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: 2551
Flowing-recirculated water system for inducing spawning phase sea lampreys to spawn in the laboratory Flowing-recirculated water system for inducing spawning phase sea lampreys to spawn in the laboratory
We describe a water-recirculating system for inducing spawning of sea lampreys (Petromyzon marinus) held under laboratory conditions. Water temperature in the system was gradually increased to and maintained at 18 ± 2°C, the optimal temperature for spawning. About 10% freshwater was added daily to prevent buildup of waste products. Sea lampreys were provided substrate (approximately 3–6...
Authors
Kim T. Fredricks, James G. Seelye
Assessment of interspecific interactions in plant communities: an illustration from the cold desert saltbush grasslands of North America Assessment of interspecific interactions in plant communities: an illustration from the cold desert saltbush grasslands of North America
Interspecific interactions influence both the productivity and composition of plant communities. Here, we propose new field procedures and analytical approaches for assessing interspecific interactions in nature and apply these procedures to the salt desert shrub grasslands of western Utah. Data were collected from two grazing treatments over a period of 2 years. The proposed equations...
Authors
Carl D. Freeman, John M. Emlen
Skin reflectance as a non-lethal measure of smoltification for juvenile salmonids Skin reflectance as a non-lethal measure of smoltification for juvenile salmonids
Our efforts to find nonlethal methods of assessing the parr-smoll transformation of juvenile steelhead Oncorhynchus mykiss and spring and fall chinook salmon O. tshawytscha led to the development of a video system for quantitatively measuring skin silvering using skin reflectance. Gill Na'.K'-ATPase activity, skin guanine concentration, and skin reflectance were recorded from groups of...
Authors
Philip V. Haner, Joyce C. Faler, Robin M. Schrock, Dennis W. Rondorf, Alec G. Maule
Developmental instability in the Pacific Hake parasitized by the Myxosporean Kudoa spp. Developmental instability in the Pacific Hake parasitized by the Myxosporean Kudoa spp.
A morphometric study of the otoliths of a population of Pacific hake Merluccius productus was conducted to detect developmental instability (DI) related to parasitism by Myxosporeans, Kudoa spp. We report a link between parasitism and DI, which we measured as fluctuating asymmetry by comparing the right–left differences in otolith shape, width, and weight in the same fish. Otolith shape...
Authors
J. Escos, C.L. Alados, J.M. Emlen, S. Alderstein
Population viability of the Snake River chinook salmon (Oncorhynchus tshawytscha) Population viability of the Snake River chinook salmon (Oncorhynchus tshawytscha)
In the presence of historical data, population viability models of intermediate complexity can be parameterized and utilized to project the consequences of various management actions for endangered species. A general stochastic population dynamics model with density feedback, age structure, and autocorrelated environmental fluctuations was constructed and parameterized for best fit over...
Authors
John M. Emlen
Genetic diversity and phylogenetic classification of viral hemorrhagic septicemia virus Genetic diversity and phylogenetic classification of viral hemorrhagic septicemia virus
No abstract available
Authors
B. Bascuro, P. Vende, A.F. Monnier, J. Winton, P. DeKinkelin, A. Benmansour
Columbia River Basin white sturgeon Columbia River Basin white sturgeon
White sturgeon (Acipenser transmontanus), the largest freshwater fish in North America, live along the west coast from the Aleutian Islands to central California (Scott and Crossman 1973). Genetically similar reproducing populations inhabit three major river basins: Sacramento-San Joaquin, Columbia, and Fraser. The greatest number of white sturgeon are in the Columbia River Basin.
Authors
Allen I. Miller, Timothy D. Counihan, Michael J. Parsley, Lance G. Beckman
Mutational analyses of molecularly cloned satellite tobacco mosaic virus during serial passage in plants: Evidence for hotspots of genetic change Mutational analyses of molecularly cloned satellite tobacco mosaic virus during serial passage in plants: Evidence for hotspots of genetic change
The high level of genetic diversity and rapid evolution of viral RNA genomes are well documented, but few studies have characterized the rate and nature of ongoing genetic change over time under controlled experimental conditions, especially in plant hosts. The RNA genome of satellite tobacco mosaic virus (STMV) was used as an effective model for such studies because of advantageous...
Authors
Gael Kurath, J.A. Dodds
Comparison of 3-trifluoromenthyl-4-nitrophenol (TFM) toxicities to sea lampreys, rainbow trout, and mayfly nymphs in continuous and interrupted 9-h exposures Comparison of 3-trifluoromenthyl-4-nitrophenol (TFM) toxicities to sea lampreys, rainbow trout, and mayfly nymphs in continuous and interrupted 9-h exposures
No abstract available
Authors
R.J. Scholefield, J.G. Seelye, K.S. Slaght
Movements and distributions of radio-tagged northern squawfish near the Dalles and John Day dams. Annual report 1993 Movements and distributions of radio-tagged northern squawfish near the Dalles and John Day dams. Annual report 1993
No abstract available
Authors
H.C. Hansel, R.S. Shively, G. Holmberg, T.P. King, M. Sheer
Immune response to synthetic peptides representing antigenic sites on the glycoprotein of infectious hematopoietic necrosis virus Immune response to synthetic peptides representing antigenic sites on the glycoprotein of infectious hematopoietic necrosis virus
No abstract available
Authors
E. Emmenegger, M. Landolt, S. LaPatra, J. Winton