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: 2525
Comparison of subyearling fall chinook salmon's use of riprap revetments and unaltered habitats in Lake Wallula of the Columbia river Comparison of subyearling fall chinook salmon's use of riprap revetments and unaltered habitats in Lake Wallula of the Columbia river
Subyearling fall chinook salmon's Oncorhynchus tshawytscha use of unaltered and riprap habitats in Lake Wallula of the Columbia River was determined with point abundance data collected by electrofishing in May 1994 and 1995. We documented the presence or absence of subyearlings at 277 sample sites and collected physical habitat information at each site. Based on logistic regression, we...
Authors
R.D. Garland, K.F. Tiffan, D.W. Rondorf, L.O. Clark
Factors influencing the distribution of Myxobolus cerebralis, the causative agent of whirling disease, in the Cache la Poudre River, Colorado Factors influencing the distribution of Myxobolus cerebralis, the causative agent of whirling disease, in the Cache la Poudre River, Colorado
Oligochaetes, triactinomyxons (TAMs), and age-0 trout were sampled in the upper Cache la Poudre River, Colorado, to determine the distribution of Myxobolus cerebralis during 1997 and 1998. Densities of the intermediate host, the oligochaete Tubifex tubifex, were 3.5 orders of magnitude higher in the M. cerebralis-infected Poudre Rearing Unit (PRU) trout rearing ponds than at any of the...
Authors
M. Brady Allen, Eric P. Bergersen
Characterization of the humoral and cellular immune response of salmonids to Renibacterium salmoninarum. Report for June-September 2002 Characterization of the humoral and cellular immune response of salmonids to Renibacterium salmoninarum. Report for June-September 2002
Abstract not available
Authors
R.J. Pascho
A simulation study of factors controlling white sturgeon recruitment in the Snake River A simulation study of factors controlling white sturgeon recruitment in the Snake River
Five of the nine populations of white sturgeon Acipenser transmontanus, located between dams on the Middle Snake River, have declined from historical levels and are now at risk of extinction. One step towards more effectively protecting and managing these nine populations is ranking factors that influence recruitment in each of these river segments. We developed a model to suggest which...
Authors
H.I. Jager, W. Van Winkle, James Angus Chandler, K.B. Lepla, P. Bates, T.D. Counihan
The identification of parasites in fish tissue sections The identification of parasites in fish tissue sections
The identification of parasites in tissue sections is often difficult and fresh specimens are always required for accurate taxonomical classification. However, histological sections are in many cases the only material available and the identification of parasites in sections the subject of the recent histopathology workshop held in Dublin. The group reviewed the characteristics of...
Authors
B. Nowak, D.G. Elliott, D.W. Bruno
White sturgeon mitigation and restoration in the Columbia and Snake Rivers upstream from Bonneville Dam White sturgeon mitigation and restoration in the Columbia and Snake Rivers upstream from Bonneville Dam
No abstract available
Authors
M.J. Parsley, D.G. Gallion, K.M. Kappenman, P.E. Kofoot
Genetic characterization of infectious hematopoietic necrosis virus of coastal salmonid stocks in Washington State Genetic characterization of infectious hematopoietic necrosis virus of coastal salmonid stocks in Washington State
Infectious hematopoietic necrosis virus (IHNV) is a pathogen that infects many Pacific salmonid stocks from the watersheds of North America. Previous studies have thoroughly characterized the genetic diversity of IHNV isolates from Alaska and the Hagerman Valley in Idaho. To enhance understanding of the evolution and viral transmission patterns of IHNV within the Pacific Northwest...
Authors
E.J. Emmenegger, Gael Kurath
Diet, distribution and life history of Neomysis mercedis in John Day Reservoir of the Columbia River (USA) Diet, distribution and life history of Neomysis mercedis in John Day Reservoir of the Columbia River (USA)
No abstract available.
Authors
C. A. Haskell, J. A. Stanford
Developmental instability and fitness in Periploca laevigata experiencing grazing disturbance Developmental instability and fitness in Periploca laevigata experiencing grazing disturbance
We investigated the sensitivity of developmental instability measurements (leaf fluctuating asymmetry, floral radial asymmetry, and shoot translational asymmetry) to a long‐standing natural stress (grazing) in a palatable tannin‐producing shrub (Periploca laevigata Aiton). We also assessed the relationship between these measures of developmental instability and fitness components (growth...
Authors
C.L. Alados, M.L. Giner, L. Dehesa, J. Escos, F. Barroso, J.M. Emlen, D.C. Freeman
Incidence of Ichthyophonus hoferi in Puget Sound fishes and its increase with age of Pacific herring Incidence of Ichthyophonus hoferi in Puget Sound fishes and its increase with age of Pacific herring
A recent decrease in the mean age of adult Pacific herring Clupea pallasi in Puget Sound was associated with a high prevalence of Ichthyophonus hoferi, a protistan parasite that can be highly pathogenic to Pacific herring. In Puget Sound, high intensities of I. hoferiinfection may be maintained in older cohorts of Pacific herring because the prevalence ofI. hoferi increased with age from...
Authors
P.K. Hershberger, K. Stick, B. Bui, C. Carroll, B. Fall, C. Mork, J.A. Perry, E. Sweeney, J. Wittouck, J. Winton, R. Kocan
Novel molecular markers differentiate Oncorhynchus mykiss (rainbow trout and steelhead) and the O. clarki (cutthroat trout) subspecies Novel molecular markers differentiate Oncorhynchus mykiss (rainbow trout and steelhead) and the O. clarki (cutthroat trout) subspecies
A suite of 26 PCR-based markers was developed that differentiates rainbow (Oncorhynchus mykiss) and coastal cutthroat trout (O. clarki clarki). The markers also differentiated rainbow from other cutthroat trout subspecies (O. clarki), and several of the markers differentiated between cutthroat trout subspecies. This system has numerous positive attributes, including: nonlethal sampling...
Authors
C.O. Ostberg, R. J. Rodriguez