Presentation on theme: "Factors Limiting Columbia Gorge Chum Salmon US Fish and Wildlife Service Columbia River Fisheries Program Office February 2002."— Presentation transcript:
Factors Limiting Columbia Gorge Chum Salmon US Fish and Wildlife Service Columbia River Fisheries Program Office February 2002
Chum had widest distribution of all Pacific salmon (~ 50% of annual biomass) Historic chum run in the early 1900s was ~1,400,000 By 1928, run size was ~700,000 adults In 1950s the run size had dropped to ~10,000 Since 1959, the population has been relatively stable with the annual minimum run size ranging from 300 to 5,700 Brief History
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