Cooperative Research Units
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Seasonal food habits of introduced blue catfish in Lake Oconee, Georgia
Blue catfish (Ictalurus furcatus) are native to the Coosa River drainage in northwest Georgia but have been widely introduced outside of this range including Lake Oconee, a 7677-ha impoundment on the Oconee River in central Georgia. Blue catfish abundance and growth rates have increased dramatically since their introduction in Lake Oconee, but...Jennings, Cecil A.; Mitchell, Geoffrey E.; Nelson, Chris
The non-linear, interactive effects of population density and climate drive the geographical patterns of waterfowl survival
On-going climate change has major impacts on ecological processes and patterns. Understanding the impacts of climate on the geographical patterns of survival can provide insights to how population dynamics respond to climate change and provide important information for the development of appropriate conservation strategies at regional scales...Zhao, Qing; Boomer, G. Scott; Kendall, William L.
Wildlife habitat management on college and university campuses
With the increasing involvement of higher education institutions in sustainability movements, it remains unclear to what extent college and university campuses address wildlife habitat. Many campuses encompass significant areas of green space with potential to support diverse wildlife taxa. However, sustainability rating systems generally...Bosci, Tierney; Warren, Paige S.; Harper, Rick W.; DeStefano, Stephen
Factors influencing elk recruitment across ecotypes in the Western United States
Ungulates are key components in ecosystems and economically important for sport and subsistence harvest. Yet the relative importance of the effects of weather conditions, forage productivity, and carnivores on ungulates are not well understood. We examined changes in elk (Cervus canadensis) recruitment (indexed as age ratios) across 7 states and 3...Lukacs, Paul M.; Mitchell, Michael S.; Hebblewhite, Mark; Johnson, Bruce K.; Johnson, Heather; Kauffman, Matthew J.; Proffitt, Kelly M.; Zager, Peter; Brodie, Jedediah; Hersey, Kent R.; Holland, A. Andrew; Hurley, Mark; McCorquodale, Scott; Middleton, Arthur; Nordhagen, Matthew; Nowak, J. Joshua; Walsh, Daniel P.; White, P.J.
Landscape connectivity for bobcat (Lynx rufus) and lynx (Lynx canadensis) in the Northeastern United States
Landscape connectivity is integral to the persistence of metapopulations of wide ranging carnivores and other terrestrial species. The objectives of this research were to investigate the landscape characteristics essential to use of areas by lynx and bobcats in northern New England, map a habitat availability model for each species, and explore...Farrell, Laura E.; Levy, Daniel M.; Donovan, Therese M.; Mickey, Ruth M.; Howard, Alan; Vashon, Jennifer; Freeman, Mark; Royar, Kim; Kilpatrick, C. William
Weather and landscape factors affect white-tailed deer neonate survival at ecologically important life stages in the Northern Great Plains
Offspring survival is generally more variable than adult survival and may limit population growth. Although white-tailed deer neonate survival has been intensively investigated, recent work has emphasized how specific cover types influence neonate survival at local scales (single study area). These localized investigations have often led to...Michel, Eric S.; Jenks, Jonathan A.; Kaskie, Kyle D.; Klaver, Robert W.; Jensen, William F.
Incorporating an approach to aid river and reservoir fisheries in an altered landscape
Reservoir construction for human-use services alters connected riverine flow patterns and influences fish production. We sampled two pelagic fishes from two rivers and two reservoirs and related seasonal and annual hydrology patterns to the recruitment and growth of each species. River and reservoir populations of Freshwater Drum Aplodinotus...Brewer, Shannon K.; Shoup, Daniel E.; Dattillo, John
Bat activity following restoration prescribed burning in the central Appalachian Upland and riparian habitats
After decades of fire suppression in eastern North America, land managers now are prioritizing prescribed fire as a management tool to restore or maintain fire-adapted vegetation communities. However, in long—fire-suppressed landscapes, such as the central and southern Appalachians, it is unknown how bats will respond to prescribed fire in both...Austin, Lauren V.; Silvis, Alexander; Ford, W. Mark; Muthersbaugh, Michael; Powers, Karen E.
Efficacy of using data from angler-caught Burbot to estimate population rate functions
The effective management of a fish population depends on the collection of accurate demographic data from that population. Since demographic data are often expensive and difficult to obtain, developing cost‐effective and efficient collection methods is a high priority. This research evaluates the efficacy of using angler‐supplied data to monitor a...Brauer, Tucker A.; Rhea, Darren T.; Walrath, John D.; Quist, Michael C.
Evaluating the conservation potential of tributaries for native fishes in the Upper Colorado River Basin
We explored the conservation potential of tributaries in the upper Colorado River basin by modeling native fish species richness as a function of river discharge, temperature, barrier‐free length, and distance to nearest free‐flowing main‐stem section. We investigated a historic period prior to large‐scale water development and a contemporary...Laub, Brian G.; Thiede, Gary P.; Macfarlane, William W.; Budy, Phaedra
Factors impacting hunter access to private lands in southeast Minnesota
White-tailed deer (Odocoileus virginianus) have important socioeconomic and ecological impacts in the United States. Hunting is considered to be important for the effective management of deer and relies on access to privately owned lands. In 2013, we surveyed nonindustrial private landowners in southeast Minnesota and created two logit models to...Walberg, Eric; Cornicelli, Louis; Fulton, David C.
Habitat mosaics and path analysis can improve biological conservation of aquatic biodiversity in ecosystems with low-head dams
Conserving native biodiversity depends on restoring functional habitats in the face of human-induced disturbances. Low-head dams are a ubiquitous human impact that degrades aquatic ecosystems worldwide. To improve our understanding of how low-head dams impact habitat and associated biodiversity, our research examined complex interactions...Hitchman, Sean M.; Mather, Martha E.; Smith, Joseph M.; Fencl, Jane S.