Salmon & Steelhead Recovery Tracker

Lower Columbia (ESU)

The Lower Columbia River Coho ESU includes all populations of coho salmon in the Columbia River and its tributaries in Washington and Oregon, from the mouth of the Columbia up to and including the Big White Salmon and Hood Rivers. It also includes the Willamette River to Willamette Falls.

The State of Oregon only monitors populations occurring in Oregon. There are eight recognized populations of coho in the Lower Columbia ESU, all of which are considered to be functionally independent. Lower Columbia coho were listed as threatened on June 28, 2005.

Oncorhynchus kisutch

Abundance

Annual estimates of the abundance of naturally-produced spawners.

Spawning Year Nat. Origin Spawners 95% Confidence Interval
2021 16,794 1,824
2020 15,749 2,060
2019 6,461 448
2018 4,080 322
2017 11,227 902
2016 4,897 865
2015 3,083 328
2014 22,512 3,218
2013 6,404 709
2012 4,377 940
2011 8,361 1,166
2010 7,794 1,649
2009 12,799 1,187
2008 4,992 918
2007 6,126 537
2006 6,425 665
2005 4,822 957
2004 5,627 663
2003 5,343 431
2002 4,026 982

Harvest

Fishing Year Harvest Rate
2021 10.4%
2020 6.5%
2019 19.3%
2018 14.6%
2017 10.8%
2016 8.9%
2015 24.4%
2014 16.4%
2013 14.3%
2012 14.0%
2011 11.1%
2010 10.7%
2009 18.7%
2008 7.3%
2007 20.8%
2006 14.6%
2005 17.9%
2004 20.1%
2003 25.0%
2002 18.0%
2001 29.8%
2000 35.2%
1999 26.7%
1998 15.7%
1997 13.9%
1996 10.7%
1995 22.7%
1994 6.7%

Hatchery Proportion

Spawning Year Proportion Hatchery
2021 0.11
2020 0.02
2019 0.05
2018 0.11
2017 0.10
2016 0.08
2015 0.09
2014 0.11
2013 0.16
2012 0.21
2011 0.18
2010 0.34
2009 0.26
2008 0.26
2007 0.18
2006 0.70
2005 0.42
2004 0.26
2003 0.20
2002 0.63

Marine Survival

Spawning Year Marine Survival Estimate
2021 17.4%
2020 6.1%
2019 3.9%
2018 5.8%
2017 7.7%
2016 6.0%
2015 2.5%
2014 16.4%
2013 5.4%
2012 7.2%
2011 11.6%
2010 8.6%
2009 10.3%
2008 6.4%
2007 2.6%
2006 2.7%
2005 5.2%
2004 6.0%
2003 10.9%
2002 8.9%
2001 9.3%
2000 4.0%
1999 1.6%
1998
1997
1996
1995
1994