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: 2517
Water velocity, turbulence, and migration rate of subyearling fall Chinook salmon in the free-flowing and impounded Snake River Water velocity, turbulence, and migration rate of subyearling fall Chinook salmon in the free-flowing and impounded Snake River
We studied the migratory behavior of subyearling fall Chinook salmon Oncorhynchus tshawytscha in free-flowing and impounded reaches of the Snake River to evaluate the hypothesis that velocity and turbulence are the primary causal mechanisms of downstream migration. The hypothesis states that impoundment reduces velocity and turbulence and alters the migratory behavior of juvenile Chinook...
Authors
Kenneth F. Tiffan, Tobias J. Kock, Craig A. Haskell, William P. Connor, R. Kirk Steinhorst
Passage, survival, and approach patterns of juvenile salmonids at Little Goose Dam Passage, survival, and approach patterns of juvenile salmonids at Little Goose Dam
No abstract available
Authors
J.W. Beeman, A.C. Braatz, S.D. Fielding, H.C. Hansel, S.T. Brown, G.T. George, P.V. Haner, G.S. Hansen, D.J. Shurtleff
Survival and migration behavior of subyearling Chinook salmon at Lower Granite Dam Survival and migration behavior of subyearling Chinook salmon at Lower Granite Dam
n/a
Authors
A.L. Puls, T.D. Counihan, C. E. Walker, J.M. Hardiman, I.N. Duran
Pilot study to access the role of Ceratomyxa shasta infection in mortality of fall-run Chinook smolts migrating through the lower Klamath River in 2008 Pilot study to access the role of Ceratomyxa shasta infection in mortality of fall-run Chinook smolts migrating through the lower Klamath River in 2008
Apparent survival and migration rate of radio-tagged hatchery subyearling Chinook salmon released at Iron Gate Hatchery was monitored in the Klamath River to see if the timing of mortality coincided with observations of ceratomyxosis in re-captured coded wire tag cohorts. Despite rapid emigration, these relatively large (mean fork length 92 mm) smolts had a cumulative apparent survival...
Authors
Scott Foott, Greg Stutzer, R. Fogerty, Hal Hansel, Steven Juhnke, John W. Beeman
Factors affecting the age-C resident fish community along shorelines of the Hanford Reach of the Columbia River Factors affecting the age-C resident fish community along shorelines of the Hanford Reach of the Columbia River
The Hanford Reach is one of the few remaining unimpounded sections of the Columbia River. However, because of flow management at upstream dams, there are often large fluctuations in water level. To determine how environmental conditions might affect age-0 resident fishes in the Hanford Reach, we evaluated species composition, distribution, abundance, and standard lengths of larval and...
Authors
D.M. Gadomski, P.G. Wagner
Prevalence of viral erythrocytic necrosis in Pacific herring and epizootics in Skagit Bay, Puget Sound, Washington. Prevalence of viral erythrocytic necrosis in Pacific herring and epizootics in Skagit Bay, Puget Sound, Washington.
Epizootics of viral erythrocytic necrosis (VEN) occurred among juvenile Pacific herring Clupea pallasii in Skagit Bay, Puget Sound, Washington, during 2005-2007 and were characterized by high prevalences and intensities of cytoplasmic inclusion bodies within circulating erythrocytes. The prevalence of VEN peaked at 67% during the first epizootic in October 2005 and waned to 0% by August...
Authors
P.K. Hershberger, N.E. Elder, C.A. Grady, J.L. Gregg, C.A. Pacheco, C. Greene, C. Rice, T.R. Meyers
Species richness, equitability, and abundance of ants in disturbed landscapes Species richness, equitability, and abundance of ants in disturbed landscapes
Ants are used as indicators of environmental change in disturbed landscapes, often without adequate understanding of their response to disturbance. Ant communities in the southeastern United States displayed a hump-backed species richness curve against an index of landscape disturbance. Forty sites at Fort Benning, in west-central Georgia, covered a spectrum of habitat disturbance...
Authors
J.H. Graham, A.J. Krzysik, D.A. Kovacic, J.J. Duda, D.C. Freeman, J.M. Emlen, J.C. Zak, W.R. Long, M.P. Wallace, C. Chamberlin-Graham, J.P. Nutter, H.E. Balbach
Survival and migration behavior of juvenile salmonids at McNary Dam, 2006 Survival and migration behavior of juvenile salmonids at McNary Dam, 2006
During 2006, we used acoustic telemetry and a route-specific survival model (RSSM, Skalski et al. 2002) to estimate behavior, passage, and survival of juvenile salmonids during two different spill operations and diel periods at McNary Dam. An evaluation of 12-h versus 24-h spill was proposed for the spring migration period at McNary Dam. However, high river discharge did not allow for...
Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery
To estimate the Mt. Graham red squirrel (MGRS) population, personnel visit a proportion of middens each year to determine their occupancy (Snow in this vol.). The method results in very tight confidence intervals (high precision), but the accuracy of the population estimate is dependent upon knowing where all the middens are located. I hypothesized that there might be areas outside the...
Authors
James R. Hatten, John L. Koprowski
Survival and migration behavior of juvenile coho salmon in the Klamath River relative to discharge at Iron Gate Dam, Northern California, 2007 Survival and migration behavior of juvenile coho salmon in the Klamath River relative to discharge at Iron Gate Dam, Northern California, 2007
This report describes a study of survival and migration behavior of juvenile coho salmon in the Klamath River relative to discharge at Iron Gate Dam in 2006. This was the second year of a multi-year study with the goal of determining the effects of discharge at Iron Gate Dam on survival of juvenile coho salmon downstream. The study was a collaborative effort among U.S. Geological Survey...
Authors
John W. Beeman, Greg Stutzer, Steve Juhnke, Nicholas Hetrick
Differential survival of Ichthyophonus isolates indicates parasite adaptation to its host environment Differential survival of Ichthyophonus isolates indicates parasite adaptation to its host environment
In vitro viability of Ichthyophonus spp. spores in seawater and freshwater corresponded with the water type of the host from which the spores were isolated. Among Ichthyophonus spp. spores from both marine and freshwater fish hosts (Pacific herring, Clupea pallasii, and rainbow trout, Oncorhynchus mykiss, respectively), viability was significantly greater (P 0.05) after incubation in...
Authors
P.K. Hershberger, C.A. Pacheco, J.L. Gregg, M. K. Purcell, S. E. LaPatra