Species: Oncorhynchus mykiss pop. 12
Steelhead - Upper 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 - are now relatively rare (Behnke 2002).
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. Some of the oldest smolt ages for steelhead, up to seven years, are reported from this ESU; this may be associated with the cold stream temperatures; smolts are dominated by two-year-olds (see NMFS 1996).
Conservation Status
NatureServe Global Status Rank
G5T2Q
Global Status Last Reviewed
1997-11-06
Global Status Last Changed
1996-09-11
Other Status
LT - LT: Listed threatened - 2006-01-05
Distribution
Conservation Status Map
<img src="http://www.natureserve.org/explorer/servlet/GetMapGif?US.WA=SNR" alt="Conservation Status Map" style="width: 475px; height: auto;" />
Global Range
Columbia River basin upstream from the Yakima River, Washington, to the United States/Canada border (NMFS 1996).