(***WDFW Letterhead***)

2020 ESU/DPS Abundance Analysis (1. Prepared in support of GSRO’s 2020 State of the Salmon in Watersheds report.) (2. See methods here ***insert data.wa.gov url***.) (3. See raw data here ***insert data.wa.gov url***.)

Thomas Buehrens Senior Research Scientist Lower Columbia Science Unit Lead Science Division, Fish Program Washington Department of Fish & Wildlife 206-715-2551 [email protected]

Neala Kendall Research Scientist Statewide Quantitative Synthesis and Reporting Unit Science Division, Fish Program Washington Department of Fish & Wildlife 360-789-9950 [email protected]

1. ESU/DPS name: Lower Columbia River Coho ESU

2. Data Analysis date:

3. Trend Analysis summary statement:

4. Goal Analysis summary statement:

5. Data summary statement (availability, reliability, source):

6. Other comments:

Salmon, coho (Lower Columbia River ESU)

15000 Cispus River − early and late Coho salmon

Coweeman River − late Coho salmon

East Fork Lewis River − early and late Coho salmon

Elochoman River − late Coho salmon

Grays and Chinook Rivers − late Coho salmon

Kalama River − late Coho salmon

Lower Cowlitz River − late Coho salmon 10000 Lower Gorge Tributaries − late Coho salmon

Mill, Abernathy, and Germany Creeks − late Coho salmon

North Fork Lewis River − early and late Coho salmon

North Fork Toutle River − early and late Coho salmon

Salmon Creek − late Coho salmon

South Fork Toutle River − early and late Coho salmon Natural Origin Spawner Abundance OriginNatural Spawner Tilton River − early and late Coho salmon 5000

Upper Cowlitz River − early and late Coho salmon

Upper Gorge Tributaries − late Coho salmon

Washougal River − late Coho salmon

0

2005 2010 2015 2020 SPAWNINGYEAR Salmon, coho (Lower Columbia River ESU)

Cispus River − early and late Coho salmon 0.050 0.025 0.000 −0.025 −0.050 2005 2010 2015 2020

Coweeman River − late Coho salmon

4000 3000 2000 1000 0 2005 2010 2015 2020

East Fork Lewis River − early and late Coho salmon

2000 1500 1000 500 0 2005 2010 2015 2020

Elochoman River − late Coho salmon

2000 Natural Origin Spawner Abundance OriginNatural Spawner

1000

0 2005 2010 2015 2020

Grays and Chinook Rivers − late Coho salmon

2000

1000

0 2005 2010 2015 2020 SPAWNINGYEAR Salmon, coho (Lower Columbia River ESU)

Kalama River − late Coho salmon 500 400 300 200 100 0 2005 2010 2015 2020

Lower Cowlitz River − late Coho salmon

15000 10000 5000 0 2005 2010 2015 2020

Lower Gorge Tributaries − late Coho salmon

750 500 250 0 2005 2010 2015 2020

Mill, Abernathy, and Germany Creeks − late Coho salmon 2000 1500 Natural Origin Spawner Abundance OriginNatural Spawner 1000 500 0 2005 2010 2015 2020

North Fork Lewis River − early and late Coho salmon 3000

2000

1000

0 2005 2010 2015 2020 SPAWNINGYEAR Salmon, coho (Lower Columbia River ESU)

North Fork Toutle River − early and late Coho salmon

4000 3000 2000 1000 0 2005 2010 2015 2020

Salmon Creek − late Coho salmon

2000 1500 1000 500 0 2005 2010 2015 2020

South Fork Toutle River − early and late Coho salmon 8000 6000 4000 2000 0 2005 2010 2015 2020

Tilton River − early and late Coho salmon

7500 Natural Origin Spawner Abundance OriginNatural Spawner 5000 2500 0 2005 2010 2015 2020

Upper Cowlitz River − early and late Coho salmon 8000 6000 4000 2000 0 2005 2010 2015 2020 SPAWNINGYEAR Salmon, coho (Lower Columbia River ESU)

Upper Gorge Tributaries − late Coho salmon

750 500 250 0 2005 2010 2015 2020

Washougal River − late Coho salmon

1000

500

0

Natural Origin Spawner Abundance OriginNatural Spawner 2005 2010 2015 2020

SPAWNINGYEAR Lower Columbia River Coho

Upper Gorge Tributaries − late Coho salmon

North Fork Lewis River − early and late Coho salmon

Coweeman River − late Coho salmon

Mill, Abernathy, and Germany Creeks − late Coho salmon

Lower Cowlitz River − late Coho salmon

South Fork Toutle River − early and late Coho salmon

Lower Gorge Tributaries − late Coho salmon

North Fork Toutle River − early and late Coho salmon

East Fork Lewis River − early and late Coho salmon

Elochoman River − late Coho salmon

Upper Cowlitz River − early and late Coho salmon

Washougal River − late Coho salmon

Kalama River − late Coho salmon

Grays and Chinook Rivers − late Coho salmon

0 100 200 5 Year Geomean % of Recovery Goal Lower Columbia River Coho

Upper Gorge Tributaries − late Coho salmon

Kalama River − late Coho salmon

Mill, Abernathy, and Germany Creeks − late Coho salmon

East Fork Lewis River − early and late Coho salmon

North Fork Lewis River − early and late Coho salmon

Lower Gorge Tributaries − late Coho salmon

Elochoman River − late Coho salmon

North Fork Toutle River − early and late Coho salmon

Lower Cowlitz River − late Coho salmon

Grays and Chinook Rivers − late Coho salmon

Coweeman River − late Coho salmon

South Fork Toutle River − early and late Coho salmon

Upper Cowlitz River − early and late Coho salmon

Washougal River − late Coho salmon

−5 −4 −3 −2 −1 0 Trend Since ESA Listing (% change per year)