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Evaluate juvenile salmon residence in the Columbia River Plume using micro-acoustic transmitters John Ferguson, et al. Riverine Ecology Program NWFSC,

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Presentation on theme: "Evaluate juvenile salmon residence in the Columbia River Plume using micro-acoustic transmitters John Ferguson, et al. Riverine Ecology Program NWFSC,"— Presentation transcript:

1 Evaluate juvenile salmon residence in the Columbia River Plume using micro-acoustic transmitters John Ferguson, et al. Riverine Ecology Program NWFSC, Seattle, WA

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3 Juvenile Chinook Distribution in the CR Plume

4 Ocean Conditions TrophicInteractions Salmon Abundance Distribution Growth MesoscaleSurvey Pacific Northwest Coastal Environment Plume Environment Strategy : Role Of Columbia River Plume on Salmon Productivity Direct Measurements & Modeling

5 Approach: collaborative team to downsize tag technology for subyearlings (92mm) -Columbia River estuary: -fixed and mobile detection systems -make survival estimates from Bonneville to mouth -delayed mortality; migration behavior -habitat selection -Lake Washington - urban estuary -Columbia River Plume - residence

6 Application Process: -characterize acoustic environment -model signal propagation -design detection system -set tag criteria -prototype test -full scale monitoring

7 micro-acoustic tag (proposed) Turbine tags: subyearling chinook smolt (92 mm) Radio tag, NMFS survival study, kHz PIT tag

8 Locks Fremont Cut Montlake Cut Lake Union Salmon Bay Shilshole Bay

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10 Plume study products: -Compare residence times -ocean- and stream-type chinook -early versus late migrants within a season -large versus small fish -Characterize fine-scale spatial use of frontal regions -Integrate with Project to understand how climate, ocean, and river forcing interact to affect survival

11 Summary : -apply micro-acoustic methodology to plume residence using fixed and mobile arrays -life history, seasonal, size differences -risks: adequate sample sizes; fixed array design; cost; detection range due to phase shift encoding *answer critical uncertainty of temporal and spatial use of plume habitat by juvenile salmon


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