"In January 1946 the Oregon State Game Commission authorized a study of Diamond Lake to determine reason for an apparent decline in the size and number of rainbow trout with the object of maintaining a maximum annual yield through proper management." (From Introduction)
South Twin Lake in Deschutes County, Oregon was chemically treated September 14, 1965, to eliminate a population of Tui Chub (Siphateles bicolor). A total of 605 gallons of liquid synergized rotenone and 9,750 pounds of powdered rotenone was applied to the lake. It was estimated that 130,000 mature chub were...
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 -...
The rainbow trout population in Elder Creek, Oregon was
studied between June 1965 and November 1966. The physical characteristics
of the stream during the summer season were described.
Rainbow trout were captured in each of three sections on the stream
by electrofishing and were tagged and measured. Population size,
mortality,...
Rainbow trout were fed semi-purified diets containing cyclopropenoid
fatty acids, and the biological effects of these acids were
investigated. These fatty acids occur naturally in cottonseed oil and
have been implicated in a large number of physiological disorders.
Included in this study was an investigation of the pattern of deposition...