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Browsing Oregon Fish Commission Contributions by Title

Browsing Oregon Fish Commission Contributions by Title

Now showing items 22-29 of 29

The present state of the Columbia River salmon resources

Rich, Willis H. (Willis Horton), 1885-1972; Oregon. Fish Commission. Research Dept. (Salem, Or. : Department of Research, Fish Commission of the State of Oregon, 1941)

THE SALMON of the Columbia River have supported an intensive fishery for over seventy years but are now showing unmistakable signs of depletion, and various factors are contributing to the rapid progress of this condit ...
Salmon fisheries of the coastal rivers of Oregon south of the Columbia

Gharrett, John T.; Hodges, John I.; Oregon. Fish Commission (Portland, Or. : Oregon Fish Commission, 1950)

In spite of the progressive restrictions of the commercial river fishery during the past fifty years, the trend of the salmon populations of the coastal rivers has been downward. It is almost impossible to isolate and an ...
The salmon runs of the Columbia River in 1938

Rich, Willis H. (Willis Horton), 1885-1972; Oregon. Fish Commission (Salem, Or. : Department of Research, Fish Commission of the State of Oregon, 1942)

Exceptional data are available for the study of the salmon runs of the Columbia River in 1938. Detailed figures on catch were supplied by Oregon and Washington in such form that they could readily be combined with the co ...
Seasonal variations in weight of Columbia River chinook salmon

Rich, Willis H. (Willis Horton), 1885-1972; Oregon. Fish Commission (Salem, Or. : Department of Research, Fish Commission of the State of Oregon, 1940)

A study of the fishery problems raised by the construction of the Grand Coulee Dam on the upper Columbia River was done. Part of the study was to estimate the number of salmon taken in commercial fishery for the purpose ...
Some factors influencing the trends of salmon populations in Oregon

McKernan, Donald L. (Donald Lynn), 1918-1979; Johnson, Donald R.; Hodges, John I.; Oregon. Fish Commission (Portland, Or. : Oregon Fish Commission, 1950)

Three factors were found to be significantly correlated with the fluctuations and trends in silver salmon production in Oregon. Logging was found to adversely affect the runs of salmon in later years. Exceptional winte ...
Striped bass studies on Coos Bay, Oregon in 1949 and 1950

Morgan, Alfred R.; Gerlach, Arthur R.; Oregon. Fish Commission; Oregon. State Game Commission (Portland : Oregon Fish Commission, 1950)

1. There is no evidence of a decline in the striped bass population of Coos Bay. 2. The striped bass, a species introduced to the West Coast of North America, has been important as a recreational and commercial fish i ...
Tuberculosis in Pacific salmon and steelhead trout

Wood, James W.; Ordal, Erling Josef, 1906-; Oregon. Fish Commission (Portland, Or. : Fish Commission of Oregon, 1958-12)

Tuberculosis in salmonoid fishes was first observed in the 1952 run of fall chinook salmon (Oncorhynchus tshawytscha) returning to the Bonneville Hatchery of the Oregon Fish Commission. In the studies reported here, tube ...
A winter steelhead tagging program on the Columbia River

Korn, Lawrence; Oregon. Fish Commission (Portland, Or. : Fish Commission of Oregon, 1961)

The Oregon Fish Commission and Washington Department of Fisheries conducted a cooperative winter steelhead trout (Salmo gairdneri) tagging program on the Columbia River during the winters of 1954-55 and 1955-56. Objecti ...