Standardized quantitative approach

1
TAKE HOME MESSAGES

• Standardized quantitative approach
• common currency for a basin wide comparison of
  risks among stocks / ESUs
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2
TAKE HOME MESSAGES
Risks are great for all Columbia River Basin
ESUs l lt 1.0 9 of 11 ESUs Especially
at risk   Steelhead everywhere (3 ESUs l lt
0.9) Upper Columbia (chinook and steelhead)  
3
TAKE HOME MESSAGES
Good data are critical for risk
evaluation. Knowing the fraction of hatchery
fish in spawner counts (and their reproductive
rates) is critical to correctly evaluate risks
for wild fish.  
4
Another
Major improvements in l are needed 0-65
(10-15) How much improvement can we get from
specific actions? Harvest moratoria (1-30)
Lower Columbia Chinook Upper Willamette
Chinook Snake River Fall Chinook Habitat,
hatcheries, ocean, hydro-system uncertain
5
Last One
Uncertainty about likely outcome of actions in
all arenas is NOT an argument for inaction.
NOW, we need to start large-scale management
experiments in conjunction with effective
monitoring programs. Some of these experiments
may fail, but if properly designed we can learn
from our mistakes.