The combined wild and hatchery Chinook salmon escapement In addition, 237 fish or 1.4% of the wild run were identified as fall Chinook Stock composition estimates were 3,723 fish for the upper Salmon River 2,016 fishįor the Middle Fork Salmon River 4,758 fish for the South Fork Salmon River 5,634 fish for theĬlearwater-Grande Ronde-Imnaha River aggregate and 111 fish for the Lower Snake Was nearly equal at the beginning of the run but became increasingly male-biased as the run Genetic assay, we estimate 6,169 females and 10,310 males returned. Ranging from zero to two years and saltwater age ranging from one to four years. Total age at spawning ranged from three to six years, with freshwater age For Chinook salmon between March 2 andĪugust 17, 2009, wild escapement was estimated to be 16,479 fish or 14.8% of the total run. Hatchery origin, of which 13.0% were unclipped. We estimate that 153,106 of these fish were of The combined wild and hatchery steelhead escapement was 178,870 fish counted at the Salmon River aggregate 2,223 fish for the Middle Fork Salmon River 947 fish for the Southįork Salmon River 2,844 fish for the upper Clearwater River 2,746 fish for the South ForkĬlearwater River 1,836 fish for the lower Clearwater River 1,863 fish for the Imnaha River ĥ,936 fish for the Grande Ronde River and 1,115 fish estimated to originate from below theĭam. Stock composition estimates were 6,254 fish for the main The sex ratio wasįemale-biased for the entire run. Genetic assay, we estimate 17,127 females and 8,637 males returned. Total age at spawning ranged from three to seven years, with freshwater age rangingįrom one to five years and saltwater age ranging from one to three years. To decompose each run by origin, body size (steelhead only), age, gender, and genetic stock.įor steelhead between Jand June 30, 2009, wild escapement was estimated to beĢ5,764 fish or 14.4% of the total run. Used a combination of window counts and systematic biological samples from the adult fish trap Spring-summer Chinook salmon returning to Lower Granite Dam during spawn year 2009. This report summarizes the abundance and composition of wild adult steelhead and

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