Publications
Filter Total Items: 2066
Western purple martin (Progne subis arboricola) occurrence on the Siuslaw National Forest, Summer 2019 Western purple martin (Progne subis arboricola) occurrence on the Siuslaw National Forest, Summer 2019
The western subspecies of the purple martin (Progne subis arboricola) is currently listed as a “critically” sensitive species in four ecoregions of western Oregon: Coast Range, Klamath Mountains, West Cascades, and Willamette Valley (Oregon Department of Fish and Wildlife, 2019). Importantly distinct from the abundant and widespread eastern subspecies (Progne subis subis), the western...
Authors
Joan Hagar, Eric Branch
Comparing methods to estimate the proportion of turbine-induced bird and bat mortality in the search area under a road and pad search protocol Comparing methods to estimate the proportion of turbine-induced bird and bat mortality in the search area under a road and pad search protocol
Estimating bird and bat mortality at wind facilities typically involves searching for carcasses on the ground near turbines. Some fraction of carcasses inevitably lie outside the search plots, and accurate mortality estimation requires accounting for those carcasses using models to extrapolate from searched to unsearched areas. Such models should account for variation in carcass density...
Authors
Joseph Maurer, Manuela Huso, Daniel Dalthorp, Lisa Madsen, Claudio Fuentes
It’s complicated…environmental DNA as a predictor of trout and char abundance in streams It’s complicated…environmental DNA as a predictor of trout and char abundance in streams
The potential to provide inferences about fish abundance from environmental (e)DNA samples has generated great interest. However, the accuracy of these abundance estimates is often low and variable across species and space. A plausible refinement is the use of common aquatic habitat monitoring data to account for attributes that influence eDNA dynamics. We therefore evaluated the...
Authors
Adam Sepulveda, Robert Al-Chokhachy, Matthew Laramie, Kyle Crapster, Ladd Knotek, Brian T. Miller, Alexander V. Zale, David Pilliod
From satellites to frogs: Quantifying ecohydrological change, drought mitigation, and population demography in desert meadows From satellites to frogs: Quantifying ecohydrological change, drought mitigation, and population demography in desert meadows
Increasing frequency and severity of droughts have motivated natural resource managers to mitigate harmful ecological and hydrological effects of drought, but drought mitigation is an emerging science and evaluating its effectiveness is difficult. We examined ecohydrological responses of drought mitigation actions aimed at conserving populations of the Columbia spotted frog (Rana...
Authors
David S. Pilliod, Mark B. Hausner, Rick D. Scherer
Nowhere to hide: The importance of instream cover for stream‐living Coastal Cutthroat Trout during seasonal low flow Nowhere to hide: The importance of instream cover for stream‐living Coastal Cutthroat Trout during seasonal low flow
Through their multiple functions, refuges may be important for stream‐living fishes, particularly during stressful events such as seasonal low flow or drought. Coastal Cutthroat Trout Oncorhynchus clarkii clarkii is an ideal study organism to understand the importance of refuge. During seasonal low flow, lower water levels limit access to refuge and emigration, survival of fish is low...
Authors
Brooke E Penaluna, Jason B. Dunham, Heidi V. Andersen
Evaluating a rapid field assessment system for anticoagulant rodenticide exposure of raptors Evaluating a rapid field assessment system for anticoagulant rodenticide exposure of raptors
Anticoagulant rodenticides (ARs) are commonly used to control rodent pests. However, worldwide, their use is associated with secondary and tertiary poisoning of nontarget species, especially predatory and scavenging birds. No medical device can rapidly test for AR exposure of avian wildlife. Prothrombin time (PT) is a useful biomarker for AR exposure, and multiple commercially available...
Authors
Ariana J Dickson, James R. Belthoff, Kristen A Mitchell, Brian W. Smith, Zachary P. Wallace, Matthew J. Stuber, Michael J. Lockhart, Barnett A. Rattner, Todd E. Katzner
Harvester ant seed removal in an invaded sagebrush ecosystem: Implications for restoration Harvester ant seed removal in an invaded sagebrush ecosystem: Implications for restoration
A better understanding of seed movement in plant community dynamics is needed, especially in light of disturbance‐driven changes and investments into restoring degraded plant communities. A primary agent of change within the sagebrush‐steppe is wildfire and invasion by non‐native forbs and grasses, primarily cheatgrass (Bromus tectorum). Our objectives were to quantify seed removal and...
