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Year Published: 2019

Interactive effects of severe drought and grazing on the life history cycle of a bioindicator species on the edge of its range

Recurring drought and grazing are ecological drivers of semi-arid grasslands on the Southern High Plains, USA; however, ecological drivers are currently undergoing human-induced alterations, which likely have implications for wildlife. We used the lesser prairie-chicken (Tympanuchus pallidicinctus), an iconic grouse species that exhibits a boom-...

Haukos, David A.; Boal, Clint W.; S. R. Fritts1; B. A. Grisham1; R. D. Cox1; P. McDaniel4; C. A. Hagen; D. U. Greene6

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Year Published: 2019

A landscape-level assessment of whitebark pine regeneration in the Rocky Mountains, USA

Whitebark pine (Pinus albicaulis Engelm.) has recently experienced high mortality due to multiple stressors, and future population viability may rely on natural regeneration. We assessed whitebark pine seedling densities throughout the US Rocky Mountains and identified stand, site, and climatic variables related to seedling presence based on data...

Sara Goeking; Deborah Izlar; Edwards, Thomas C.

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Year Published: 2019

Identifying optimal hauling densities for adult Chinook Salmon trap and haul operations

Trap and haul programs are used to conserve fish populations by circumventing high mortality locations or events, and enhancing population abundance by reintroducing fish to historical habitats and mitigating for fish passage limitations. Spring run Chinook Salmon are transported in trucks upstream of barrier dams in Willamette River Tributaries...

Michael Colvin; Peterson, James; Sharpe, Cameron; Kent, Michael L.; Schreck, Carl B.

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Year Published: 2019

Characterizing residence patterns of North Atlantic right whales in the southeastern U.S. with a multistate open robust design model

Effective conservation of endangered North Atlantic right whales (Eubalaena glacialis) requires information about their spatio-temporal distribution. Understanding temporal distribution is particularly important, because a portion of the population migrates between high latitude summer feeding grounds off the northeastern U.S. and Canadian...

Krystan, A.M.; Gowan, T.A.; Kendall, William L.; Martin, Julien; Ortega-Ortiz, J.G.; Jackson, K.B.; Knowlton, A.R.; Naessig, P.; Zani, M.; Schulte, D.W.; Taylor, C.R.

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Year Published: 2019

Modeling golden eagle‐vehicle collisions to design mitigation strategies

The incidental take of golden eagles (Aquila chrysaetos) as a result of wind energy development requires some form of compensatory mitigation. Although several options have been proposed, only one has been formerly accepted and implemented, and the lack of options can limit the permit process for wind facilities. We developed a model to estimate...

Lonsdorf, Eric V.; Sanders-Reed, Carol A.; Boal, Clint W.; Allison, Taber

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Year Published: 2019

Demographic consequences of conservation reserve program grasslands for lesser prairie‐chickens

Knowledge of landscape and regional circumstances where conservation programs are successful on working lands in agricultural production are needed. Converting marginal croplands to grasslands using conservation programs such as the United States Department of Agriculture Conservation Reserve Program (CRP) should be beneficial for many grassland‐...

Haukos, David A.

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Year Published: 2019

Landscape structure and temporal dynamic effects on Wintering Mallard abundance and distributions in the Mississippi alluvial valley

Context Management of wintering waterfowl in North America requires adaptability because constant landscape and environmental change challenges existing management strategies regarding waterfowl habitat use at large spatial scales. Migratory waterfowl including mallards (Anas platyrhynchos) use the lower Mississippi Alluvial Valley (MAV) for...

Herbert, John A.; Chakraborty, Avishek; Naylor, Luke W.; Beattty, William S.; Krementz, David G.

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Year Published: 2019

Capture versus tagging impacts on chum salmon freshwater spawning migration travel times

The spawning migration travel times of chum salmon, Oncorhynchus keta (Walbaum), fitted with gastrically implanted radio tags vs external spaghetti tags were tested for a short [≈60 river km (rkm)] and long migration route (≈730 rkm) on the Koyukuk River, Alaska, USA. Using a novel application of statistical arrival curve models to infer travel...

Sethi, Suresh

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Year Published: 2019

Managing the vanishing North American hunter: A novel framework to address declines in hunters and hunter-generated conservation funds

As long as the funding mechanism supporting state wildlife conservation relies heavily on hunter-generated funds, declines in hunter participation are a threat to the conservation of both game and non-game species. To address options to bolster wildlife agency profit from the sale of hunting licenses, we developed a stage-based, stochastic...

Price-Tack, J.L.; McGowan, Conor P.; Ditchkoff, S.S.; Morse, W.C.; Robinson, O.J.

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Year Published: 2019

Accounting for location uncertainty in azimuthaltelemetry data improves ecological inference

BackgroundCharacterizing animal space use is critical for understanding ecological relationships. Animal telemetry technology has revolutionized the fields of ecology and conservation biology by providing high quality spatial data on animal movement. Radio-telemetry with very high frequency (VHF) radio signals continues to be a useful technology...

Hooten, Mevin B.; Brian D. Gerber; Christopher P. Peck; Mindy B. Rice; Anthony D. Apa; James H. Gammonley; Amy J. Davis

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Year Published: 2019

Optimal treatment allocations in space and time for online control of anemerging infectious disease

A key component in controlling the spread of an epidemic is deciding where, when and to whom to apply an intervention. We develop a framework for using data to inform these decisions in realtime. We formalize a treatment allocation strategy as a sequence of functions, one per treatment period, that map up‐to‐date information on the spread of an...

Laber, Eric B.; Meyer, Nick J.; Reich, Brian J.; Pacifici, Krishna; Collazo, Jaime A.; Drake, John M.

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Year Published: 2019

Lions and leopards coexist without spatial, temporal or demographic effects of interspecific competition

1. Although interspecific competition plays a principle role in shaping species behaviour and demography, little is known about the population-level outcomes of competition between large carnivores, and the mechanisms that facilitate coexistence. 2. We conducted a multi-landscape analysis of two widely distributed, threatened large carnivore...

Fuller, Angela K.; Miller, Jennifer; Pittman, Ross; Mann, Gareth; Balme, Guy