Species: Oncorhynchus mykiss pop. 14
Steelhead - Lower 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 27).
Ecology and Life History
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).
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
2000-11-29
Global Status Last Changed
2000-11-29
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
This ESU includes all naturally spawned populations of steelhead and their progeny in streams and tributaries to the Columbia River between the Cowlitz and Wind rivers, Washington, inclusive, and the Willamette and Hood rivers in Oregon, inclusive (NMFS 1998); does not include steelhead in the upper Willamette River Basin above Willamette Falls and steelhead from the Little and Big White Salmon rivers in Washington (NMFS 1996). Nonbreeding range: eastern Pacific Ocean.