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Book Rearing Spring Chinook Salmon in Willamette River Reservoirs

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:

Book Willamette Reservoir System O M Continuation

Download or read book Willamette Reservoir System O M Continuation written by and published by . This book was released on 1980 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Natural Rearing of Spring Chinook Salmon in a Central Oregon Reservoir

Download or read book Natural Rearing of Spring Chinook Salmon in a Central Oregon Reservoir written by Duane L. Higley and published by . This book was released on 1963 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Spring Chinook Chapters

Download or read book Spring Chinook Chapters written by and published by . This book was released on 1998 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Willamette Spring Chinook Salmon

Download or read book Willamette Spring Chinook Salmon written by and published by . This book was released on 1996 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Migratory Behavior of Adult Spring Chinook Salmon in the Willamette River and Its Tributaries

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.

Book Salmon Culture January 1979 September 1988

Download or read book Salmon Culture January 1979 September 1988 written by Deborah T. Hanfman and published by . This book was released on 1989 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Northwest salmon enhancement program salmon interception

Download or read book Northwest salmon enhancement program salmon interception written by United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment and published by . This book was released on 1980 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Migratory Characteristics of Spring Chinook Salmon in the Willamette River

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.

Book Willamette River Temperature Control McKenzie Subbasin Oregon

Download or read book Willamette River Temperature Control McKenzie Subbasin Oregon written by United States. Office of the Assistant Secretary of the Army (Civil Works) and published by . This book was released on 1997 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Early Life History of Willamette River Spring Chinook Salmon

Download or read book Early Life History of Willamette River Spring Chinook Salmon written by Chester R. Mattson and published by . This book was released on 1962 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: