Download or read book Fish Screen Efficiency and Effects of Screened and Unscreened Irrigation Canals on the Downstream Movement of Westslope Cutthroat Trout Juveniles in Skalkaho Creek Montana written by Ryan Alexander Harnish and published by . This book was released on 2007 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish screens were installed in three of seven irrigation canals that divert water from Skalkaho Creek, a tributary of the Bitterroot River, in 2003 to prevent the loss of fluvial-adfluvial westslope cutthroat trout to irrigation canal entrainment. A study conducted in 2003 and 2004 established that fish screens were effective at reducing the loss of adult and age-0 westslope cutthroat trout. The efficiency of fish screens at preventing the loss of age 1-4 juveniles, the effect of screening on age-0 westslope cutthroat trout downstream movements, and the magnitude of entrainment at unscreened canals remained unclear after this initial study. The goal of my study was to address these information gaps. Fish screens prevented the loss of about 82% of entrained juvenile westslope cutthroat trout and bull trout. About 69% of entrained juveniles exited the screened canals through the headgates, 14% were bypassed, 12% remained in the canals, and the fate of 5% remained unknown. Entrained fish took about 7 days to exit the screened canals. Fish screen efficiency, the route used by fish to exit, and the amount of time taken by fish to exit varied by canal.
Download or read book Entrainment Losses of Westslope Cutthroat Trout Into Screened and Unscreened Irrigation Canals on Skalkaho Creek Montana written by Steven Burton Gale and published by . This book was released on 2005 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Native Trout of Western North America written by Robert J. Behnke and published by Amer Fisheries Society. This book was released on 1992-01-01 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Designs of Traveling Screens to Collect Juvenile Fish written by U.S. Fish and Wildlife Service and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Irrigation Canals on Bonneville Cutthroat Trout and Other Fishes in the Smiths Fork Drainage of the Bear River Wyoming written by James J. Roberts and published by . This book was released on 2004 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Fisheries Evaluation of the Westside Ditch and Wapato Canal Fish Screening Facilities Spring 1989 written by and published by . This book was released on 1990 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bonneville Power Administration, the United States Bureau of Reclamation, and the Washington State Department of Ecology are funding the construction and evaluation of fish passage and protection facilities at irrigation and hydroelectric diversions in the Yakima River Basin, Washington State. The programs provide offsite enhancement to compensate for fish and wildlife losses caused by hydroelectric development throughout the Columbia River Basin, and they address natural propagation of salmon to help mitigate the impact of irrigation in the Yakima River Basin. The Westside Ditch and Wapato Screens are two of the juvenile screening facilities. This report evaluates the effectiveness of the screens facilities for intercepting and returning juvenile salmonids unharmed to the Yakima River from which they were diverted. We evaluated the effectiveness of new fish screening facilities in the Westside Ditch and Wapato Canal in south-central Washington State. The screen integrity tests indicated that test fish released in front of the screens could enter the canal behind the screens. The study emphasized salmonids. Test fish were steelhead Oncorhynchus mykiss smolts, spring chinook salmon O. tshawytscha smolts, and rainbow trout O. mykiss fry. Evaluations were conducted during typical spring flows in the diversion. 13 refs., 10 figs., 6 tabs.
