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.

Endangered and Threatened Species DPS and ESU U.S. range for Steelhead and Salmon

Steelhead distinct population segment
Steelhead Oncorhynchus mykiss
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Southern California DPSEndangered (1997), (2006)[2]Endangered (2011)
South-Central California Coast DPSEndangered (1997), Threatened (2006)[3]Threatened (2011)
California Central Valley DPSThreatened (1998), (2006)[4]Threatened (2011)
Central California Coast DPSThreatened (1998), (2006)[5]Threatened (2011)
Northern California DPSThreatened (1998), (2006)[5]Threatened (2011)
Klamath Mountains Province DPS
Lower Columbia River DPSThreatened (1998), (2006)[6]Threatened (2011)
Middle Columbia River DPSThreatened (1999), (2006)[7]Threatened (2011)
Oregon Coast DPS
Puget Sound DPSThreatened (1997)[8]Threatened (2011)
Olympic Peninsula DPS
Snake River Basin DPSThreatened (1997), (2006) [9]Threatened (2011)
Southwest Washington DPS
Upper Columbia River DPSEndangered (1997), Threatened (2006), Endangered (2007), Threatened (2009)[10]Threatened (2011)
Upper Willamette River DPSThreatened (1999), (2006)[11]Threatened (2011)

Pacific salmon evolutionarily significant unit
Chinook salmon Oncorhynchus tshawytscha
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Central Valley Spring-run ESUThreatened (1995), (2005)[12]Threatened (2011)
Central Valley Fall-run and Late Fall-run ESU
California Coast ESUThreatened (1999), (2005)
including hatchery stocks[13]		Threatened (2011)
Oregon Coast ESU
Mid-Columbia River Spring-run ESU
Lower Columbia River ESUThreatened (1999), (2005)[6]Threatened (2011)
Deschutes River Summer/Fall-run ESU
Southern Oregon & Northern California Coastal ESU
Snake River Spring/Summer-run ESUThreatened (1992), (2005)[9]Threatened (2011)
Snake River Fall-run ESUThreatened (1992), (2005)[9]Threatened (2011)
Sacramento River Winter-run ESUThreatened (1989), (1990), Endangered (1992),
Threatened (2004), Endangered (2005)[14]		Endangered (2011)
Puget Sound ESUThreatened (1995), (2005)[8]Threatened (2001)
Washington Coast ESU
Upper Willamette River ESUThreatened (1999), (2005)[11]Threatened (2011)
Upper Klamath-Trinity Rivers ESU
Upper Columbia River Summer/Fall-run ESU
Upper Columbia River Spring-run ESUEndangered (1999), (2005)[10]Endangered (2011)
Coho salmon Oncorhynchus kisutch
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Central California Coast ESUEndangered (1996), (2005)
including hatchery stocks[13]		Endangered (2011)
Lower Columbia River ESUThreatened (2005)[6]Threatened (2011)
Olympic Peninsula ESU
Oregon Coast ESU
Puget Sound/Strait of Georgia ESU
Southern Oregon/Northern California ESUThreatened (1997), (2005)[15] Threatened (2011)
Southwest Washington ESU
Sockeye salmon Oncorhynchus nerka
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Baker River ESU
Lake Pleasant ESU
Lake Wenatchee ESU
Okanogan River ESU
Ozette Lake ESUThreatened (1999), (2005)[16]Threatened (2011)
Quniault Lake ESU
Snake River ESUEndangered (1991), (2005)[9]Endangered (2011)
Chum salmon Oncorhynchus keta
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Columbia River ESUThreatened (1999), (2005)[6]Threatened (2011)
Hood Canal Summer-run ESUThreatened (1995), (2005)[8]Threatened (2001)
Pacific Coast ESU
Puget Sound/Strait of Georgia ESU
Pink salmon Oncorhynchus gorbuscha
DPS/ESU NameInitial/Revised statusCurrent statusBoundary Map[1]
Even-year ESU
Odd-year ESU

Notes
  1. "Species Boundaries Salmon and Steelhead". National Oceanic and Atmospheric Administration. Retrieved 2013-12-03.
  2. "ESA Threatened & Endangered Steehead". National Oceanic and Atmospheric Administration. 2022. Retrieved 2022-01-13.
  3. "South-Central/Southern California Coast Steelhead Recovery Planning Domain 5-Year Review: Summary and Evaluation of South-Central California Coast Steelhead Distinct Population Segment" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  4. "Central Valley Recovery Domain 5-Year Review: Summary and Evaluation of Central Valley Steelhead DPS" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  5. "North-Central California Coast Recovery Domain 5-Year Review: Summary and Evaluation of Central California Coastal Steelhead DPS Northern California Steelhead DPS" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  6. "5-Year Review: Summary & Evaluation of Lower Columbia River Chinook, Columbia River Chum, Lower Columbia River Coho, Lower Columbia River Steelhead" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  7. "5-Year Review: Summary & Evaluation of Middle Columbia River Steelhead" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-01.
  8. "5-Year Review: Summary & Evaluation of Puget Sound Chinook, Hood Canal Summer Chum, Puget Sound Steelhead" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  9. "5-Year Review: Summary & Evaluation of Snake River Sockeye, Snake River Spring-Summer Chinook, Snake River Fall-Run Chinook, Snake River Basin Steelhead" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  10. "5-Year Review: Summary & Evaluation of Upper Columbia River Steelhead, Upper Columbia River Spring-run Chinook" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  11. "5-Year Review: Summary & Evaluation of Upper Willamette River Steelhead and Upper Willamette River Chinook" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  12. "Central Valley Recovery Domain 5 Year Review: Summary and Evaluation of Central Valley Spring-run Chinook Salmon ESU" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  13. "North-Central California Coast Recovery Program 5-Year Review: Summary and Evaluation of California Coastal Chinook Salmon ESU, Central California Coast Coho Salmon ESU" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  14. "Central Valley Recovery Domain 5-Year Review: Summary and Evaluation of Sacramento River Winter-run Chinook Salmon ESU" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
  15. "Southern Oregon/Northern California Coast Recovery Domain 5-Year Review: Summary and Evaluation of Southern Oregon/Northern California Coast Coho Salmon ESU" (PDF). National Oceanic and Atmospheric Administrations. 2011. Retrieved 2013-12-03.
  16. "5-Year Review: Summary & Evaluation of Ozette Lake Sockeye" (PDF). National Oceanic and Atmospheric Administration. 2011. Retrieved 2013-12-03.
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