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Evaluation Of Fishway Modifications To Improve Passage Of Adult Chinook Salmon And Steelhead Through The Transition Pool At Lower Granite Dam 2006
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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 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 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 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 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 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 Advances in Fish Passage Technology by : Mufeed Odeh
Download or read book Advances in Fish Passage Technology written by Mufeed Odeh and published by . This book was released on 2000 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Migration of Adult Chinook Salmon and Steelhead Past Dams and Through Reservoirs in the Lower Snake River and Into Tributaries - 1992; Evaluation of Passage of Adult Salmon and Steelhead at Lower Granite Dam and of Electronic and Underwater Video Technologies as Passage Evaluation Methods by :
Download or read book Migration of Adult Chinook Salmon and Steelhead Past Dams and Through Reservoirs in the Lower Snake River and Into Tributaries - 1992; Evaluation of Passage of Adult Salmon and Steelhead at Lower Granite Dam and of Electronic and Underwater Video Technologies as Passage Evaluation Methods written by and published by . This book was released on 1994 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the upstream migration of adult spring and summer chinook salmon Oncorhynchus tshawytscha and steel head 0. mykiss past the four lower Snake River dams, through the reservoirs, and into the tributaries of the Snake River drainage was initiated in 1991 and continued in 1992 and 1993. The objectives were to evaluate the effect of spill, powerhouse operation, and flows on the rates of passage of the fish at the dams, migration through the reservoirs, the fishway entrances used, fallback at the dams, and movements into the tributaries upstream from the reservoirs.
Book Synopsis Evaluation of Fishway Designs for Downstream Passage of Spring Chinook Salmon and Steelhead Trout Smolts, 1987 Final Report by :
Download or read book Evaluation of Fishway Designs for Downstream Passage of Spring Chinook Salmon and Steelhead Trout Smolts, 1987 Final Report written by and published by . This book was released on 1988 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stress response of chinook salmon and steelhead trout smolts to passage through three different flumes was tested by assaying plasma cortisol concentrations before and after flume passage. In addition, descaling of fish was recorded before and after flume passage, and the ability of the flumes to pass adult chinook salmon and debris was determined. The three flumes were a corrugated metal flume (CMF), a 4- foot wide baffled flume (BF4), and a 2-foot wide baffled flume (BF2). Each flume was tested under conditions: 1) at night, 2) during the day with a perforated metal cover, which reduced the amount of light entering the flume by about half (partially darkened), and 3) during the day with the perforated cover and additional double layer of black plastic (completely darkened). Plasma cortisol concentrations were not significantly elevated in chinook salmon smolts after passage through any of the flumes (P>0.2, ANOVA). In daytime tests of partially and completely darkened flumes cortisol concentrations were consistently decreased following flume passage. We attribute this to pre-test stress (holding of fish in small tanks) and to the absence of a strong stress response to flume passage. Flume design did not have a significant effect on cortisol concentrations (P=0.9). Total darkening of the flumes during daytime was beneficial: cortisol concentrations were lower (P=0.03) in chinook salmon smolts passing through completely darkened flumes than in smolts passing through partially darkened flumes. 16 refs., 15 figs.
Book Synopsis Effect of Flow on Performance and Behavior of Chinook Salmon in Fishways by : Clark S. Thompson
Download or read book Effect of Flow on Performance and Behavior of Chinook Salmon in Fishways written by Clark S. Thompson and published by . This book was released on 1970 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fishway Designs for Downstream Passage of Spring Chinook Salmon and Steelhead Trout Smolts, 1987 by : James L. Congleton
Download or read book Evaluation of Fishway Designs for Downstream Passage of Spring Chinook Salmon and Steelhead Trout Smolts, 1987 written by James L. Congleton and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Feasibility of Documenting and Estimating Adult Fish Passage at Large Hydroelectric Facilities in the Snake River Using Video Technology by :
Download or read book The Feasibility of Documenting and Estimating Adult Fish Passage at Large Hydroelectric Facilities in the Snake River Using Video Technology written by and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovations in Fish Passage Technology by : Mufeed Odeh
Download or read book Innovations in Fish Passage Technology written by Mufeed Odeh and published by . This book was released on 1999 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Odeh (Conte Anadromous Fish Research Center) presents 13 contributions which explore the technical possibilities of constructing effective fish bypass systems for hydroelectric dams, especially those that are due for relicensing in the context of new regulations. The articles consist of case studies in the effectiveness of such techniques as surface bypass systems, modular inclined screens, hydroacoustic evaluation of fish entrainment patterns, surface collection, surface spill gates, and radio-tagging and radar tracking behavior evaluation strategies. Annotation c. Book News, Inc., Portland, OR (booknews.com).
Book Synopsis Calaveras River Fish Migration Barriers Assessment Report: Appendices A-E by : Fish Passage Improvement Program (Calif.)
Download or read book Calaveras River Fish Migration Barriers Assessment Report: Appendices A-E written by Fish Passage Improvement Program (Calif.) and published by . This book was released on 2007 with total page 302 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 Lower Snake River Juvenile Salmon Migration Feasibility Report/environmental Impact Statement: Chapters 1-4 by :
Download or read book Lower Snake River Juvenile Salmon Migration Feasibility Report/environmental Impact Statement: Chapters 1-4 written by and published by . This book was released on 2002 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
