Publications
USGS divers in the Elwha River
WFRC zebrafish laboratory
Processing a Lost River sucker
Below is a list of available WFRC peer reviewed and published science.
Filter Total Items: 2485
Observations on gas-bubble disease of fish
SOME DIFFICULTY has been experienced in raising fry and young fingerlings at the Puyallup hatchery of the Washington State Department of Game, a hatchery now in its fourth year of operation. There has been evidence of gas in the yolk-sac fry, and the mortality was always excessive among the fingerlings while reared in the hatchery troughs. The mortality rate decreased and evidence of gas-bubble di
A contagious disease of salmon, possibly of virus origin
Production records for 1885, 1891–1908, and 1929–49, indicate cyclic fluctuations for several important species of fish. The average annual take (all species) of 3,582,000 pounds in 1929–49 was 3,503,000 pounds below the 1891–1908 mean of 7,085,000 pounds. Decline in the output of lake herring alone from 5,841,000 pounds in 1891–1908 to 1,070,000 pounds in 1929–49—a drop of 4,771,000 pounds—more t
Authors
R.R. Rucker, W.J. Whipple, J.R. Parvin, C.A. Evans
An interim report on gill disease
GILL DISEASE among fish, a disease which is characterized by a proliferation of the gill epithelium, has been attributed to a number of different causes. Generally, there are two recognized types: the eastern or bacterial type, in which long filamentous bacteria can always be demonstrated; and the western type, in which, by definition, bacteria cannot be demonstrated.
Authors
R.R. Rucker, H.E. Johnson, G.M. Kaydas
Effect of bactericides on steelhead trout fry
No abstract available.
Authors
R.R. Rucker, W.J. Whipple
Pollution in the lower Columbia Basin in 1948 with particular reference to the Willamette River
Development of the salmon resources of the lower Columbia River Basin appears as sound insurance against the threat of a serious reduction in the runs to the upper river areas through the multiple-purpose programs of water development now under way by the Corps of Engineers, the Bureau of Reclamation, and private interests. Any comprehensive plan for the full development of the fisheries resources
Authors
F. F. Fish, R.R. Rucker
A streptomycete pathogenic to fish
A streptomycete and pseutdomonad were isolated from blueback salmon, Oncorhynchuis nerka (WValbaum), and shown to be pathogenic to fish. Trhese organisms were isolated from young blueback salmon taken from a gr'oup that developed an increasing mortality after feeding about a month at the United States Fishery Station, Leavenworth, Washington. A superficial examination revealed only the presence of
Authors
R.R. Rucker
An investigation of the bactericidal action and fish toxicity of two homologous series of quaternary ammonium compounds
Bacterial gill disease when uncontrolled causes heavy losses among hatchery fish. The disease is characterized by a proliferation of the gill epithelium overlaid with masses of myxobacteria. The characteristic hyperplasia probably causes death by preventing the proper interchange of gases between the water and the blood stream of the fish.
A number of strains of myxobacteria differing primarily in
Authors
R.R. Rucker
Fact and fiction in spawntaking: Addenda
I was glad to see "Fact and Fiction in Spawntaking" by Wood and Dunn (1948) in a recent issue of the PROGRESSIVE FISH CULTURIST. Having spent two seasons at the Yellowstone Park station, I also attempted to find ways of increasing the efficiency of fertilization and several years ago conducted a few experiments along these lines. From these experiments I obtained some "facts and fiction" that I be
Authors
R.R. Rucker
New compounds for the control of bacterial gill disease
BACTERIAL GILL DISEASE, a common epizootic among hatchery fish, can be controlled by copper sulphate dips, as stated by Davis (1945), or by prolonged treatments with Roccal, as noted by Fish (1947). The use of copper sulphate is not without danger because of variation in toxicity according to the hardness of the particular water supply; also, the toxicity and efficacy of Roccal have varied conside
Authors
R.R. Rucker
The return on the blueback salmon to the Columbia River
THE year 1941 was a crucial one for the blueback salmon of the Columbia River. During that year, one brood came closer to extinction than was realized by more than a few individuals. The immediate causes were not overfishing, hydroelectric power development, or irrigation—although these factors continued to exert their long-standing effects. The direct causes can be attributed to an “act of God” p
Authors
Frederick S. Fisher
A report upon the Grand Coulee Fish Maintenance Project 1939-1947
The construction or Grand Coulee Dam, on the upper Columbia River, involved the loss of 1,140 lineal miles of spawning and rearing stream to the production of anadromous fishes. The fact that the annual value of these fish runs to the nation was estimated at $250,000 justified reasonable expenditures to assure their perpetuation. It was found economically infeasible to safely collect and pass adul
Authors
F. F. Fish, Mitchell G. Hanavan
Removal of excess nitrogen in a hatchery water supply
The water system at the U. S. Fish Cultural Station, Leavenworth, Washington, has been supplemented with two wells that were to be used to increase the temperature of the water during the winter and to cool the Water in the summer if necessary. The well water proved to be unsuitable for hatchery purposes because it was supersaturated with nitrogen, causing "gas-bubble" disease among fish subjected
Authors
R.R. Rucker