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Katopodis, C., A. J. Derksen and B. L. Christensen (1991). Assessment of two Denil fishways for passage of freshwater species. Pages 306 - 324 in J. Colt and R. J. White, eds. American Fisheries Society Symposium, Bethesda, Maryland (USA), American Fisheries Society Symposium.
Fish movements through two Denil fishways were assessed by means of traps at the fish exit (upstream end) of each facility. Located in the Canadian prairies, the Fairford (Manitoba) and Cowan (Saskatchewan) fishways are similar in design and operation. At Fairford, 8,871 fish representing 13 species were caught in the trap. White suckers Catostomus commersoni , walleyes Stizostedion vitreum , and saugers Stizostedion canadense made up 93.0% of the run. At Cowan fishway four species caught were white suckers, longnose suckers Catostomus catostomus , northern pike Esox lucius, and walleyes; 11,294 fish were trapped, although it was estimated that over 23,000 fish passed through the fishway. The size range of fish that passed through the fishways was 212-800 mm. The longest Denil fishway section negotiated was 9.5 m at a 12.6% slope. Headwater levels, water depths and water velocities were monitored. Although fish movements at both sites were likely obstructed by dams for several decades, all species present ascended the fishways readily.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/data_library/fisheries/fish_passage/katopodis2.html
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