Download or read book Willamette River Salmon Studies written by Eugene M. Smith and published by . This book was released on 1985 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Willamette River Salmon Studies written by Timothy W. Downey and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Willamette River Salmon Studies written by Eugene M. Smith and published by . This book was released on 1988 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Willamette River Salmon Studies 1992 written by T. W. Downey and published by Cascade Geographic Society. This book was released on 1998-02-01 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Willamette River Salmon Studies McKenzie River Hatchery Evaluation written by Eugene M. Smith and published by . This book was released on 1983 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Willamette River Salmon Studies Marion Forks Hatchery Evaluation McKenzie River Hatchery Evaluation written by Eugene M. Smith and published by . This book was released on 1982 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rearing Spring Chinook Salmon in Willamette River Reservoirs written by Max Smith and published by . This book was released on 1976 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Managing the Columbia River written by National Research Council (U.S.). Committee on Water Resources Management, Instream Flows, and Salmon Survival in the Columbia River Basin and published by National Academy Press. This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book News, Inc., Portland, OR (booknews.com).

Download or read book Migratory Behavior of Adult Spring Chinook Salmon in the Willamette River and Its Tributaries written by and published by . This book was released on 1994 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Migration patterns of adult spring chinook salmon above Willamette Falls differed depending on when the fish passed the Falls, with considerable among-fish variability. Early-run fish often terminated their migration for extended periods of time, in association with increased flows and decreased temperatures. Mid-run fish tended to migrate steadily upstream at a rate of 30-40 km/day. Late-run fish frequently ceased migrating or fell back downstream after migrating 10-200 km up the Willamette River or its tributaries; this appeared to be associated with warming water during summer and resulted in considerable mortality. Up to 40% of the adult salmon entering the Willamette River System above Willamette Falls (i.e. counted at the ladder) may die before reaching upriver spawning areas. Up to 10% of the fish passing up over Willamette Falls may fall-back below the Falls; some migrate to the Columbia River or lower Willamette River tributaries. If rearing conditions at hatcheries affect timing of adult returns because of different juvenile development rates and improper timing of smolt releases, then differential mortality in the freshwater segment of the adult migrations may confound interpretation of studies evaluating rearing practices.

Download or read book Environmental Survey Report Pertaining to Salmon and Steelhead in Certain Rivers of Eastern Oregon and the Willamette River and Its Tributaries written by Oregon. Fish Commission. Research Division and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Survey Report Pertaining to Salmon and Steelhead in Certain Rivers of Eastern Oregon and the Willamette River and Its Tributaries written by Raymond A. Willis and published by . This book was released on 1960 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Survey Report Pertaining to Salmon and Steelhead in Certain Rivers of Eastern Oregon and the Willamette River and Its Tributaries Part 1 Survey Reports of Eastern Oregon Rivers written by Raymond A. Willis and published by . This book was released on 1960 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Releases of Coho Salmon Into the Upper Willamette River Oregon written by Ronald H. Williams and published by . This book was released on 1983 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Assessment and Enhancement of Fall Salmon Species in the Willamette River System written by Harold L. Hansen and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxygen Block in the Main stem Willamette River written by Frederic F. Fish and published by . This book was released on 1950 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Review of Adult Salmon and Steelhead Life History and Behavior in the Willamette River Basin written by Matthew L. Keefer and published by . This book was released on 2010 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The primary objective of this review is to compile and synthesize reported information on adult Pacific salmonids (Oncorhynchus spp.) relevant to their life history, migration, behavior, and survival in the Willamette River basin ... The presented material is intended to supplement the USACE's implementation strategy for the Willamette Project Biological Opinion (BiOp, NMFS 2008), which includes water management, fish passage, dam operation, water quality, hatchery program, and habitat components. While we conducted this review while considering the management actions presented in the BiOp's reasonable and prudent alternative (RPA), we generally used a biologically-based approach to identifying information gaps." -- Introduction, page 1.

Download or read book Migratory Characteristics of Spring Chinook Salmon in the Willamette River written by and published by . This book was released on 1993 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents our research to examine in detail the migration of juvenile and adult spring chinook salmon in the Willamette River. We seek to determine characteristics of seaward migration of spring chinook smolts in relation to oxygen supplementation practices at Willamette Hatchery, and to identify potential sources of adult spring chinook mortality in the Willamette River above Willamette Falls and use this information towards analysis of the study on efficiency of oxygen supplementation. The majority of juvenile spring chinook salmon released from Willamette hatchery in 1991 begin downstream movement immediately upon liberation. They travel at a rate of 1.25 to 3.5 miles per hour during the first 48 hours post-release. Considerably slower than the water velocities available to them. Juveniles feed actively during migration, primarily on aquatic insects. Na/K gill ATPase and cortisol are significantly reduced in juveniles reared in the third pass of the Michigan series with triple density and oxygen supplementation, suggesting that these fish were not as well developed as those reared under other treatments. Returning adult spring chinook salmon migrate upstream at an average rate of about 10 to 20 miles per day, but there is considerable between fish variation. Returning adults exhibit a high incidence of wandering in and out of the Willamette River system above and below Willamette Falls.