Species: Oncorhynchus mykiss pop. 17
Steelhead - Middle Columbia River
Species
Encyclopedia of Puget Sound
Classification
Kingdom
Animalia
Phylum
Craniata
Class
Actinopterygii
Order
Salmoniformes
Family
Salmonidae
Genus
Oncorhynchus
NatureServe
Classification
Informal Taxonomy
Animals, Vertebrates - Fishes - Bony Fishes - Salmon and Trouts
Formal Taxonomy
Animalia - Craniata - Actinopterygii - Salmoniformes - Salmonidae - Oncorhynchus - pop 29).
Ecology and Life History
Short General Description
A fish (salmon).
Habitat Type Description
Freshwater
Migration
false - true - true - Migrates between freshwater breeding and marine nonbreeding habitats (as defined by NMFS 1996, this entity does not include nonanadromous forms). All steelhead in the Columbia River basin upstream from The Dalles Dam are inland summer-run steelhead; steelhead in Fifteenmile Creek, Oregon, are genetically allied with inland O. MYKISS but are winter-run; winter steelhead also occur in the Klickitat and White Salmon rivers, Washington (NMFS 1996).
Non-migrant
false
Locally Migrant
true
Reproduction Comments
First-time spawners generally are 4-5 years old. Individuals are capable of spawning more than once before they die, though spawning more than twice is rare. Steelhead eggs incubate 1.5-4 months before hatching (varies with temperature). Juveniles spend 1-4 (generally 2) years in fresh water before migrating to the ocean as smolts.
Conservation Status
NatureServe Global Status Rank
G5T2Q
Global Status Last Reviewed
1999-10-22
Global Status Last Changed
1999-10-22
Other Status
LT - LT: Listed threatened - 2006-01-05
Distribution
Conservation Status Map
<img src="http://www.natureserve.org/explorer/servlet/GetMapGif?US.OR=S2&US.WA=SNR" alt="Conservation Status Map" style="width: 475px; height: auto;" />
Global Range
Columbia River basin and tributaries from above the Wind River in Washington and the Hood River in Oregon (exclusive) to, and including, the Yakima River, in Washington, but not including the Snake River basin (NMFS 1999). The Deschutes River and Umatilla river hatchery stocks are not included in the Threatened listing (NMFS 1999). The John Day, Deschutes, and Yakima rivers supports the largest native, natural spawning stocks (NMFS 1999).