Shasta and Scott River Juvenile Salmonid Outmigrant Study, 2014 - Final Report
Author | Publisher | Year | Pages | Resource Type |
---|---|---|---|---|
Amy Debrick, Steven Stenhouse | CDFW | 01/08/2014 | 94 | PDF |
From January through June of 2014, rotary traps were operated on the Shasta and Scott rivers to produce weekly estimates of the number of all age classes of juvenile salmonids emigrating to the Klamath River. The Juvenile Salmonid Outmigrant Study is part of the ongoing Anadromous Fisheries Resource Assessment and Monitoring Program (AFRAMP) study on the Shasta and Scott Rivers in Siskiyou County, California. 2014 was the 15th consecutive year of this monitoring. Using methods described by Carlson et al. (1998), weekly trap efficiencies and population estimates were produced. . Established age-length cutoffs for each species were used to determine fish age. In-stream conditions such as flow and water temperature were also monitored. Weekly estimates for the smolt class of all species were compared to show multi-year population trends. Using Shasta River multi-year seasonal production estimates and coho salmon returning to the Shasta River, adult survival and smolt production estimates were calculated for Shasta River coho. It was estimated that for the period sampled in 2014, a total of 4,744,838 0+ Chinook, 304 1+ Chinook, 10,752 0+ coho, 850 1+ coho, 28,414 0+ steelhead, 908 1+ steelhead, 12,347 2+ steelhead, and 1,334 3+ steelhead emigrated from the Shasta River. It was estimated for this same sample period that 423,085 0+ Chinook, 760 1+ Chinook, 16,962 0+ coho, 5,708 1+ coho, 7,932 0+ steelhead, 145,605 1+ steelhead, 3,513 2+ steelhead, and 16 (actual number caught) 3+ steelhead emigrated from the Scott River.
Juvenile Salmon, Scott River, Shasta River, Monitoring, 2014