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Some factors influencing the trends of salmon populations in 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

Characterizing the Spread and Consequences of Mycoplasma ovipneumoniae on Bighorn Sheep (Ovis canadensis) in the Northern Basin and Range Ecosystem

Creator:: Spaan, Robert S.
Abstract:: North American bighorn sheep (Ovis canadensis) have experienced significant declines and population extirpations due to novel pathogens such as Mycoplasma ovipneumoniae. This disease continues to limit the population restoration of bighorn sheep. Therefore, understanding the demographic consequences of pathogen presence and the risk of contact between bighorn populations and potential...
Resource Type:: Dissertation
Full Text:: . Spaan1, Clinton W. Epps1, Rachel S. Crowhurst1, Donald G. Whittaker2, Mike Cox3 and Adam Duarte1, 4

A measured delay in the migration of adult chinook salmon at Bonneville Dam on the Columbia River

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

The Indian Dip Net Fishery at Celilo Falls on the Columbia River

Creator:: Schoning, Robert W., Merrell, Theodore R., Johnson, Donald R., and Oregon. Fish Commission
Abstract:: 1. The Indians at Celilo Falls catch an average of over 2,600,000 pounds of fish each year, in dip nets in a manner very much the same as used by their ancestors. 2. The bulk of the fish caught at Celilo Falls is from the upriver fall run of chinook...
Resource Type:: Technical Report

Observations on horseclams of the 1949-50 set in Yaquina Bay

Creator:: Tollefson, Roger, Marriage, Lowell D., Twahy, Donald, Wilkes, Stanley, Woelke, Charles, and Oregon. Fish Commission
Abstract:: This report contains a series of individual reports within it. The main report continues growth and aging studies on fat gaper clams in Yaquina Bay. This document also includes a report on other Fish Commission activities on the Coast, a summary of razor clam research, the beginning of a survey...
Resource Type:: Technical Report
Full Text:: the age of the horseclam. Growth lines are formed throughout the year but at a varying rate which is

The effects on salmon populations of the partial elimination of fixed fishing gear on the Columbia River in 1935

Creator:: Johnson, Donald R., Chapman, Wilbert McLeod, 1910-1970, Schoning, Robert W., and Oregon. Fish Commission
Abstract:: 1. Six major types of commercial gear have been used to take salmon and steelhead on the Columbia River; namely, gill nets, set nets, seines, traps, fish wheels and dip nets. 2. The five important commercial species in the Columbia River are chinook, silver, blueback and chum salmon and steelhead...
Resource Type:: Technical Report
Full Text:: is ''hung" (the manner of attaching and propor- tioning the cork and lead line). Fishermen take

Salmon fisheries of the coastal rivers of Oregon south of the Columbia

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

Age, length and weight studies of three species of Columbia River salmon (Oncorhynchus keta, O. gorbuscha and O. kisutch)

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

Identification, distribution, and notes on food habits of fish and shellfish in Tillamook Bay, Oregon

Creator:: Forsberg, Brent O., Johnson, J. A. (John Andrew), 1909-, and Klug, Stephen M.
Resource Type:: Technical Report
Full Text:: , John A. Johnson, and Stephen M. Klug Oregon Department of Fish and Wildlife Research Section

Assessing Mercury Levels, Health Metrics, and Immune Function in Non-stranded Male California and Steller Sea Lions in Oregon

Creator:: Rae, Samantha N.
Abstract:: California and Steller sea lions (Zalophus californianus, Eumetopias jubatus, respectively) are considered sentinel species because they have long life spans, are long-term coastal residents, feed at high trophic levels, and have large blubber stores that serve as depots for anthropogenic toxicants. There are few studies on sea lion health and...
Resource Type:: Masters Thesis
Full Text:: lines, and at dams and fish passage locations in rivers (Norberg et al. 2005). Steller sea lions are

ScholarsArchive@OSU

Some factors influencing the trends of salmon populations in Oregon

Characterizing the Spread and Consequences of Mycoplasma ovipneumoniae on Bighorn Sheep (Ovis canadensis) in the Northern Basin and Range Ecosystem

A measured delay in the migration of adult chinook salmon at Bonneville Dam on the Columbia River

The Indian Dip Net Fishery at Celilo Falls on the Columbia River

Observations on horseclams of the 1949-50 set in Yaquina Bay

The effects on salmon populations of the partial elimination of fixed fishing gear on the Columbia River in 1935

Salmon fisheries of the coastal rivers of Oregon south of the Columbia

Age, length and weight studies of three species of Columbia River salmon (Oncorhynchus keta, O. gorbuscha and O. kisutch)

Identification, distribution, and notes on food habits of fish and shellfish in Tillamook Bay, Oregon

Assessing Mercury Levels, Health Metrics, and Immune Function in Non-stranded Male California and Steller Sea Lions in Oregon

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