Population estimate for natural area spawners (derived from mark/recapture methods) represents both naturally produced and hatchery produced adult fish and jacks (age 2 fish) which spawn naturally in the river. Data provided by California Department of Fish and Wildlife. Data are preliminary and subject to change.
Historical data from California Fish and Wildlife Plan (California Department of Fish and Game, 1965)
Coho salmon in the Trinity watershed — including the sub-watersheds of the Upper Trinity, Lower Trinity and South Fork Trinity — are state and federally listed as threatened. Spawning adult fish recovery targets represents the biological conditions National Marine Fisheries Service would use to delist the species and remove them from the Federal List of Endangered and Threatened Wildlife and Plants (50 CFR 223.102)(NMFS 2014). Total spawning target for Upper Trinity River (5,800), Lower Trinity River (3,600), and South Fork Trinity River (970) populations.
Chinook salmon and steelhead in the Trinity basin are not currently listed as endangered or threatened, so there are no recovery targets. The Trinity River Restoration Program Integrated Assessment Plan does have management objectives for naturally produced adult only fish in the Trinity River and its tributaries (TRRP, 2009). The coho management objective for naturally born adult only coho is 1,400.