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NORTHERN PIKEMINNOW MANAGEMENT PROGRAM. PROJECT 199007700. PREDATOR CONTROL PROGRAM SUMMARY. Listed as Project Recommendation under Future Needs. Based on sound science and in-depth knowledge. Potential consequence of stopping unacceptable. BACKGROUND. JOHN DAY RESERVOIR (1983-86).
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NORTHERN PIKEMINNOW MANAGEMENT PROGRAM PROJECT 199007700
PREDATOR CONTROL PROGRAM SUMMARY Listed as Project Recommendation under Future Needs Based on sound science and in-depth knowledge Potential consequence of stopping unacceptable
BACKGROUND JOHN DAY RESERVOIR (1983-86) Northern Pikeminnow Consumed 1.4 m Juvenile Salmonids Annually Were Responsible for 78% of Predation Predation Increased With Size 10-20% Exploitation = 50% Reduction in Predation
BACKGROUND SYSTEM-WIDE (1990-92) Predation Relative to John Day Reservoir Below Bonneville Dam = 800% Lower Columbia Reservoirs = 325% Lower Snake River Reservoirs = 40% Loss to Predation = 8% of Population
Year Catch % Year Catch %
Year Catch % Year Catch %
Year Catch % Year Catch %
Year % Year %
SYSTEM-WIDE (1990-92) Below Bonneville Dam = 800% Lower Columbia Reservoirs = 325% Lower Snake River Reservoirs = 40% Loss to Predation = 8% of Population
Compensation Evaluation: (Consumption, Growth, Mortality, etc.) Northern Pikeminnow None Smallmouth Bass None Walleye None
PLANS 80%
PLANS 3%
12% 17% PLANS
PLANS 5%
CLOSING THOUGHTS NPPC AUDIT 2000 COST EFFECTIVE THOROUGH EVALUATION
NORTHERN PIKEMINNOW MANAGEMENT PROGRAM PROJECT 199007700