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Creator:: Gharrett, John T., Hodges, John I., and Oregon. Fish Commission
Abstract:: 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 analyze separately the causes of this decline, and any attempt to saddle one factor...
Resource Type:: Technical Report
Full Text:: THE COLUMBIA JOHN T. GHARRE1T AND JOHN I. HODGES OREGON FISH COMMISSION PORTLAND, OREGON

Creator:: McKernan, Donald L. (Donald Lynn), 1918-1979, Johnson, Donald R., Hodges, John I., and Oregon. Fish Commission
Abstract:: 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 winter floods seem to produce poor resulting runs. Low summer water flows also appear to produce lower...
Resource Type:: Technical Report
Full Text:: OREGON Donald L McKernan, Donald R. Johnson, and John I. Hodges (Reprinted from Transactions of the

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
Full Text:: JOHN C. MARR (Stanford Ichthyological Bulletin, Vol. 2, No. 6, pages 157-197. 1943.) Contribution No

Creator:: Marriage, Lowell D. and Oregon. Fish Commission
Abstract:: An average of approximately 200,000 pounds of bay clams were harvested annually in Oregon for the years 1943-49, inclusive. The commercial harvest of bay clams is composed of the gaper, cockle, and softshell clams. The recreational, or noncommercial, harvest of bay clams is composed mainly of the gaper, cockle, softshell,...
Resource Type:: Technical Report
Full Text:: fihundance, and General Distribution Lowell D. Marriage FISH COMMISSION OF OREGON Portland, Oregon

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
Full Text:: in Oregon. By Donald L. McKernan, Donald R. Johnson, and John I. Hodges. December 1950. (Trans

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
Full Text:: effect on the abundance of silver salmon (McKernan, John- son, and Hodges, 1950), but in the case of chum

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:: Morgan, Alfred R., Cleaver, Fred C. (Frederick Charles), 1916-, and Oregon. Fish Commission
Abstract:: During a tagging operation conducted in 1951 on the Alsea River, 1,142 adult silver salmon were tagged with plastic Petersen-type tags and stainless steel jaw tags. An attempt was made to determine whether tagged fish released in different apparent conditions suffered differential mortalities. Under the hypothesis that the recovery of...
Resource Type:: Technical Report
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Creator:: Oregon. Fish Commission and Cleaver, Fred C. (Frederick Charles), 1916-
Resource Type:: Technical Report
Full Text:: . Harry, Jr., K. A. Henry, R. T. Heg, J. I. Hodges, E. K. Holmberg, D. R. John- son, L. D. Marriage, C. R

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
Full Text:: Commission of Oregon. W. A. Shewhart, "Economic Control of Quality of Manufactured Product." D. Van Nostrand

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