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Survival Estimates For The Passage Of Juvenile Salmonids Through Snake River Dams And Reservoirs 1994 Annual Report
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Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1994 Annual Report by :
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1994 Annual Report written by and published by . This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1994, the National Marine Fisheries Service and the University of Washington completed the second year of a multi-year study to estimate survival of juvenile salmonids (Oncorhynchus spp.) passing through the dams and reservoirs of the Snake River. Actively migrating smolts were collected at selected locations above, at, and below Lower Granite Dam, tagged with passive integrated transponder (PIT) tags, and released to continue their downstream migration. Survival estimates were calculated using the Single-Release, Modified Single-Release, and Paired-Release Models.
Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1994 by : William D. Muir
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1994 written by William D. Muir and published by . This book was released on 1995 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survival Estimates for the Passage of Spring-migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2005 by :
Download or read book Survival Estimates for the Passage of Spring-migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2005 written by and published by . This book was released on 2006 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Survival Estimates for the Passage of Spring-Migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2003-2004 Annual Report by :
Download or read book Survival Estimates for the Passage of Spring-Migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2003-2004 Annual Report written by and published by . This book was released on 2004 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: For juvenile chinook salmon Oncorhynchus tshawytscha, sockeye salmon O. nerka, and steelhead O. mykiss that migrate through reservoirs, hydroelectric projects, and free-flowing sections of the Snake and Columbia Rivers, survival estimates are essential to develop effective strategies for recovering depressed stocks. Many management strategies were based on estimates of system survival (Raymond 1979; Sims and Ossiander 1981) derived in a river system considerably different from today's (Williams and Matthews 1995; Williams et al. 2001). Knowledge of the magnitude, locations, and causes of smolt mortality under present passage conditions, and under conditions projected for the future, are necessary to develop strategies that will optimize smolt survival during migration. From 1993 through 2002, the National Marine Fisheries Service (NMFS) and the University of Washington (UW) demonstrated the feasibility of using three statistical models to estimate survival of PIT-tagged (Prentice et al. 1990a) juvenile salmonids passing through Snake River dams and reservoirs (Iwamoto et al. 1994; Muir et al. 1995, 1996, 2001a, 2003; Smith et al. 1998, 2000a, b; Hockersmith et al. 1999; Zabel et al. 2001, 2002). Evaluation of assumptions for these models indicated that all were generally satisfied, and accurate and precise survival estimates were obtained. In 2003, NMFS and UW completed the eleventh year of the study. Flow levels during the early portion of the 2003 spring migration were similar to 2002, and only slightly higher than in the drought conditions during 2001. However, flow levels were much greater during the later part of the migration in 2003. Spill levels were similar to 2002, much higher than in 2001. Research objectives were to: (1) estimate reach survival and travel time in the Snake and Columbia Rivers throughout the yearling chinook salmon and steelhead migrations; (2) evaluate relationships between survival estimates and migration conditions; and (3) evaluate the performance of the survival-estimation models under prevailing operational and environmental conditions. Additionally, as adult return information becomes available, as part of this study we will evaluate relationships between juvenile survival and subsequent adult returns for fish with different juvenile migration histories.
Book Synopsis A Psalter and Hours Executed Befor 1270 for a Lady Connected with St.Louis,... by :
Download or read book A Psalter and Hours Executed Befor 1270 for a Lady Connected with St.Louis,... written by and published by . This book was released on 1905 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1996 by : Steven Glen Smith
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake River Dams and Reservoirs, 1996 written by Steven Glen Smith and published by . This book was released on 1996 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 1998 Annual Report by :
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 1998 Annual Report written by and published by . This book was released on 2000 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides reach survival and travel time estimates for PIT-tagged hatchery and wild juvenile steelhead and yearling chinook salmon in the Snake and Columbia Rivers during 1998. Estimates of post-detection bypass survival for yearling chinook salmon at McNary Dam are also reported. Results are reported primarily in the form of data tables and figures with minimal description of methods and analysis. Detailed information on the methodology and statistical models used for this report is provided in five previous annual reports on this study, which are cited here.
