Download or read book Guiding Downstream Migrant Salmon and Steelhead Trout written by Paul E. Fields and published by . This book was released on 1956 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of a Louver Guidance Facility Used to Sample Salmon and Trout Emigrants written by Terry Holubetz and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this thesis is an evaluation of a louver facility in the Lemhi River, Idaho. The louver facility was designed to guide juvenile chinook salmon and steelhead trout into a trap in order to sample downstream migrant populations. The study was designed to determine: (1) if the catch in the louver facility was a reliable index of emigrant population size, and (2) if an accurate estimate of the number of emigrants could be obtained through a mark-and-recapture program utilizing louver catches. The louver guidance facility provided a reliable method of estimating numbers of salmon and steelhead smolts that were emigrating from the upper Lemhi River. The louver facility collected a consistent proportion of the migrating chinook salmon and steethead trout smolts from the Lemhi River. Approximately 3 percent of the chinook smolts and 21 percent of the steelhead smolts were captured in the trap. Estimates of smolt numbers for both species were derived by expanding the louver-captured proportion. During 1965, an estimated 325,020 chinook smolts and 9,830 steelhead smolts emigrated from the upper Lemhi River. No estimates could be made for chinook fry emigrants. An estimated 98.6 percent of the steelhead smolts entering the louver facility were guided into the trap. An estimated 83.6 percent of the chinook smolts were guided into the trap. The guiding efficiency for chinook fry was estimated to be 20.2 percent. The efficiency of the louver system was greatest for large migrants and for periods when water temperature was high. The upstream migration barrier guided some steelhead smolts into the louver facility but did not guide chinook smolts. The majority of the chinook smolts migrated in the center portion of the stream.

Download or read book Summary of Trapping of Downstream Migrant Steelhead Trout and Chinook Salmon at Wildhorse River Weir During 1959 written by Robert J. Bell and published by . This book was released on 1960 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Report on Migrant Salmon Light Guiding Studies Contract No D A 45 108 CIVENG 63 29 at Columbia River Dams for the Fisheries Engineering Research Program U S Army Engineer Division North Pacific Corps of Engineers written by Paul Eldon Fields and published by . This book was released on 1966 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summary of Trapping of Downstream Migrant Steelhead Trout and Chinook Salmon at Wildhorse River Weir During 1958 written by Robert J. Bell and published by . This book was released on 1959 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Report on Migrant Salmon Light Guiding Studies contract No D A 45 108 CIVENG 63 29 at Columbia River Dams written by Paul E. Fields and published by . This book was released on 1966 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fish Migration and Fish Passage written by Willis A. Evans and published by . This book was released on 1974 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Downstream Migration of Sockeye Salmon and Steelhead Trout Past Rock Island Dam 1990 written by Charles M. Peven and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Downstream Migration of Sockeye Salmon and Steelhead Trout Past Rock Island Dam 1992 written by Charles M. Peven and published by . This book was released on 1993 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Downstream Migrant Salmon Production in from the Cedar River and Bear Creek written by and published by . This book was released on 2006 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Salmon and Trout Migratory Behavior Symposium written by and published by . This book was released on 1982 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Environmental Tragedy written by California. Department of Fish and Game. Advisory Committee on Salmon and Steelhead Trout and published by . This book was released on 1971 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation and Monitoring of Wild natural Steelhead Trout Production Annual Progress Report January 1 1995 December 31 1995 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Several key study streams in the Salmon River and Clearwater River drainages were snorkeled in the summer of 1995. The current Idaho Department of Fish and Game (IDFG) goal is to maintain a parr density at 70% of the rated carrying capacity. All streams snorkeled are considerably below the current goal (6.4% to 54.3% of goal). Weirs were operated in Chamberlain Creek, West Fork Chamberlain Creek, Running Creek, and Rush Creek during the spring adult steelhead Oncorhynchus mykiss spawning migration. An adult steelhead migration barrier was operated in Rapid River. Adult steelhead escapements in all but Rapid River are at critically low levels. An adult salmon O. sp. weir was operated in Running Creek using a new passive electronic/video counting facility. Five adult chinook salmon O. tshawytscha were captured on video as they passed the counting facility. A video record of all resident fish in excess of 10 to 12 in was also obtained. The video system performed adequately in most circumstances. Additional testing and modification will continue during the 1996 salmon spawning migration. An upstream migration barrier was operated in Rapid River during the salmon spawning migration. Four adult male salmon were passed above the barrier; no females were captured or passed above the barrier. Rotary screw traps were operated in Running Creek and Rapid River during the spring and fall to monitor the juvenile steelhead and salmon downstream migration. Migration timing in Running Creek indicates that the majority of smolt size fish moved downstream out of Running Creek in the fall and few smolt size fish left Running Creek in the spring. Migration timing at Rapid River indicates a more equal distribution of the smolt size fish moving downstream out of Rapid River in the spring. 1 ref., 9 figs., 7 tabs.

Download or read book Saving the Salmon written by Lisa Mighetto and published by . This book was released on 1994 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Louvers and Bypass Facilities for Guiding Seaward Migrant Salmonids Past Mayfield Dam in Western Washington written by John S. Thompson and published by . This book was released on 1967 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catches of Downstream Migrating Chinook Salmon and Steelhead Trout in Barge Traps Below Brownlee Dam written by Robert J. Bell and published by . This book was released on 1960 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Problem of Guiding Downstream Migrant Salmon at Dams written by Frederick J. Andrew and published by . This book was released on 1955 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: