fish and Wildlife Office is a field office of the U.S. Fish and Wildlife Service. Our work in northern California includes scientific assessments, habitat restoration, and conservation of listed species.
Conservation Office
Arcata,CA
Media Usage Rights/License
Public Domain
Program
A man is fishing in a boat with three young girls. The kids are excitedly pulling a fish out of the water.
Healthy fisheries and waters are the foundation of America’s outdoor traditions and give us the freedom to fish, boat, and enjoy the benefits of outdoor recreation. The Fish and Aquatic Conservation programs work with states, tribes, and communities to provide a comprehensive approach to freshwater...
Program
Falls Church,VA
Species
A huge school of silver fishes swimming in a stream

ESA (NMFS) status: threatened (June 1997 - southern OR/northern CA population)

Coho salmon are a species of Pacific salmon which inhabit the Pacific coast in California, Oregon, Washington, British Columbia, and Alaska.  These fish are also known as silver salmon...

FWS Focus
Species
Kingdom
Animalia
Taxonomic Rank
Species
Steelhead are usually dark olive in color, shading to silvery white on the underside with a heavily speckled body and a pink-to-red stripe running along their sides.

Steelhead trout (Oncorhynchus mykiss) belong to the family Salmonidae which includes all salmon, trout, and chars. Steelhead are similar to some Pacific salmon in their life cycle and ecological requirements. They are born in fresh water streams, where they spend their first 1-3 years of life....

FWS Focus
Species
Kingdom
Animalia
Taxonomic Rank
Species
FWS and DOI Region(s)
Pacific Southwest