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Steelhead and salmon distinct population segments facts for kids

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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)
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South-Central California Coast DPS Endangered (1997), Threatened (2006) Threatened (2011)
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California Central Valley DPS Threatened (1998), (2006) Threatened (2011)
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Central California Coast DPS Threatened (1998), (2006) Threatened (2011)
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Northern California DPS Threatened (1998), (2006) Threatened (2011)
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Klamath Mountains Province DPS
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Lower Columbia River DPS Threatened (1998), (2006) Threatened (2011)
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Middle Columbia River DPS Threatened (1999), (2006) Threatened (2011)
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Oregon Coast DPS
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Puget Sound DPS Threatened (1997) Threatened (2011)
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Olympic Peninsula DPS
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Snake River Basin DPS Threatened (1997), (2006) Threatened (2011)
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Southwest Washington DPS
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Upper Columbia River DPS Endangered (1997), Threatened (2006), Endangered (2007), Threatened (2009) Threatened (2011)
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Upper Willamette River DPS Threatened (1999), (2006) Threatened (2011)
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Pacific salmon evolutionarily significant unit

Chinook salmon Oncorhynchus tshawytscha
DPS/ESU Name Initial/Revised status Current status Boundary Map
Central Valley Spring-run ESU Threatened (1995), (2005) Threatened (2011)
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Central Valley Fall-run and Late Fall-run ESU
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California Coast ESU Threatened (1999), (2005)
including hatchery stocks
Threatened (2011)
100px
Oregon Coast ESU
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Mid-Columbia River Spring-run ESU
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Lower Columbia River ESU Threatened (1999), (2005) Threatened (2011)
100px
Deschutes River Summer/Fall-run ESU
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Southern Oregon & Northern California Coastal ESU
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Snake River Spring/Summer-run ESU Threatened (1992), (2005) Threatened (2011)
100px
Snake River Fall-run ESU Threatened (1992), (2005) Threatened (2011)
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Sacramento River Winter-run ESU Threatened (1989), (1990), Endangered (1992),
Threatened (2004), Endangered (2005)
Endangered (2011)
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Puget Sound ESU Threatened (1995), (2005) Threatened (2001)
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Washington Coast ESU
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Upper Willamette River ESU Threatened (1999), (2005) Threatened (2011)
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Upper Klamath-Trinity Rivers ESU
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Upper Columbia River Summer/Fall-run ESU
100px
Upper Columbia River Spring-run ESU Endangered (1999), (2005) Endangered (2011)
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Coho salmon Oncorhynchus kisutch
DPS/ESU Name Initial/Revised status Current status Boundary Map
Central California Coast ESU Endangered (1996), (2005)
including hatchery stocks
Endangered (2011)
100px
Lower Columbia River ESU Threatened (2005) Threatened (2011)
100px
Olympic Peninsula ESU
100px
Oregon Coast ESU
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Puget Sound/Strait of Georgia ESU
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Southern Oregon/Northern California ESU Threatened (1997), (2005) Threatened (2011)
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Southwest Washington ESU
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Sockeye salmon Oncorhynchus nerka
DPS/ESU Name Initial/Revised status Current status Boundary Map
Baker River ESU
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Lake Pleasant ESU
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Lake Wenatchee ESU
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Okanogan River ESU
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Ozette Lake ESU Threatened (1999), (2005) Threatened (2011)
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Quniault Lake ESU
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Snake River ESU Endangered (1991), (2005) Endangered (2011)
100px
Chum salmon Oncorhynchus keta
DPS/ESU Name Initial/Revised status Current status Boundary Map
Columbia River ESU Threatened (1999), (2005) Threatened (2011)
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Hood Canal Summer-run ESU Threatened (1995), (2005) Threatened (2001)
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Pacific Coast ESU
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Puget Sound/Strait of Georgia ESU
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Pink salmon Oncorhynchus gorbuscha
DPS/ESU Name Initial/Revised status Current status Boundary Map
Even-year ESU
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Odd-year ESU
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