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Adult Salmon And Steelhead Passage Through Fishways And Transition Pools At The Dalles Dam 1997 2001
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Book Synopsis Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at The Dalles Dam, 1997-2001 by : Theodore C. Bjornn
Download or read book Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at The Dalles Dam, 1997-2001 written by Theodore C. Bjornn and published by . This book was released on 2007 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at Bonneville Dam, 1997-2002 by : Matthew L. Keefer
Download or read book Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at Bonneville Dam, 1997-2002 written by Matthew L. Keefer and published by . This book was released on 2008 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Evaluation of fishway entrance use and passage through fishways by spring–summer Chinook salmon Oncorhynchus tshawytscha, steelhead O. mykiss, and sockeye salmon O. nerka at Bonneville Dam were objectives of the adult salmon and steelhead passage project in 1997, 1998, 2000, 2001, and 2002. Critical parameters studied were times for a fish to first approach and first enter a fishway, total time to pass over the dam, which openings were approached, where fish entered and exited fishways, and fish passage through transition pools and over the dam. We report here on study results from five years of spring–summer Chinook salmon data, four years of steelhead data, and one year of sockeye salmon data."--From executive summary (page v).
Book Synopsis Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at John Day Dam, 1997-2001 by : Theodore C. Bjornn
Download or read book Adult Salmon and Steelhead Passage Through Fishways and Transition Pools at John Day Dam, 1997-2001 written by Theodore C. Bjornn and published by . This book was released on 2008 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2008 by : T. S. Clabough
Download or read book Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2008 written by T. S. Clabough and published by . This book was released on 2009 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Previous studies of Pacific salmon migration behaviors at Snake River dams indicated slow passage at transition pools in adult fishways. In 2001 and 2002, we conducted an experiment to evaluate if modified weirs affected adult salmon and steelhead passage times and route selection through the Lower Granite Dam transition pool. Attraction flows through weir orifices were experimentally manipulated using removable aluminum panels. Results from the 2001-2002 studies indicated a greater percentage of radiotagged spring–summer Chinook salmon passed straight through the transition pool and median transition pool passage times were significantly lower when the panels were deployed. Based on these results, the U.S. Army Corps of Engineers modified the fish ladder at Lower Granite Dam in 2006 prior to the migration season. Modifications included narrowing the transition pool and increasing the weir crest height of the lowest eleven weirs. To evaluate the effectiveness of the modifications, we radio-tagged and monitored adult spring-summer and fall Chinook salmon and steelhead as they passed Little Goose and Lower Granite dams and compared their performance to that measured during previous years without modifications in place. Transition pool passage times at Lower Granite Dam for spring-summer Chinook salmon were significantly faster in 2006 than in 2003 and 2004 (non-modified years). Spring-summer Chinook salmon passage times were also faster in 2008, though the results were not statistically different (P > 0.05) than in 2003 and 2004. The other runs exhibited similar, though not statistically different responses. The frequencies of downstream exits from the Lower Granite transition pool to the tailrace for spring Chinook salmon in 2006 and 2008 were lower than in 2003 and 2004. We also compared the difference in passage times by individual fish at Little Goose and Lower Granite dams in an effort to statistically control for interannual variation in river environment. Comparisons of interannual differences in passage times at the two dams indicated that passage times decreased for individual fish at Lower Granite Dam compared to Little Goose dam in modified years compared to the non-modified years. Passage times through the Lower Granite transition pool were also faster in 2006 and 2008 than in 2003 and 2004. However, the transition pool passage times were not as low as those achieved during the experimental weir modifications in 2001 and 2002 and passage behavior only improved for spring-summer Chinook salmon during 2008 with the permanent modification. This difference may have been caused by differences in river conditions among years, differences in fishway hydraulics between the experimental and permanent modifications, or both."--Abstract (page iii).
Book Synopsis Adult Steelhead Passage Through Fishways and Transition Pools at Bonneville, McNary, and Lower Granite Dams, 1996 by : Lowell C. Stuehrenberg
Download or read book Adult Steelhead Passage Through Fishways and Transition Pools at Bonneville, McNary, and Lower Granite Dams, 1996 written by Lowell C. Stuehrenberg and published by . This book was released on 2005 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Fishway Slope on Rate of Passage of Salmonids by : Joseph R. Gauley
Download or read book Effect of Fishway Slope on Rate of Passage of Salmonids written by Joseph R. Gauley and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study on the effect of fishway slope on rate of passage of salmonids was made by comparing passage time of fish in two fishways with different slopes. It is based mainly on steelhead (Salmo gairdneri) but includes some chinook (Oncorhynchus tshawytscha) and silver (Oncorhynchus kisutch) salmon. Both fishways were pool-and-overfall type in which 6 feet of elevation was gained. Passage of steelhead in the 1:8-slope fishway was in general, as fast as or faster than in the 1:16-slope fishway. In the 1:8-slope fishway, the passage time appeared to increase with an increase in rise between pools. In the 1:16-slope fishway, the passage time of steelhead increased as the season progressed.
