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4/24/2017 Juvenile Salmon Ecology in the Lower Columbia River and Estuary: Tidal Freshwater Research Presented by Nichole K. Sather Northwest Power &

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Presentation on theme: "4/24/2017 Juvenile Salmon Ecology in the Lower Columbia River and Estuary: Tidal Freshwater Research Presented by Nichole K. Sather Northwest Power &"— Presentation transcript:

1 4/24/2017 Juvenile Salmon Ecology in the Lower Columbia River and Estuary: Tidal Freshwater Research Presented by Nichole K. Sather Northwest Power & Conservation Council Science to Policy Exchange Astoria, OR September 10, 2009

2 Project Collaborators
4/24/2017 Project Collaborators Pacific Northwest National Laboratory Gary Johnson, Nikki Sather, Amy Borde Oregon Department of Fish & Wildlife Christine Mallette, Tucker Jones, Adam Storch, Ruth Farr National Marine Fisheries Service David Teel, Paul Moran University of Washington John Skalski Fisheries Consultant Earl Dawley

3 Overview Study area Project goals and objectives
4/24/2017 Overview Study area Project goals and objectives Sandy River delta & vicinity Key findings: Fish community Salmon: genetics, size classes, diets Habitat characteristics Expanded sampling effort Background Preliminary data Direction for the future

4 Goal: Address critical uncertainties regarding tidal freshwater habitats and the early life history of salmon

5

6 Key Findings Salmon Non-Salmon Salmon occur in all habitats sampled
4/24/2017 Key Findings Salmon Non-Salmon Salmon occur in all habitats sampled Salmon are encountered throughout the year during all seasons Chinook Salmon are the most predominant salmon Common species: Threespine Stickleback Peamouth Northern Pikeminnow Sucker species Banded Killifish* Bluegill* Non-native Species

7 Genetic Stock Groups: Chinook Salmon
4/24/2017 Genetic Stock Groups: Chinook Salmon

8 4/24/2017 Size Distribution

9 Salmon Diet Composition
4/24/2017 Salmon Diet Composition

10 Habitat Conditions Plant community structure Substrate Elevation
4/24/2017 Habitat Conditions Plant community structure Substrate Elevation Hydrology

11 4/24/2017 May June August September

12 4/24/2017 Validation Is the SRD & vicinity representative of other tidal freshwater habitats? Is the expression of early life history strategies similar between various reaches within the tidal freshwater area of the LCRE?

13 Longview St. Helens

14 Length Frequency Distribution Chinook Salmon
4/24/2017 Length Frequency Distribution Chinook Salmon

15 Ongoing Work & Analyses
4/24/2017 Ongoing Work & Analyses Determining representativeness of sampling sites Linking salmon density and fish community structure to habitat attributes Genetic comparisons between sampling regions Pilot study for residence time of Chinook salmon during winter Associating salmon diet to prey availability Diet comparisons among salmon species Bioenergetics modeling: assess energetic constraints on fish growth

16 4/24/2017 Summary Addressing critical uncertainties in tidal freshwater encompasses multiple abiotic and biotic attributes. As we build our knowledge of salmon ecology in tidal freshwater, the data will be applied to ecosystem restoration prioritization and decision-making to identify actions and strategies to recover ESA listed stocks.

17 Acknowledgements BPA Field and Technical Support
Amanda Bryson, Mike Anderson, Chris Anderson, Shon Zimmerman, Ron Kauffman, Dave Nichols Project partners: ODFW, NOAA, UW, E. Dawley

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