Scientific conclusions of the status review for Oregon coast coho salmon (Oncorhynchus kisutch) Status review for Oregon coast coho salmon (Oncorhynchus kisutch)

"Coho salmon (Oncorhynchus kisutch) is a widespread species of Pacific salmon, spawning and rearing in rivers and streams around the Pacific Rim from Monterey Bay in California north to Point Hope, Alaska, through the Aleutians, and from the Anadyr River in Russia south to Korea and northern Hokkaido, Japan (Godfrey et al. 1975, Laufle et al. 1986). From central British Columbia south, the vast majority of coho salmon adults return to spawn as 3-year-olds, having spent approximately 18 months in freshwater and 18 months in saltwater (Gilbert 1912, Pritchard 1940, Sandercock 1991). The primary exceptions to this pattern are jacks, sexually mature males that return to freshwater to spawn after only 5 to 7 months in the ocean. West Coast coho salmon smolts typically leave freshwater in the spring (April to June) and when sexually mature reenter freshwater from September to November and spawn from November to December and occasionally into January (Sandercock 1991). Coho salmon spawning habitat consists of small streams with stable gravels. Summer and winter freshwater habitats most preferred by young salmon consist of quiet areas with low flow, such as backwater pools, beaver (Castor canadensis) ponds, dam pools, and side channels (Reeves et al. 1989)"--Introduction, paragraph 1. Heather A. Stout, Peter W. Lawson, Daniel L. Bottom, Thomas D. Cooney, Michael J. Ford, Chris E. Jordan, Robert G. Kope, Lance M. Kruzic, George R. Pess, Gordon H. Reeves, Mark D. Scheuerell, Thomas C. Wainwright, Robin S. Waples, Eric Ward, laurie A. Weitkamp, John G. Williams, and Thomas H. Williams. "June 2012." Also available online in PDF. Includes bibliographical references (pages 129-152). 2012 NMFS (National Marine Fisheries Service) NWFSC (Northwest Fisheries Science Center) Library Public Domain 1864