Book Synopsis Lower Snake River Juvenile Salmon Migration Feasibility Report by :
Download or read book Lower Snake River Juvenile Salmon Migration Feasibility Report written by and published by . This book was released on 2002 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proposed Recovery Plan for Snake River Salmon by :
Download or read book Proposed Recovery Plan for Snake River Salmon written by and published by . This book was released on 1995 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 1999 Annual Report by :
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 1999 Annual Report written by and published by . This book was released on 2000 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rolle für die Gesellen des Bäckeramts zu Wismar von 1750 by : Wismar
Download or read book Rolle für die Gesellen des Bäckeramts zu Wismar von 1750 written by Wismar and published by . This book was released on 1832 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survival Estimates for the Passage of Yearling Chinook Salmon and Steelhead Through Snake River Dams and Reservoirs, 1995 Annual Report by :
Download or read book Survival Estimates for the Passage of Yearling Chinook Salmon and Steelhead Through Snake River Dams and Reservoirs, 1995 Annual Report written by and published by . This book was released on 1996 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documentation is provided for the third of a multiyear study to estimate the survival of juvenile salmonids passing through dams and reservoirs on the Snake River.
Book Synopsis Survival Estimates for the Passage of Juvenile Chinook Salmon Through Snake River Dams and Reservoirs, 1993 Annual Report by :
Download or read book Survival Estimates for the Passage of Juvenile Chinook Salmon Through Snake River Dams and Reservoirs, 1993 Annual Report written by and published by . This book was released on 1994 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pilot study was conducted to estimate survival of hatchery-reared yearling chinook salmon through dams and reservoirs on the Snake River. The goals of the study were to: (1) field test and evaluate the Single-Release, Modified-Single-Release, and Paired-Release Models for the estimation of survival probabilities through sections of a river and hydroelectric projects; (2) identify operational and logistical constraints to the execution of these models; and (3) determine the usefulness of the models in providing estimates of survival probabilities. Field testing indicated that the numbers of hatchery-reared yearling chinook salmon needed for accurate survival estimates could be collected at different areas with available gear and methods. For the primary evaluation, seven replicates of 830 to 1,442 hatchery-reared yearling chinook salmon were purse-seined from Lower Granite Reservoir, PIT tagged, and released near Nisqually John boat landing (River Kilometer 726). Secondary releases of PIT-tagged smolts were made at Lower Granite Dam to estimate survival of fish passing through turbines and after detection in the bypass system. Similar secondary releases were made at Little Goose Dam, but with additional releases through the spillway. Based on the success of the 1993 pilot study, the authors believe that the Single-Release and Paired-Release Models will provide accurate estimates of juvenile salmonid passage survival for individual river sections, reservoirs, and hydroelectric projects in the Columbia and Snake Rivers.
Book Synopsis Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2002-2003 Annual Report by : Steven G. Smith
Download or read book Survival Estimates for the Passage of Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2002-2003 Annual Report written by Steven G. Smith and published by . This book was released on 2003 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2002, the National Marine Fisheries Service and the University of Washington completed the tenth year of a study to estimate survival and travel time of juvenile salmonids (Oncorhynchus spp.) passing through dams and reservoirs on the Snake and Columbia Rivers. All estimates were derived from detections of fish tagged with passive integrated transponder tags (PIT tags). We PIT tagged and released a total of 19,891 hatchery steelhead at Lower Granite Dam. In addition, we utilized fish PIT tagged by other agencies at traps and hatcheries upstream from the hydropower system and sites within the hydropower system. PIT-tagged smolts were detected at interrogation facilities at Lower Granite, Little Goose, Lower Monumental, McNary, John Day, and Bonneville Dams and in the PIT-tag detector trawl operated in the Columbia River estuary. Survival estimates were calculated using a statistical model for tag-recapture data from single release groups (the ''Single-Release Model''). Primary research objectives in 2002 were to (1) estimate reach and project survival and travel time in the Snake and Columbia Rivers throughout the migration period of yearling chinook salmon O. tshawytscha and steelhead O. mykiss; (2) evaluate relationships between survival estimates and migration conditions; and (3) evaluate the survival-estimation models under prevailing conditions. This report provides reach survival and travel time estimates for 2002 for PIT-tagged yearling chinook salmon (hatchery and wild), hatchery sockeye salmon O. nerka, hatchery coho salmon O. kisutch, and steelhead (hatchery and wild) in the Snake and Columbia Rivers. Results are reported primarily in the form of tables and figures; details on methodology and statistical models used are provided in previous reports cited here. Results for summer-migrating chinook salmon will be reported separately.
