Fish and Aquatic Species Publications
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Filter Total Items: 322
Juvenile Chinook Salmon mortality in a Snake River Reservoir: Smallmouth Bass predation revisited
Predation by nonnative fishes has been identified as a contributing factor in the decline of juvenile salmonids in the Columbia River basin. We examined the diet composition of Smallmouth Bass Micropterus dolomieu and estimated the consumption and predation loss of juvenile Chinook Salmon Oncorhynchus tshawytscha in Lower Granite Reservoir on the Snake River. We examined 4,852 Smallmouth Bass stom
Authors
John M. Erhardt, Kenneth F. Tiffan, William P. Connor
Size, growth, and size‐selective mortality of subyearling Chinook Salmon during early marine residence in Puget Sound
In marine ecosystems, survival can be heavily influenced by size‐selective mortality during juvenile life stages. Understanding how and when size‐selective mortality operates on a population can reveal underlying growth dynamics and size‐selective ecological processes affecting the population and thus can be used to guide conservation efforts. For subyearling Chinook Salmon Oncorhynchus tshawytsch
Authors
Madilyn M. Gamble, Kristin A. Connelly, Jennifer R. Gardner, Joshua W. Chamberlin, Kenneth I. Warheit, David A. Beauchamp
Brook trout distributional response to unconventional oil and gas development: Landscape context matters
We conducted a large-scale assessment of unconventional oil and gas (UOG) development effects on brook trout (Salvelinus fontinalis) distribution. We compiled 2231 brook trout collection records from the Upper Susquehanna River Watershed, USA. We used boosted regression tree (BRT) analysis to predict occurrence probability at the 1:24,000 stream-segment scale as a function of natural and anthropog
Authors
Eric R. Merriam, J. Todd Petty, Kelly O. Maloney, John A. Young, Stephen Faulkner, E. Terrence Slonecker, Lesley E. Milheim, Atesmachew Hailegiorgis, Jonathan M. Niles
Downstream fish passage guide walls: A hydraulic scale model analysis
Partial-depth guide walls are used to improve passage efficiency and reduce the delay of out-migrating anadromous fish species by guiding fish to a bypass route (i.e. weir, pipe, sluice gate) that circumvents the turbine intakes, where survival is usually lower. Evaluation and monitoring studies, however, indicate a high propensity for some fish to pass underneath, rather than along, the guide wal
Authors
Kevin Mulligan, Brett Towler, Alexander J. Haro, David P. Ahlfeld
Smallmouth bass predation on subyearling fall Chinook salmon in Lower Granite Reservoir, 2016–2017
Predation by nonnative fishes is one factor that has been implicated in the decline of juvenile salmonids in the Pacific Northwest. Impoundment of much of the Snake and Columbia Rivers has altered food webs and created habitat favorable for species such as smallmouth bass Micropterus dolomieu. Smallmouth bass are common throughout the Columbia River basin and have become the most abundant predator
Authors
John M. Erhardt, Kenneth F. Tiffan, Rulon J. Hemingway, Brad K. Bickford, Tobyn N. Rhodes
High‐prevalence and low‐intensity Ichthyophonus infections in Pacific Halibut
Ichthyophonus occurred at high prevalence but low intensity in Pacific Halibut Hippoglossus stenolepis throughout the West Coast of North America, ranging from coastal Oregon to the Bering Sea. Infection prevalence in adults was variable on spatial and temporal scales, with the lowest prevalence typically occurring on the edges of the geographic range and highest prevalence consistently occurring
Authors
Paul Hershberger, Jacob L. Gregg, Claude L. Dykstra
An analytical framework for estimating aquatic species density from environmental DNA
Environmental DNA (eDNA) analysis of water samples is on the brink of becoming a standard monitoring method for aquatic species. This method has improved detection rates over conventional survey methods and thus has demonstrated effectiveness for estimation of site occupancy and species distribution. The frontier of eDNA applications, however, is to infer species density. Building upon previous st
Authors
Thierry Chambert, David S. Pilliod, Caren S. Goldberg, Hideyuki Doi, Teruhiko Takahara
Gauging resource exploitation by juvenile Chinook salmon (Oncorhynchus tshawytscha) in restoring estuarine habitat
In the context of delta restoration and its impact on salmonid rearing, success is best evaluated based on whether out-migrating juvenile salmon can access and benefit from suitable estuarine habitat. Here, we integrated 3 years of post-restoration monitoring data including habitat availability, invertebrate prey biomass, and juvenile Chinook salmon (Oncorhynchus tshawytscha) physiological conditi
Authors
Melanie J. Davis, Christopher S. Ellings, Isa Woo, Sayre Hodgson, Kimberly A. Larsen, Glynnis Nakai
Development and characterization of two cell lines from gills of Atlantic salmon
Gill disease in Atlantic salmon, Salmo salar L., causes big losses in the salmon farming industry. Until now, tools to cultivate microorganisms causing gill disease and models to study the gill responses have been lacking. Here we describe the establishment and characterization of two cell lines from the gills of Atlantic salmon. Atlantic salmon gill cell ASG-10 consisted of cells staining for cyt
Authors
Mona C. Gjessing, Maria Aamelfot, William N. Batts, Sylvie L. Benestad, Ole B. Dale, Even Thoen, Simon C. Weli, James R. Winton
Concentrations of environmental DNA (eDNA) reflect spawning salmon abundance at fine spatial and temporal scales
Developing fast, cost-effective assessments of wild animal abundance is an important goal for many researchers, and environmental DNA (eDNA) holds much promise for this purpose. However, the quantitative relationship between species abundance and the amount of DNA present in the environment is likely to vary substantially among taxa and with ecological context. Here, we report a strong quantitativ
Authors
Michael D. Tillotson, Ryan P. Kelly, Jeffrey J. Duda, Marshal S. Hoy, James Kralj, Thomas P. Quinn
Juvenile coho salmon growth and health in streams across an urbanization gradient
Expanding human population and urbanization alters freshwater systems through structural changes to habitat, temperature effects from increased runoff and reduced canopy cover, altered flows, and increased toxicants. Current stream assessments stop short of measuring health or condition of species utilizing these freshwater habitats and fail to link specific stressors mechanistically to the health
Authors
Andrew R. Spanjer, Patrick W. Moran, Kimberly Larsen, Lisa Wetzel, Adam G. Hansen, David A. Beauchamp
Virulence of a chimeric recombinant infectious haematopoietic necrosis virus expressing the spring viraemia of carp virus glycoprotein in salmonid and cyprinid fish
Infectious haematopoietic necrosis virus (IHNV) and spring viraemia of carp virus (SVCV) are both rhabdoviruses of fish, listed as notifiable disease agents by the World Organization for Animal Health. Recombinant rhabdoviruses with heterologous gene substitutions have been engineered to study genetic determinants and assess the potential of these recombinant viruses for vaccine development. A rec
Authors
Eveline Emmenegger, Stéphane Biacchesi, Emilie Mérour, Jolene. A Glenn, Alexander D. Palmer, Michel Brémont, Gael Kurath