California Department of Fish and Game Klamath-Trinity Project Klamath Basin Chinook Salmon Spawning Escapement, Harvest and Age Composition Fish and Game.

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Presentation transcript:

California Department of Fish and Game Klamath-Trinity Project Klamath Basin Chinook Salmon Spawning Escapement, Harvest and Age Composition Fish and Game Commission March 7, 2012

Trinity River Hatchery Iron Gate Hatchery Klamath River Basin Eureka Crescent City

 Natural Escapement  Weir operations  Carcass surveys  Redd surveys  Dive counts  Hatchery Escapement  Direct counts of fish returning to basin hatcheries  In-river Harvest  Sport Angler Harvest  Creel census  Reward tag returns  Indian Net Harvest  Sub-sampling net catch Methods : 2011 Klamath River Basin Fall Chinook Run-size Estimates

Oregon Pacific Ocean Eureka Crescent City Klamath River SF Trinity Lewiston Dam Trin. River Hat. Iron Gate Dam Iron Gate Hat. Trinity River Salmon River Scott River Shasta River Bogus Cr. California Willow Creek Carcass survey Redd survey Dive counts 2011 Klamath River Basin Fall Chinook Escapement Monitoring Methods weir sites

Oregon Pacific Ocean Eureka Crescent City Klamath River SF Trinity Lewiston Dam Trin. River Hat. Iron Gate Dam Iron Gate Hat. Trinity River Salmon River Scott River Shasta River Bogus Cr. California Willow Creek 2011 Klamath River Basin Adult Fall Chinook Escapement 8,490 2, ,016 3,674 27,744 3,976 13,849 1,143 1,996 Total= 70,092 3,072 misc. Klam tribs

Oregon Pacific Ocean Eureka Crescent City Klamath River SF Trinity Lewiston Dam Trin. River Hat. Iron Gate Dam Iron Gate Hat. Trinity River Salmon River Scott River Shasta River Bogus Cr. California Willow Creek 2011 Klamath River Basin Grilse Fall Chinook Escapement 9,549 2,303 11,187 2,499 1,819 37,690 3,306 1, Total= 74,222

2011 natural area escapement = 47, Klamath River Basin Adult Fall Chinook Natural Area Escapement Estimates Klamath River Basin Adult Fall Chinook Natural Area Escapement Estimates

IGH=18,039 + TRH = 15, Klamath River Basin Fall Chinook Hatchery Estimates Klamath River Basin Fall Chinook Hatchery Estimates 2011= 33,760 (11,421 grilse and 22,339 adults)

Oregon Pacific Ocean Eureka Crescent City Klamath River SF Trinity Lewiston Dam Trin. River Hat. Iron Gate Dam Iron Gate Hat. Trinity River Salmon River Scott River Shasta River Bogus Cr. California Willow Creek 2011 Klamath River Basin Fall Chinook Harvest Monitoring Methods 2011 Klamath River Basin Fall Chinook Harvest Monitoring Methods Net and Sport harvest monitoring Ratio estimator Harvest rate (angler tag returns)

Total in-river harvest 41,835 fall Chinook (14,160 sport and 27,675 net) 2011 Klamath River Basin Fall Chinook Harvest Estimates 2011 Klamath River Basin Fall Chinook Harvest Estimates Adult Chinook harvest – tribal 26,353; sport 4, adult fall Chinook quotas – 7,900 sport and 34,800 tribal

Klamath River Basin Fall Chinook Net Harvest Estimates Klamath River Basin Fall Chinook Net Harvest Estimates 27,675 Tribal adult Chinook harvest allocation fish was not met

Klamath River Basin Fall Chinook Sport Harvest Estimates Klamath River Basin Fall Chinook Sport Harvest Estimates 4, Basin quota of 7,900 fall Chinook adults not met

Avg. run size = 122, run size = 188, Klamath River Basin Fall Chinook Run-size Estimates

California Department of Fish and Game Klamath River Basin Estimates Preliminary Findings: 1.The 2011 Klamath Basin fall Chinook run was the 8 th largest since Grilse (2 yr old Chinook) comprised 85,860 (45.5%) of the total run this year which is the highest total ever estimated in our data set. The number of grilse in 2011 are an important indicator of a strong year class, in this case brood year The “ floor” conservation escapement goal of 35,000 adult natural fall Chinook spawners was met this season. The conservation floor (35,000 – 40,700) has been met 3 of the last five years following a three year span of not meeting this objective.