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: 2562
A model for estimating deficits in the size of spawning stocks for spring Chinook salmon in tributaries of the upper Columbia River basin A model for estimating deficits in the size of spawning stocks for spring Chinook salmon in tributaries of the upper Columbia River basin
No abstract available
Authors
J.D. McIntyre
Direct fluorescent antibody technique for the detection of bacterial kidney disease in paraffin-embedded tissues Direct fluorescent antibody technique for the detection of bacterial kidney disease in paraffin-embedded tissues
The direct fluorescent antibody technique (FAT) was successfully used to detect the causative agent of bacterial kidney disease (BKD), Renibacterium salmoninarum, in Bouin's solution flexed and paraffinembedded egg and tissue sections. This method is superior to gram stain and may be particularly useful in detecting the BKD organism in fish with low-grade infection.
Authors
T. Ochiai, W. T. Yasutake, R. W. Gould
Comparisons of spawning areas and times for two runs of chinook salmon (Oncorhynchus tshawytscha) in the Kenai River, Alaska Comparisons of spawning areas and times for two runs of chinook salmon (Oncorhynchus tshawytscha) in the Kenai River, Alaska
From 1979 to 1982,188 chinook salmon (Oncorhynchus tshawytscha) were tagged with radio transmitters to locate spawning areas in the glacial Kenai River, southcentral Alaska. Results confirmed that an early run entered the river in May and June and spawned in tributaries, and a late run entered the river from late June through August and spawned in the main stem. Spawning peaked during...
Authors
C. V. Burger, R.L. Wilmot, D.B. Wangaard
Effects of a Kentucky flood-control reservoir on macroinvertebrates in the tailwater Effects of a Kentucky flood-control reservoir on macroinvertebrates in the tailwater
The effects of a flood-control reservoir on downstream macroinvertebrates were assessed by comparing the tailwater community with that of a natural stream. Samples were collected 1.6 and 21.1 km below Barren River Lake dam in 1979, 1980, and 1981 and in a reservoir tributary in 1980 and 1981. An indication of environmental stress in the macroinvertebrate community was observed at both...
Authors
J.F. Novotny
Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon (Oncorhynchus kisutch) Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon (Oncorhynchus kisutch)
The effects of chronic (6 months) exposure to arsenic trioxide in fresh water on the Parr-smolt transformation of coho salmon (Oncorhynchus kisutch) were evaluated. Exposure to 300 μg As/L (as As2O3) appeared to delay the onset of the normal increase in plasma thyroxine concentration and cause a transient reduction of gill Na+,K+-ATPase activity. Fish exposed to 300 μg As/L also migrated...
Authors
J.W. Nichols, Gary Wedemeyer, F.L. Mayer, Walton W. Dickhoff, S.V. Gregory, W. T. Yasutake, S.D. Smith
Comparison of in vitro growth characteristics of ten isolates of infectious hematopoietic necrosis virus Comparison of in vitro growth characteristics of ten isolates of infectious hematopoietic necrosis virus
Ten isolates of infectious haematopoietic necrosis from salmonid fishes of different locations on the West Coast of North America from California to Alaska were compared by plaque size, single-step growth curves at 15 and 18 °C, rate of appearance of cytopathic effects in cell cultures, and growth over a range of temperatures. All isolates were distinguishable on the basis of each growth
Authors
D. Mulcahy, R.J. Pascho, C.K. Jenes
Appearance and quantification of infectious hematopoietic necrosis virus in female sockeye salmon (Oncorhynchus nerka) during their spawning migration Appearance and quantification of infectious hematopoietic necrosis virus in female sockeye salmon (Oncorhynchus nerka) during their spawning migration
The incidence and amount of infectious hematopoietic necrosis (IHN) virus was determined in 10 organs and body fluids from each of 100 female sockeye salmon(Oncorhynchus nerka) before, during, and after their spawning migration into freshwater. Virus was found in high concentrations only in fish sampled during and after spawning. Infection rates increased from nil to 100 percent within 2...
Authors
D. Mulcahy, C.K. Jenes, R.J. Pascho
Disease caused by environmental stressors Disease caused by environmental stressors
The use of the terms 'stress' and 'stressor' is sometimes inconsistent (e.g., Pickering, 1981). The term 'stressor' should be used to describe environmental or other factor intensities severe enough to require a compensatory response at any level of biological organization. A stressor is normally extrinsic. The term 'stress' indicates the organismic response initiated by the stressor...
Authors
Gary Wedemeyer, C.P. Goodyear
Preliminary evaluation of predation control measures for major predators in the Columbia River Preliminary evaluation of predation control measures for major predators in the Columbia River
No abstract available
Authors
P.T. Lofy, S.D. Duke, M.J. Parsley, M.G. Mesa, G.M. Sonneville, L.A. Prendergast
Feeding activity, rate of consumption, daily ration, and prey selection of major predators in the John Day Pool Feeding activity, rate of consumption, daily ration, and prey selection of major predators in the John Day Pool
No abstract available
Authors
G.A. Gray, D.E. Palmer, B.L. Hilton, P.J. Connolly, H.C. Hansel, J.M. Beyer, P.T. Lofty, G.M. Sonnevil
Stress and disease in the aquatic environment: individual and population-level responses Stress and disease in the aquatic environment: individual and population-level responses
No abstract available
Authors
Gary Wedemeyer, C.P. Goodyear