Steelhead and salmon distinct population segments

The National Oceanic and Atmospheric Administration, in cooperation with the U.S. Fish and Wildlife Service and Environmental Protection Agency, groups steelhead and salmon into distinct population segments (DPS). There are currently 15 DPS for steelhead (Oncorhynchus mykiss) and 31 evolutionarily significant units (ESU) for five species of Pacific salmon Oncorhynchus. The boundaries of these areas are used to determine whether specific populations of a species should be designated threatened or endangered species under the Endangered Species Act.

Steelhead distinct population segment Steelhead Oncorhynchus mykiss DPS/ESU Name Initial/Revised status Current status Boundary Map Southern California DPS Endangered (1997), (2006) Endangered (2011) South-Central California Coast DPS Endangered (1997), Threatened (2006) Threatened (2011) California Central Valley DPS Threatened (1998), (2006) Threatened (2011) Central California Coast DPS Threatened (1998), (2006) Threatened (2011) Northern California DPS Threatened (1998), (2006) Threatened (2011) Klamath Mountains Province DPS Lower Columbia River DPS Threatened (1998), (2006) Threatened (2011) Middle Columbia River DPS Threatened (1999), (2006)Threatened (2011) Oregon Coast DPS Puget Sound DPS Threatened (1997) Threatened (2011) Olympic Peninsula DPS Snake River Basin DPS Threatened (1997), (2006) Threatened (2011) Southwest Washington DPS Upper Columbia River DPS Endangered (1997), Threatened (2006), Endangered (2007), Threatened (2009) Threatened (2011) Upper Willamette River DPS Threatened (1999), (2006) Threatened (2011)

Pacific salmon evolutionarily significant unit

Chinook salmon Oncorhynchus tshawytscha DPS/ESU Name Initial/Revised status Current status Boundary MapCentral Valley Spring-run ESUThreatened (1995), (2005) Threatened (2011) Central Valley Fall-run and Late Fall-run ESU California Coast ESUThreatened (1999), (2005) including hatchery stocks Threatened (2011) Oregon Coast ESU Mid-Columbia River Spring-run ESU Lower Columbia River ESUThreatened (1999), (2005) Threatened (2011) Deschutes River Summer/Fall-run ESU Southern Oregon & Northern California Coastal ESU Snake River Spring/Summer-run ESUThreatened (1992), (2005) Threatened (2011) Snake River Fall-run ESUThreatened (1992), (2005) Threatened (2011) Sacramento River Winter-run ESUThreatened (1989), (1990), Endangered (1992), Threatened (2004), Endangered (2005) Endangered (2011) Puget Sound ESUThreatened (1995), (2005) Threatened (2001) Washington Coast ESU Upper Willamette River ESUThreatened (1999), (2005) Threatened (2011) Upper Klamath-Trinity Rivers ESU Upper Columbia River Summer/Fall-run ESU Upper Columbia River Spring-run ESUEndangered (1999), (2005) Endangered (2011) Coho salmon Oncorhynchus kisutch DPS/ESU Name Initial/Revised status Current status Boundary Map Central California Coast ESUEndangered (1996), (2005) including hatchery stocks Endangered (2011) Lower Columbia River ESUThreatened (2005) Threatened (2011) Olympic Peninsula ESU Oregon Coast ESU Puget Sound/Strait of Georgia ESU Southern Oregon/Northern California ESUThreatened (1997), (2005)Threatened (2011) Southwest Washington ESU Sockeye salmon Oncorhynchus nerka DPS/ESU Name Initial/Revised status Current status Boundary Map Baker River ESU Lake Pleasant ESU Lake Wenatchee ESU Okanogan River ESU Ozette Lake ESUThreatened (1999), (2005)Threatened (2011) Quniault Lake ESU Snake River ESUEndangered (1991), (2005) Endangered (2011) Chum salmon Oncorhynchus keta DPS/ESU Name Initial/Revised status Current status Boundary Map Columbia River ESUThreatened (1999), (2005) Threatened (2011) Hood Canal Summer-run ESUThreatened (1995), (2005) Threatened (2001) Pacific Coast ESU Puget Sound/Strait of Georgia ESU Pink salmon Oncorhynchus gorbuscha DPS/ESU Name Initial/Revised status Current status Boundary Map Even-year ESU Odd-year ESU

Notes