Search Results - "Wilson, Ryan R."

Increased Land Use by Chukchi Sea Polar Bears in Relation to Changing Sea Ice Conditions by Rode, Karyn D, Wilson, Ryan R, Regehr, Eric V, St Martin, Michelle, Douglas, David C, Olson, Jay

“…Recent observations suggest that polar bears (Ursus maritimus) are increasingly using land habitats in some parts of their range, where they have minimal…”
Get full text

Effects of roads on individual caribou movements during migration by Wilson, Ryan R., Parrett, Lincoln S., Joly, Kyle, Dau, Jim R.

“…Long distance migrations by large mammals are increasingly imperiled by human development. We studied autumn migratory patterns of caribou (Rangifer tarandus)…”
Get full text

Aerial survey estimates of polar bears and their tracks in the Chukchi Sea by Conn, Paul B, Chernook, Vladimir I, Moreland, Erin E, Trukhanova, Irina S, Regehr, Eric V, Vasiliev, Alexander N, Wilson, Ryan R, Belikov, Stanislav E, Boveng, Peter L

“…Polar bears are of international conservation concern due to climate change but are difficult to study because of low densities and an expansive, circumpolar…”
Get full text

Identifying reliable indicators of fitness in polar bears by Rode, Karyn D, Atwood, Todd C, Thiemann, Gregory W, St. Martin, Michelle, Wilson, Ryan R, Durner, George M, Regehr, Eric V, Talbot, Sandra L, Sage, George K, Pagano, Anthony M, Simac, Kristin S

“…Animal structural body size and condition are often measured to evaluate individual health, identify responses to environmental change and food availability,…”
Get full text

A hierarchical distance sampling model to estimate spatially explicit sea otter density by Wilson, Ryan R., St. Martin, Michelle, Beatty, William S.

“…Wildlife managers often rely on analyses conducted prior to the widespread adoption of hierarchical models which can lead to questions about the accuracy of…”
Get full text

Intrapopulation differences in polar bear movement and step selection patterns by Wilson, Ryan R, Martin, Michelle St, Regehr, Eric V, Rode, Karyn D

“…The spatial ecology of individuals often varies within a population or species. Identifying how individuals in different classes interact with their…”
Get full text

Summer resource selection and identification of important habitat prior to industrial development for the Teshekpuk Caribou Herd in northern Alaska by Wilson, Ryan R, Prichard, Alexander K, Parrett, Lincoln S, Person, Brian T, Carroll, Geoffry M, Smith, Melanie A, Rea, Caryn L, Yokel, David A

“…Many caribou (Rangifer tarandus) populations are declining worldwide in part due to disturbance from human development. Prior to human development, important…”
Get full text

Polar Bear-Grizzly Bear Interactions During the Autumn Open-Water Period in Alaska by Miller, Susanne, Wilder, James, Wilson, Ryan R.

“…Reduction of summer sea ice extent has led some polar bear (Ursus maritimus) populations to increase their use of land during the summer/autumn open-water…”
Get full text

Seismic Survey Design and Effects on Maternal Polar Bear Dens by WILSON, RYAN R., DURNER, GEORGE M.

“…Large-scale industrial activities can have negative effects on wildlife populations. Some of these effects, however, could be reduced with effective planning…”
Get full text

Potential impacts of offshore oil spills on polar bears in the Chukchi Sea by Wilson, Ryan R., Perham, Craig, French-McCay, Deborah P., Balouskus, Richard

“…Sea ice decline is anticipated to increase human access to the Arctic Ocean allowing for offshore oil and gas development in once inaccessible areas. Given the…”
Get full text

Mapping potential effects of proposed roads on migratory connectivity for a highly mobile herbivore using circuit theory by Fullman, Timothy J., Wilson, Ryan R., Joly, Kyle, Gustine, David D., Leonard, Paul, Loya, Wendy M.

“…Migration is common worldwide as species access spatiotemporally varying resources and avoid predators and parasites. However, long-distance migrations are…”
Get full text

Increased pathogen exposure of a marine apex predator over three decades by Rode, Karyn D, Van Hemert, Caroline, Wilson, Ryan R, Woodruff, Susannah P, Pabilonia, Kristy, Ballweber, Lora, Kwok, Oliver, Dubey, Jitender P

“…Environmental changes associated with global warming create new opportunities for pathogen and parasite transmission in Arctic wildlife. As an apex predator…”
Get full text

Identifying indicators of polar bear population status by Rode, Karyn D., Wilson, Ryan R., Crawford, Justin A., Quakenbush, Lori T.

“…[Display omitted] •Polar bear body condition and recruitment are related to prey and sea ice variables.•These relationships can serve as indicators of polar…”
Get full text

Modeling spatiotemporal abundance and movement dynamics using an integrated spatial capture–recapture movement model by Hostetter, Nathan J., Regehr, Eric V., Wilson, Ryan R., Royle, J. Andrew, Converse, Sarah J.

“…Animal movement is a fundamental ecological process affecting the survival and reproduction of individuals, the structure of populations, and the dynamics of…”
Get full text

Seal body condition and atmospheric circulation patterns influence polar bear body condition, recruitment, and feeding ecology in the Chukchi Sea by Rode, Karyn D., Regehr, Eric V., Bromaghin, Jeffrey F., Wilson, Ryan R., St. Martin, Michelle, Crawford, Justin A., Quakenbush, Lori T.

“…Polar bears (Ursus maritimus) are experiencing loss of sea ice habitats used to access their marine mammal prey. Simultaneously, ocean warming is changing…”
Get full text

Harvesting wildlife affected by climate change: a modelling and management approach for polar bears by Regehr, Eric V., Wilson, Ryan R., Rode, Karyn D., Runge, Michael C., Stern, Harry L.

“…1. The conservation of many wildlife species requires understanding the demographic effects of climate change, including interactions between climate change…”
Get full text

Invariant polar bear habitat selection during a period of sea ice loss by Wilson, Ryan R., Regehr, Eric V., Rode, Karyn D., St Martin, Michelle

“…Climate change is expected to alter many species' habitat. A species' ability to adjust to these changes is partially determined by their ability to adjust…”
Get full text

The post-emergence period for denning Polar Bears: phenology and influence on cub survival by Andersen, Erik M., Wilson, Ryan R., Rode, Karyn D., Durner, George M., Atwood, Todd C., Gustine, David D.

“…Among polar bears (Ursus maritimus), only parturient females den for extended periods, emerging from maternal dens in spring after having substantially…”
Get full text

Increased Arctic sea ice drift alters adult female polar bear movements and energetics by Durner, George M., Douglas, David C., Albeke, Shannon E., Whiteman, John P., Amstrup, Steven C., Richardson, Evan, Wilson, Ryan R., Ben‐David, Merav

“…Recent reductions in thickness and extent have increased drift rates of Arctic sea ice. Increased ice drift could significantly affect the movements and the…”
Get full text

Integrated Population Modeling Provides the First Empirical Estimates of Vital Rates and Abundance for Polar Bears in the Chukchi Sea by Regehr, Eric V., Hostetter, Nathan J., Wilson, Ryan R., Rode, Karyn D., Martin, Michelle St, Converse, Sarah J.

“…Large carnivores are imperiled globally, and characteristics making them vulnerable to extinction (e.g., low densities and expansive ranges) also make it…”
Get full text