Population Trends and Extinction Risks for 12 ESA Listed Salmonid ESUs in the Columbia River Basin

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S T E E L H E A D
Upper Willamette
Snake River
Upper Columbia
Mid Columbia
Lower Columbia
CHUM
Upper Willamette
Snake River Fall
C H I N O O K
Snake River Spr/Sum
Upper Columbia
Lower Columbia
0.00
0.20
0.40
0.60
0.80
1.00
Probability of 90 decline in 24 years for wild
fish in the presence of wild spawning hatchery
fish