Lower Columbia Objectives:

• Estimate annual abundance of natural spawners for the 8 populations in the Lower Columbia (map).
• Survey 30 sites or 30% of the coho spawning habitat in each Lower Columbia population.
• Continue long-term annual estimate of abundance index (peak count on standard surveys, in fish/mile) for selected areas.
• Evaluate straying and natural spawning by hatchery fish.
• Map the spatial and temporal distribution of spawners.
• Monitor threatened and endangered stocks.
• Monitor and assess abundance trends.
• Research and develop methodologies as needed.

Oregon Coast Objectives:

• Estimate annual abundance of natural spawners for the 24 populations on the Oregon Coast (map).
• Survey 20 sites or 20% of the coho spawning habitat in each population.
• Continue long-term annual estimate of abundance index (peak count on standard surveys, in fish/mile) for selected areas.
• Evaluate straying and natural spawning by hatchery fish.
• Map the spatial and temporal distribution of spawners.
• Monitor threatened and endangered stocks.
• Monitor and assess abundance trends.
• Research and develop methodologies.

To learn about ODFW's coho monitoring in southern Oregon and the northern California coast (SONCC) click here.