http://hdl.handle.net/1957/21999 2013-05-18T10:32:14Z http://hdl.handle.net/1957/34475 Umpqua River smallmouth bass investigation, 1990 Daily, Kin; Oregon. Dept. of Fish and Wildlife "A study of smallmouth bass in the Umpqua River System was initiated in 1987 and continued in 1988. Results of that work were reported in a progress report. The study was continued in 1990 after a one-year lapse. This report summarizes results of the work conducted in 1990. Objectives of this portion of the study were: 1. Estimate exploitation of smallmouth bass in the Umpqua River. 2. Assess movement of smallmouth bass in the Umpqua River. 3. Obtain additional information about smallmouth bass predation on salmonids if the effort did not interfere with meeting objectives 1 and 2." (from the Introduction, p.1) 1990-01-01T00:00:00Z http://hdl.handle.net/1957/28051 Aerial photographic tracing of pulp mill effluent in marine waters Burgess, Fredrick J., 1926-; James, Wesley P.; Oregon State University; United States. Federal Water Quality Administration Aerial photography taken of waste plumes from Kraft pulp mill ocean outfalls was shown to be an effective tool in the study of waste disposal sites. This technique is not limited by sea conditions and permits monitoring and evaluation of outfall sites throughout the year. Photography taken at one instant provides comprehensive information throughout the waste field. Manpower requirements and costs for this method are considerably less than for conventional boat sampling surveys. Field studies were conducted on the waste plumes from Kraft pulp mill ocean outfalls at Newport and Gardiner, Oregon and Samoa, California. Waste concentrations were measured by conventional boat sampling techniques while aerial photography was taken of the outfall area from altitudes ranging from 3,000 to 11,000 ft. Computerized procedures were used to compute water currents, waste concentrations, toxicity zones and diffusion coefficients from the photography. The highest concentration measured directly over the outfalls was 2.3 percent waste by volume and the maximum area of influence with concentrations greater than 0.2 percent waste was 155 acres. The maximum concentration determined over the outfall for each field study was generally less than that shown to have a detrimental effect on young salmon for a 14-day exposure. Surface water current was found to be the dominant factor in the resulting plume pattern. During periods of low current velocities in the receiving water, the hydraulic head created by the effluent source was a significant factor in the resulting plume shape. The steady state form of the Fickian diffusion equation and unidirectional transport velocity was not applicable to the majority of the observations. Temperature was found not to be an effective tracer for tracking the plume or for estimating waste concentrations since the resulting plume temperature may be greater than, less than or equal to the surrounding ocean temperature. 1970-01-01T00:00:00Z http://hdl.handle.net/1957/26676 Pelagic Fisheries and Coastal Rivers Investigation : progress report, Coastal River section : July 1, 1966-June 30, 1967 Oregon. Pelagic Fisheries and Coastal Rivers Investigation; Oregon. Fish Commission. Research Division This report describes the activities of the Coastal Rivers Section, including spawning ground surveys, inventory and obstruction surveys, shad and striped bass landing data, lake rearing studies, the physical and chemical characteristics of south coastal streams and various salmonid rearing and ecological studies. 1970-01-01T00:00:00Z http://hdl.handle.net/1957/26435 Pelagic Fisheries and Coastal Rivers Investigation : progress report, Coastal River section : July 1, 1966-June 30, 1967 Oregon. Pelagic Fisheries and Coastal Rivers Investigation; Oregon. Fish Commission. Research Division "Activities included spawning ground and physical stream surveys, sampling of shad and striped bass commercial fisheries, population estimates of juvenile coho in selected streams, evaluating releases of adult and fry coho, studying coho in a lake environment, and investigations on the ecology of fall chinook in south coastal streams." (p.1) 1970-01-01T00:00:00Z