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Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Long-Billed Curlew Nest Site Selection And Success In The Intermountain West, Stephanie E. Coates, Benjamin W. Wright, Jay D. Carlisle
Long-Billed Curlew Nest Site Selection And Success In The Intermountain West, Stephanie E. Coates, Benjamin W. Wright, Jay D. Carlisle
Intermountain Bird Observatory Publications and Presentations
Grassland birds have experienced steeper population declines between 1966 and 2015 than any other bird group on the North American continent, and migratory grassland birds may face threats in all stages of their annual cycle. The grassland‐associated long‐billed curlew (Numenius americanus) is experiencing population declines in regional and local portions of their North American breeding range. The nesting period is an important portion of the annual cycle when curlews may face demographic rate limitations from a suite of threats including predators and anthropogenic disturbance. We compared nest sites to random sites within breeding territories to examine nest site …
Designing Studies Of Predation Risk For Improved Inference In Carnivore-Ungulate Systems, Mark A. Ditmer
Designing Studies Of Predation Risk For Improved Inference In Carnivore-Ungulate Systems, Mark A. Ditmer
Human-Environment Systems Research Center Faculty Publications and Presentations
Quantifying both the lethal and non-lethal (or “risk”) effects of predation has emerged as a major research focus in carnivore-ungulate systems. While numerous studies have examined predation risk and risk effects in recent decades, a lack of standardization in approaches has impeded progress in the field. We provide an overview of five major study design considerations involved in assessing predation risk and responses of prey in carnivoreungulate systems, highlighting how different design choices can impact the strength and scope of inference. First, we stress the importance of distinguishing measures of predation risk (probability of being killed) from measures of risk …
Using Motion-Activated Trail Cameras To Study Diet And Productivity Of Cliff-Nesting Golden Eagles, Jordan T. Harrison, Michael N. Kochert, Benjamin P. Pauli, Julie A. Heath
Using Motion-Activated Trail Cameras To Study Diet And Productivity Of Cliff-Nesting Golden Eagles, Jordan T. Harrison, Michael N. Kochert, Benjamin P. Pauli, Julie A. Heath
Raptor Research Center Publications and Presentations
Studies of cliff-nesting raptors can be challenging because direct observations of nest contents are difficult. Our goals were to develop a protocol for installing motion-activated trail cameras at Golden Eagle (Aquila chrysaetos) nests to record diet information and productivity, and to estimate prey detection probability using different diet study methods. In 2014 and 2015, we installed cameras at 12 Golden Eagle nests with 18–42-d-old nestlings. Following installation, we monitored adult behavior using direct observation and post-installation image review. At two nests, adult eagles did not return to nests or exhibited behaviors suggesting avoidance of the cameras, but returned …
Preferences Of Specialist And Generalist Mammalian Herbivores For Mixtures Versus Individual Plant Secondary Metabolites, Jordan D. Nobler, Jennifer S. Forbey
Preferences Of Specialist And Generalist Mammalian Herbivores For Mixtures Versus Individual Plant Secondary Metabolites, Jordan D. Nobler, Jennifer S. Forbey
Biology Faculty Publications and Presentations
Herbivores that forage on chemically defended plants consume complex mixtures of plant secondary metabolites (PSMs). However, the mechanisms by which herbivores tolerate mixtures of PSMs are relatively poorly understood. As such, it remains difficult to predict how PSMs, singly or as complex mixtures, influence diet selection by herbivores. Although relative rates of detoxification of PSMs have been used to explain tolerance of PSMs by dietary specialist herbivores, few studies have used the rate of detoxification of individual PSMs to understand dietary preferences of individual herbivores for individual versus mixtures of PSMs. We coupled in vivo experiments using captive feeding trials …