Authors
Kelsey E Paolini, Matthew Modlin, Alexis A Suazo, David Pilliod, Robert S. Arkle, Kerri T. Vierling, Joseph D. Holbrook
The snag’s the limit: Habitat selection modeling for the western purple martin in a managed forest landscape The snag’s the limit: Habitat selection modeling for the western purple martin in a managed forest landscape
The western purple martin (Progne subis arboricola), an avian insectivore, is a species of conservation concern throughout the Pacific Northwest. Compared to the well-studied eastern subspecies (Progne subis subis), little is known of the life history and biology of the western subspecies. Availability of breeding habitat is believed to be a major limiting factor for western purple...
Authors
Lorelle M. Sherman, Joan Hagar
High frequency of lead exposure in the population of an endangered Australian top predator, the Tasmanian wedge-tailed eagle (Aquila audax fleayi) High frequency of lead exposure in the population of an endangered Australian top predator, the Tasmanian wedge-tailed eagle (Aquila audax fleayi)
Lead poisoning, mainly through incidental ingestion of lead ammunition in carcasses, is a threat to scavenging and predatory bird species worldwide. In Australia, shooting for animal control is widespread, and a range of native scavenging species are susceptible to lead exposure. However, the prevalence of lead exposure in Australia's scavenging and predatory birds is largely unknown. We...
Authors
James M. Pay, Todd E. Katzner, Clare E. Hawkins, Amelia J. Koch, Jason M. Wiersm, William E. Brown, Nick J. Mooney, Elissa Z. Cameron
Relative abundance of coyotes (Canis latrans) influences gray fox (Urocyon cinereoargenteus) occupancy across the eastern United States Relative abundance of coyotes (Canis latrans) influences gray fox (Urocyon cinereoargenteus) occupancy across the eastern United States
Gray fox (Urocyon cinereoargenteus (Schreber, 1775)) populations in portions of the eastern United States have experienced declines whose trajectories differ from those of other mesocarnivore populations. One hypothesis is that gray fox declines may result from interspecific interactions, particularly competition with abundant coyotes (Canis latrans Say, 1823). Alternatively, gray foxes...
Authors
Michael E. Egan, Casey C. Day, Todd E. Katzner, Patrick A. Zollner
Diurnal timing of nonmigratory movement by birds: The importance of foraging spatial scales Diurnal timing of nonmigratory movement by birds: The importance of foraging spatial scales
Timing of activity can reveal an organism's efforts to optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging. Here, we assess whether signals of either of these strategies are detectable in the timing of activity of daily, local movements by birds. We compare the similarities of timing of movement activity among...
Authors
Julie M. Mallon, Marlee A. Tucker, Annalea Beard, Richard O Bierregaard, Keith L. Bildstein, Katrin Böhning-Gaese, John N. Brzorad, Evan R. Buechley, Javier Bustamante, Carlos Carrapato, Jose Alfredo Castillo-Guerrero, Elizabeth Clingham, Mark Desholm, Christopher R. DeSorbo, Robert Domenech, Hayley Douglas, Olivier Duriez, Peter Enggist, Nina Farwig, Wolfgang Fiedler, Anna Gagliardo, Clara García‐Ripollés, Jose Antonio Gil Gallus, Morgan E. Gilmour, Roi Harel, Autumn-Lynn Harrison, Leeann Henry, Todd E. Katzner, Roland Kays, Erik Kleyheeg, Rubén Limiñana, Pascual Lopez-Lopez, Giuseppe Lucia, Alan Maccarone, Egidio Mallia, Ugo Mellone, E.K. Mojica, Ran Nathan, Scott H. Newman, Steffen Oppel, Yotam Orchan, Diann J. Prosser, Hannah Riley, Sascha Rösner, Dana G. Schabo, Holger Schulz, Scott A. Shaffer, Adam Shreading, João Paulo Silva, Jolene Sim, Henrik Skov, Orr Spiegel, Matthew J. Stuber, John Y. Takekawa, Vicente Urios, Javier Vidal-Mateo, Kevin Warner, Bryan D. Watts, Nicola Weber, Sam Weber, Martin Wikelski, Ramunas Zydelis, Thomas Mueller, William F. Fagan
Annotated bibliography of scientific research on greater sage-grouse published from 2015 to 2019 Annotated bibliography of scientific research on greater sage-grouse published from 2015 to 2019
The greater sage-grouse (Centrocercus urophasianus; hereafter GRSG) has been a focus of scientific investigation and management action for the past two decades. The 2015 U.S. Fish and Wildlife Service listing determination of “not warranted” was in part due to a large-scale collaborative effort to develop strategies to conserve GRSG populations and their habitat and to reduce threats to...
Authors
Sarah K. Carter, Robert S. Arkle, Heidi L. Bencin, Benjamin R. Harms, Daniel J. Manier, Aaron N. Johnston, Susan L. Phillips, Steven E. Hanser, Zachary H. Bowen