Publications
Find out more about Species Management Research Program through our publications. Browse the entire list below or by specific topics at the links below.
Filter Total Items: 653
Migratory behavior and physiological development as potential determinants of life history diversity in fall Chinook Salmon in the Clearwater River
We studied the influence of behavior, water velocity, and physiological development on the downstream movement of subyearling fall‐run Chinook Salmon Oncorhynchus tshawytscha in both free‐flowing and impounded reaches of the Clearwater and Snake rivers as potential mechanisms that might explain life history diversity in this stock. Movement rates and the percentage of radio‐tagged fish that moved
Authors
Kenneth F. Tiffan, Tobias J. Kock, William P. Connor, Marshall C. Richmond, William A. Perkins
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
Identifying optimal remotely-sensed variables for ecosystem monitoring in Colorado Plateau drylands
Water-limited ecosystems often recover slowly following anthropogenic or natural disturbance. Multitemporal remote sensing can be used to monitor ecosystem recovery after disturbance; however, dryland vegetation cover can be challenging to accurately measure due to sparse cover and spectral confusion between soils and non-photosynthetic vegetation. With the goal of optimizing a monitoring approach
Authors
Travis B. Poitras, Miguel L. Villarreal, Eric K. Waller, Travis W. Nauman, Mark E. Miller, Michael C. Duniway
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
Raptor interactions with wind energy: Case studies from around the world
The global potential for wind power generation is vast, and the number of installations is increasing rapidly. We review case studies from around the world of the effects on raptors of wind-energy development. Collision mortality, displacement, and habitat loss have the potential to cause population-level effects, especially for species that are rare or endangered. The impact on raptors has much t
Authors
Richard T. Watson, Patrick S. Kolar, Miguel Ferrer, Torgeir Nygård, Naira Johnston, W. Grainger Hunt, Hanneline A. Smit-Robinson, Christopher J Farmer, Manuela M. Huso, Todd E. Katzner
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
Oil and gas development footprint in the Piceance Basin, western Colorado
Understanding long-term implications of energy development on ecosystem functionrequires establishing regional datasets to quantify past development and determine relationships to predict future development. The Piceance Basin in western Colorado has a history of energy production and development is expected to continue into the foreseeable future due to abundant natural gas resources. To facilita
Authors
Cericia D. Martinez, Todd M. Preston
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