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: 2488
Isolation of infectious hematopoietic necrosis virus from a leech (Piscicola salmositica) and a copepod (Salmincola sp.), ectoparasites of sockeye salmon Oncorhynchus nerka
Infectious haematopoietic necrosis (IHN) virus was isolated from freshwater leeches Piscicola salmositica and copepods Salmincola sp. removed from the gills of spawning sockeye salmon, Oncorhynchus nerka. This is the first report of the isolation of IHN virus from an animal other than salmonid fishes. High levels of IHN virus were also found in leeches taken from the bottom gravel of the spawning
Authors
Daniel M. Mulcahy, D. Klaybor, W.N. Batts
Changes in numbers of leukocytes in immune organs of juvenile coho salmon after acute stress or cortisol treatment
We examined the effects of acute stress and cortisol treatment on the number of leukocytes (normalized for fish body weight) in the blood, thymus, spleen, and anterior kidney of juvenile coho salmon Oncorhynchus kisutch. In acutely stressed or cortisol-fed fish, the numbers of leukocytes increased significantly in the thymus and anterior kidney, and decreased significantly in blood and spleen with
Authors
Alec G. Maule, Carl B. Schreck
Spatial and temporal variation in proportional stock density and relative weight of smallmouth bass in a reservoir
Population data for smallmouth bass Micropterus dolomieui in 20,235 ha John Day Reservoir on the Columbia River were used to (1) determine whether Proportional Stock Density (PSD) and Relative Weight (Wr) varied spatially and temporally in two areas of the reservoir with established smallmouth bass fisheries; (2) explore possible causes of any observed variation; and (3) discuss some management im
Authors
Matthew G. Mesa, S.D. Duke, David L. Ward
Use of an artificial substrate to collect white sturgeon eggs
No abstract available
Authors
G.T. McCabe, L.G. Beckman
Density-dependence at sea for coho salmon (Oncorhynchus kisutch)
The success of expanded salmon hatchery programs will depend strongly on the degree of density-induced diminishing returns per smolt released. Several authors have addressed the question of density-dependent mortality at sea in coho salmon (Oncorhynchus kisutch), but have come to conflicting conclusions. We believe there are compelling reasons to reinvestigate the data, and have done so for public
Authors
J.M. Emlen, R.R. Reisenbichler, A.M. McGie, T.E. Nickelson
Status and habitat requirements of white sturgeon populations in the Columbia River downstream from McNary Dam
No abstract available
Authors
S.D. Duke, T.J. Underwood, G.M. Asbridge, R.G. Griswold, M.J. Parsley, L.G. Beckman
Simulation estimates of salmonid predation loss to northern squawfish in a Columbia River reservoir. Appendix D-1
No abstract available
Authors
L.J. Bledsoe, S. Vigg, J.H. Petersen
Assessment of smolt condition for travel time analysis. Annual report 1989
The Water Budget is a volume of water used to enhance environmental conditions (flows) in the Columbia and Snake rivers for juvenile salmonids during their seaward migration. To manage the Water Budget, the Fish Passage Center estimates travel times of juvenile salmonids in index reaches of the main-stem rivers, using information on river flows and the migrational characteristics of the juvenile s
Authors
J.W. Beeman, D.W. Rondorf, J.C. Faler, M.E. Free, P.V. Haner
Management implications of a model of predation by a resident fish on juvenile salmonids migrating through a Columbia River reservoir
We constructed a model ofpredation by northern squawfish Ptychocheilus oregonensis on juvenile salmonids migrating through John Day Reservoir. The model predicts salmonid survival as a function of number and distribution of northern squawfish, number and timing of juvenile salmonids entering the reservoir, salmonid residence time, water temperature, and flow. The model predicted survival similar t
Authors
Raymond C. Beamesderfer, Bruce E. Rieman, Lewis J. Bledsoe, Steven Vigg
Assessment of smolt condition for travel time analysis. Annual report 1988
Estimates of migration rates and travel times of juvenile salmonids within index reaches of the Columbia River basin are collected through the Smolt Monitoring Program for use by the Fish Passage Center. With increased reliance upon travel time estimates in 1988 by the Fish Passage Center, this study was implemented to monitor the biological attributes of juvenile chinook salmon Oncorhynchus tshaw
Authors
D.W. Rondorf, J.W. Beeman, J.C. Faler, M.E. Free, E.J. Wagner
Side-scan sonar mapping of lake trout spawning habitat in northern Lake Michigan
Native stocks of lake trout Salvelinus namaycush were virtually or completely extirpated from the lower four Great Lakes by the early 1960s. The failure of early attempts to reestablish self-sustaining populations of lake trout was attributed partly to the practice of stocking hatcheryreared juveniles at locations and over substrates that had not been used in the past for spawning by native fish.
Authors
Thomas A. Edsall, Thomas P. Poe, Robert T. Nester, Charles L. Brown
A summary of trout management at Pyramid Lake with special emphasis on Lahontan cutthroat trout, 1954-1987
No abstract available
Authors
M.E. Coleman, V.K. Johnson