Salmon & Steelhead Recovery Tracker

Coastal (Stratum)

The Coastal biogeographic stratum includes Lower Columbia watersheds in Oregon from the Youngs River to the Scappoose River. There are a total of 4 independent populations in the stratum.

Oncorhynchus kisutch

Abundance

Annual estimates of the abundance of naturally-produced spawners for each stratum.

Spawning Year Nat. Origin Abundance 95% Confidence Interval
2021 1,893 564
2020 1,662 1,152
2019 988 187
2018 261 164
2017 1,245 340
2016 1,878 665
2015 822 1,087
2014 5,496 1,086
2013 1,823 445
2012 1,367 252
2011 2,165 488
2010 3,993 1,185
2009 2,791 611
2008 1,729
2007 1,535
2006 1,439
2005 1,140
2004 1,414
2003 1,447
2002 1,178

Hatchery Proportion

Spawning Year Proportion Hatchery pHOS Comments
2021 No spawning ground surveys in Youngs Bay and Big Creek.
2020 No AUC estimate for independent populations due to significant budget reductions in 2020. Reliable population estimates were not possible due to the low number of survey sites. Abundance provided in 2020 are counts of fish passed at counting stations and spawning ground surveys in the Clatskanie population and Cascade Strata only.
2019 No surveys conducted in Youngs Bay and Big Creek.
2018 No surveys conducted in Youngs Bay and Big Creek.
2017 No surveys conducted in Youngs Bay and Big Creek.
2016 No surveys conducted in Youngs Bay and Big Creek.
2015 No surveys conducted in Youngs Bay and Big Creek.
2014 No surveys conducted in Youngs Bay and Big Creek.
2013 No surveys conducted in Youngs Bay and Big Creek.
2012 0.18
2011 0.19
2010 0.07
2009 0.31
2008 0.05
2007 0.15
2006 0.28
2005 0.25
2004 0.46
2003 0.42
2002 0.74