Book Synopsis Return to the River by : Richard N. Williams
Download or read book Return to the River written by Richard N. Williams and published by Elsevier. This book was released on 2005-11-21 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Return to the River will describe a new ecosystem-based approach to the restoration of salmon and steelhead populations in the Columbia River, once one of the most productive river basins for anadromous salmonids on the west coast of North America. The approach of this work has broad applicability to all recovery efforts throughout the northern hemisphere and general applicability to fisheries and aquatic restoration efforts throughout the world. The Pacific Northwest is now embroiled in a major public policy debate over the management and restoration of Pacific salmon. The outcome of the debate has the potential to affect major segments of the region's economy - river transportation, hydroelectric production, irrigated agriculture, urban growth, commercial and sport fisheries, etc. This debate, centered as it is on the salmon in all the rivers, has created a huge demand for information. The book will be a powerful addition to that debate. A 15 year collaboration by a diverse group of scientists working on the management and recovery of salmon, steelhead trout, and wildlife populations in the Pacific Northwest Includes over 200 figures, with four-color throughout the book Discusses complex issues such as habitat degradation, juvenile survival through the hydrosystem, the role of artificial production, and harvest reform
Book Synopsis Survival Estimates for the Passage of Spring-Migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2005-2006 Annual Report by : Steven G. Smith
Download or read book Survival Estimates for the Passage of Spring-Migrating Juvenile Salmonids Through Snake and Columbia River Dams and Reservoirs, 2005-2006 Annual Report written by Steven G. Smith and published by . This book was released on 2006 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2005, the National Marine Fisheries Service and the University of Washington completed the thirteenth year of a study to estimate survival and travel time of juvenile salmonids Oncorhynchus spp. passing through dams and reservoirs on the Snake and Columbia Rivers. All estimates were derived from detections of fish tagged with passive integrated transponder tags (PIT tags). We PIT tagged and released a total of 18,439 hatchery steelhead, 5,315 wild steelhead, and 6,964 wild yearling Chinook salmon at Lower Granite Dam in the Snake River. In addition, we utilized fish PIT tagged by other agencies at traps and hatcheries upstream from the hydropower system and at sites within the hydropower system in both the Snake and Columbia Rivers. PIT-tagged smolts were detected at interrogation facilities at Lower Granite, Little Goose, Lower Monumental, Ice Harbor, McNary, John Day, and Bonneville Dams and in the PIT-tag detector trawl operated in the Columbia River estuary. Survival estimates were calculated using a statistical model for tag-recapture data from single release groups (the ''single-release model''). Primary research objectives in 2005 were: (1) Estimate reach survival and travel time in the Snake and Columbia Rivers throughout the migration period of yearling Chinook salmon O. tshawytscha and steelhead O. mykiss. (2) Evaluate relationships between survival estimates and migration conditions. (3) Evaluate the survival estimation models under prevailing conditions. This report provides reach survival and travel time estimates for 2005 for PIT-tagged yearling Chinook salmon (hatchery and wild), hatchery sockeye salmon O. nerka, hatchery coho salmon O. kisutch, and steelhead (hatchery and wild) in the Snake and Columbia Rivers. Additional details on the methodology and statistical models used are provided in previous reports cited here.
