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Creator:: Schoning, Robert W., Johnson, Donald R., and Oregon. Fish Commission
Abstract:: A study was undertaken in the fall of 1948 by the Oregon Fish Commission to determine the possible presence and importance of a delay in the migration of adult chinook salmon (Oncorhynchus tshawytscha) at Bonneville Dam on the Columbia River. Approximately 650 chinook were captured, tagged, and released at the...
Resource Type:: Technical Report

Creator:: Whitmore, Cecil M. and Oregon. Fish Commission
Abstract:: An anemia of juvenile chinook salmon (Oncorhynchus tshawytscha) is described and stages of development separated by recognizable syndromes. A vitamin E-deficient diet of low rancidity produced a severe microcytic anemia with strong immature red cell response and granulocytosis occurring 2 to 4 weeks before a drop in hemoglobin and hematocrit...
Resource Type:: Technical Report

Creator:: Korn, Lawrence and Oregon. Fish Commission
Abstract:: 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. Objectives of the program were: (1) to obtain information on the timing of the various segments of the run; (2)...
Resource Type:: Technical Report

Creator:: Henry, Kenneth A. and Oregon. Fish Commission
Abstract:: Ages were determined for 65 fish from the 1947 run and for 287 fish from the 1949 run. In 1947 the percentage composition by age was as follows: 32.3 percent 3-year-old fish, 66.2 percent 4-year-old fish, and 1.5 percent 5-year-old fish. An approximate 95 percent confidence interval for the true...
Resource Type:: Technical Report

Creator:: Marr, John C. and Oregon. Fish Commission
Abstract:: Samples, consisting of scales, length and weight measurements, and sex determinations of chum, pink, and silver salmons, were taken from the commercial catch in the Columbia River in 1914. Five hundred eighteen chum scales were examined. All fish had gone to sea early in their first year; and 70.5 percent...
Resource Type:: Technical Report

Creator:: Rich, Willis H. (Willis Horton), 1885-1972 and Oregon. Fish Commission
Abstract:: In a paper now in press as a Bulletin of the U. S. Fish and Wildlife Services the writer has discussed the downward trend of the catch of Columbia River Chinook salmon since 1920 and has stated that the decline is doubtless an indication that the runs of this species...
Resource Type:: Technical Report

Creator:: Henry, Kenneth A. and Oregon. Fish Commission
Abstract:: Tillamook Bay chum salmon are caught commercially by gill-nets, both set and drift, and from 1928 through 1949 the landings have averaged 819,689 pounds per season. More chum salmon are caught on Tillamook Bay than on the rest of the Oregon coastal rivers combined. These fish enter the ocean only...
Resource Type:: Technical Report

Creator:: Brock, Vernon E. and Oregon. Fish Commission
Abstract:: The temperate water fisheries for albacore in the North Pacific seem to exploit somewhat similar segments of the respective populations present in the various localities. It is clear that in most of the exploited populations two or at most three year classes are highly dominant. In the California fishery from...
Resource Type:: Technical Report

Creator:: Oregon. Fish Commission and Cleaver, Fred C. (Frederick Charles), 1916-
Resource Type:: Technical Report

Creator:: Hirschhorn, George and Oregon. Fish Commission
Abstract:: Clatsop Beaches, characterized by flat beach-face slope (1:70) and small sandsize (0.2 mm.), have supported commercial and recreational fisheries for the razor clam (Siliqua patula) for many years. Tracing the linear growth of two year classes through more than one year following set led to a validation of the ring...
Resource Type:: Technical Report

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