Fintrol-5 was experimentally tested in six isolated gold dredge ponds in Sumpter Valley. The tests revealed all coarse fish in treated ponds were killed in a period varying between 7 hours and 144 hours; toxic water subbing from treated ponds would kill fish in downstream ponds if water table dillution...
In earlier years, the lower Owyhee River provided excellent trout angling. In recent years, the fishery had declined to one maintained with the annual stocking of legal size hatchery trout on a put and take basis. Stream surveys completed in 1966 indicated the 16 1/2-mile section of the lower river...
Fish passing Winchester Dam view-window counting station on the North Umpqua River were enumerated. Figure 1 is a map of the Umpqua basin and denotes the counting station. The counts for summer steelhead, fall chinook, and sea-run cutthroat increased while those for winter steelhead, spring chinook, and coho decreased. By...
Opossum shrimp, Mysis relicta Loven, were collected at Upper Waterton Lake, Alberta, Canada in the summer of 1967, terminating a three-year project. Approximately 1,090,000 Mysis were transplanted into Big Cultus, Crescent, Detroit, Fourmile, Ice, Miller, Odell, Olive, Timothy, Waldo, and Wallowa Lakes in an attempt to enhance the quantity of...
Malheur Reservoir in Malheur County, Oregon, was chemically treated on October 11, 1962, to eliminate an abundant population of black crappie and a smaller population of finescale suckers and redsided shiners. A total of 1,100 gallons of liquid synergized rotenone (Pro-Noxfish) was used to establish a toxicity of 1.5 p.p.m....
The objective of the reservoir research project is to gather and assemble data concerning the game and rough fish populations in Round Butte, Prineville, and Ochoco Reservoirs to enable efficient management of the fisheries.
The project has been divided into three different jobs, and these are:
a. Job 1 -...
A view-window counting station was operated at the Pacific Power and Light Company's dam on the North Umpqua River at Winchester, Douglas County, Oregon. The fish passing the dam each season were enumerated by species, according to a statistical sampling program established at Oregon State University. The counter recorded the...
Opossum shrimp Mysis relicta were collected in Upper Waterton Lake, Alberta, Canada, in the summer of 1966 for the second successive year. Approximately 650,000 were collected and introduced into Waldo, Wallowa, Big Cultus, Crescent, and Timothy Lakes in Oregon.
The following projects were completed between July 1, 1965, and June 30, 1966, under the stream clearance segment of the State-wide Stream Improvement Program. The larger segments were initiated by requesting competitive bids with the contract for logjam removal awarded to the lowest acceptable bid. The smaller projects were undertaken...