Book Synopsis Passage of Adult Salmon and Trout Through Pipes by : Emil Slatick
Download or read book Passage of Adult Salmon and Trout Through Pipes written by Emil Slatick and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Passage of Radio-tagged Adult Salmon and Steelhead at John Day Dam with Emphasis on Fishway Temperatures, 1997-1998 by : Matthew L. Keefer
Download or read book Passage of Radio-tagged Adult Salmon and Steelhead at John Day Dam with Emphasis on Fishway Temperatures, 1997-1998 written by Matthew L. Keefer and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2006 by :
Download or read book Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2006 written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2006 by :
Download or read book Evaluation of Fishway Modifications to Improve Passage of Adult Chinook Salmon and Steelhead Through the Transition Pool at Lower Granite Dam, 2006 written by and published by . This book was released on 2007 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Water Temperature on Adult Salmon and Steelhead Passage and Behavior at Lower Granite Dam, 2008 by : T. S. Clabough
Download or read book Influence of Water Temperature on Adult Salmon and Steelhead Passage and Behavior at Lower Granite Dam, 2008 written by T. S. Clabough and published by . This book was released on 2009 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Previous studies have identified Lower Granite Dam fish ladder as having as high temperature differentials during summer months. In 2008, we monitored water temperatures within the fish ladder and the passage of radio-tagged adult salmonids at Lower Granite Dam. Water temperatures in the fish ladder were cooler than in previous study years, with only five percent or less of all radio-tagged fish passing the dam when water temperatures differences between upper and lower segments of the fishway exceeded 1 °C. The warmest average monthly temperatures occurred in August and differences in temperature between the top and bottom of ladder the ladder exceeding 1 °C occurred on one day in July and one day in October. A significantly higher percentage of spring-summer Chinook salmon (O. tshawytscha) exited the fish ladder to the tailrace when temperatures exceeded 18 °C than when water ladder temperatures were less than 18 °C. We did not find differences in the percent of steelhead (O. mykiss) and fall Chinook salmon that exited the ladder when temperatures were greater than or less than 18 °C. Median dam and transition pool passage times were higher for all runs of radio-tagged fish when water ladder temperatures exceeded 18 °C. Most tagged fish that exited the dam to the tailrace did so after reaching the transition pool area of the ladder regardless of temperature. We found a higher percentage of fish overnighted when water temperatures were greater than 18 °C. Since 2008 was a relatively cool year, future studies may be needed to more effectively evaluate the relationship between fish passage and temperature gradients within the fish ladder at Lower Granite Dam."--Abstract.
Book Synopsis Passage of Salmonoids Through a Darkened Fishway by : Clifford W. Long
Download or read book Passage of Salmonoids Through a Darkened Fishway written by Clifford W. Long and published by . This book was released on 1959 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Entrances Used and Passage Through Fishways for Adult Chinook Salmon and Steelhead, Part III of Final Report for Migration of Adult Chinook Salmon and Steelhead Past Dams and Through Reservoirs in the Lower Snake River and Into Tributaries by :
Download or read book Entrances Used and Passage Through Fishways for Adult Chinook Salmon and Steelhead, Part III of Final Report for Migration of Adult Chinook Salmon and Steelhead Past Dams and Through Reservoirs in the Lower Snake River and Into Tributaries written by and published by . This book was released on 1998 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of the Shad Fishery on Passage of Adult Chinook Salmon Through the Oregon-shore Fishway Ladder at The Dalles Dam--2002 by : Michael Anthony Jepson
Download or read book Effects of the Shad Fishery on Passage of Adult Chinook Salmon Through the Oregon-shore Fishway Ladder at The Dalles Dam--2002 written by Michael Anthony Jepson and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Migration Patterns of Adult Salmon and Steelhead in the Forebay of Bonneville Dam, 1997 by : Theodore C. Bjornn
Download or read book Migration Patterns of Adult Salmon and Steelhead in the Forebay of Bonneville Dam, 1997 written by Theodore C. Bjornn and published by . This book was released on 1998 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 1997 Annual Fish Passage Report by : United States. Army. Corps of Engineers. North Pacific Division
Download or read book 1997 Annual Fish Passage Report written by United States. Army. Corps of Engineers. North Pacific Division and published by . This book was released on 1998* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adult Chinook and Sockeye Salmon and Steelhead Fallback Rates at the Dalles Dam, 1996, 1997, and 1998 by :
Download or read book Adult Chinook and Sockeye Salmon and Steelhead Fallback Rates at the Dalles Dam, 1996, 1997, and 1998 written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
