Cooperative Research Units


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The Cooperative Research Units Program conducts research on a wide range of disciplines related to fish, wildlife, and natural resource management. Our 40 Units collectively conduct research on virtually every type of North American ecological community. 

Data and Tools Technical Publications
Filter Total Items: 104
Date published: January 21, 2020

Southern hognose snake Species Status Assessment data products

The three datasets were used in a model estimating the current and future persistence of 222 populations of southern hognose snakes, as estimated as part of the USFWS Species Status Assessment. Because these datasets contain information about sensitive species at risk of overcollection and harassment, they do not contain any spatial identifying information. The "HESIM_locs" dataset conta

Date published: December 5, 2019

Mercury concentrations in American alligators in South Carolina, 2010-2017

This dataset comprises whole blood mercury concentrations, sex, predicted age, snout-vent length, and body mass index in American alligators (Alligator mississippiensis) captured at Yawkey Wildlife Center, South Carolina, from 2010 to 2017. Funding for this study was provided by the U.S. Geological Survey (Cooperative Agreement nos. G12AC20329, G15AC00264) and the South Car

Date published: October 11, 2019

GPS tracking of Brown Pelican in the South Atlantic Bight during cyclonic activity (2017-2018)

This dataset comprises GPS locations analyzed in Wilkinson et al. (20XX): 14,478 deployed GPS locations, for 32 Eastern brown pelicans tracked during Hurricanes Irma, Florence, and Michael in autumn 2017 and 2018, respectively. Funding for this study was provided by the U.S. Geological Survey Ecosystem Missions Area, and facilitated by Mona Khalil (USGS). Among seabirds%2

Date published: March 19, 2019

Data Supporting a Framework to Incorporate Established Conservation Networks into Freshwater Conservation Planning

This data set provides the results of a conservation prioritization analysis for wadeable streams in Missouri, USA. Higher values (Maximum of 1) represent higher conservation value. Conservation values were derived using Zonation conservation planning software which used species distribution models, a prioritization algorithm (either Core-Area or Additive Benefit), species weighting

Date published: January 1, 2019

Bluegill catch rates and total length distributions among four sampling gears used in two Wisconsin lakes 2017

Data represent catch rates and total lengths of bluegill (Lepomis macrochirus) collected from two northern Wisconsin lakes using four different sampling gears.The data include number of bluegills captured in individual units of effort for 4 different sampling gears (Isermann_Bluegill_Sampling_catch.csv) and total lengths measured for a subsample of those fish (Isermann_Bluegill_Sampling

Date published: December 3, 2018

Wyoming Range Stream Data (2012-2016)

This data release supports the manuscript entitled "Multiple approaches to surface water quality assessment provide insight for small streams experiencing oil and natural gas development" (DOI )and includes two data sets: 1) Mean daily discharge, temperature, and conductivity data from three stream sites in the Wyoming Range for summers 2012-2016; 2) Suspended sediment and mac

Date published: June 6, 2018

Avian point count survey-specific data in Northern New England 2013 to 2015

Avian point count, vegetation, and management data from surveys in Northern New England at four National Wildlife Refuges (NWRs), Baxter State Park, and prviate lands in Northern Maine surveyed during the breeding and postbreeding season bewteen 1 June and 4 August 2013 to 2015. NWRs include Nulhegan (Silvio O. Conte), Umbagog, Moosehorn, and Aroostook. This data release inc

Date published: February 15, 2018

Fish collection and hydrological data for oxbows in western Iowa

The data set associated with this metadata is included in three separate csv files: 'Occupancy_Data', 'Stage_Raw', and 'Flood_Stage_Height'. 'Occupancy_Data' was used to fit the dynamic occupancy models and includes 17 columns: Time: time periods numbered 1 to 5; 'Oxbow': individual oxbows numbered 1 through 10; 'OxbowName': the name of each oxbow; %2

Date published: February 15, 2018

Habitat and fish field survey data from Wyoming Range streams in 2012 and 2013

Stream habitat characteristics, energy development metrics, and fish catch per unit effort data for 91 sites (100m stream reach) sampled in the summers of 2012 and 2013.We sampled four streams in the Dry Piney Drainage (Dry Piney, Beaver Dam, Black Canyon, and North Black Canyon), five in the Fogarty Drainage (North and South Fogarty, North and South Pine Grove, and Sa

Date published: January 1, 2018

Activity patterns in regional and long-distance migrant bat species during the fall and spring along ridgelines in the central Appalachians, 2015-2017

Data contain zero-crossing, frequency acoustic detector locations, date to hour, species of bats recorded and identified and various wind and precipitation values associated with either day or hour for ridges,sideslopes and valleys at 5 locations in western Virginia's Appalachian Mountains.

Date published: January 1, 2018

Activity patterns of cave-dwelling bat species during pre-hibernation swarming and post-hibernation emergence in the central Appalachians

Bat activity around known hibernacula in Virginia and West Virginia portion of the central Appalachians during the fall swarm and spring emergence, 2015-2017

Date published: January 1, 2018

Amphibian Occupancy and Effects of Habitat Use on Pesticide Exposure in Iowa Wetlands

Amphibians living in agricultural areas encounter many challenges. Two factors affecting individuals in these landscapes are habitat loss and pesticides. This thesis focuses on amphibians using agricultural wetlands in Iowa, where row crops such as corn and soybeans dominate the landscape. The goal of my first study was to determine the influences of site characteristics on amphibian presence...

Filter Total Items: 2,756
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Year Published: 2019

The complimentary role of lentic and lotic habitats for Arctic grayling in a complex stream-lake network in Arctic Alaska

Lakes can be important to stream dwelling fishes, yet how individuals exploit habitat heterogeneity across complex stream-lake networks is poorly understood. Furthermore, despite growing awareness that intermittent streams are widely used by fish, studies documenting use of seasonally accessible lakes remain scarce. We studied Arctic grayling (...

Wipfli, Mark S.; Kurt C. Heim1; Christopher D. Arp2; Matthew S. Whitman3

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Year Published: 2019

Latitude and daily-weather effects on gobbling activity of wild turkeys in Mississippi

Weather has been recognized as a density independent factor influencing the abundance, distribution, and behavior of vertebrates. Male wild turkeys’ (Meleagris gallopavo) breeding behavior includes vocalizations and courtship displays to attract females, the phenology of which can vary with latitude. State biologists design spring turkey-hunting...

Palumbo, Matthew D.; Vilella, Francisco; Wang, Guiming; Strickland, Bronson K.; Godwin, Dave; Dixon, P. Grady; Rubin, Benjamin D.; Lashley, Marcus A.

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Year Published: 2019

Adaptive management of flows from R.L. Harris Dam (Tallapoosa River, Alabama)—Stakeholder process and use of biological monitoring data for decision making

Adaptive management has been applied to problems with multiple conflicting objectives in various natural resources settings to learn how management actions affect divergent values regarding system response. Hydropower applications have only recently begun to emerge in the field, yet in the specific example reported herein, stakeholders invested in...

Irwin, Elise R.; Irwin, Elise R.; Freeman, Mary; Peterson, James; Kennedy, Kathryn D.M.; Lloyd, M. Clint; Ouellette Coffman, Kristie M.; Kosnicki, Ely; Hess, Tom
Irwin, E.R., ed., 2019, Adaptive management of flows from R.L. Harris Dam (Tallapoosa River, Alabama)—Stakeholder process and use of biological monitoring data for decision making: U.S. Geological Survey Open-File Report 2019–1026, 93 p.,

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Year Published: 2019

Reservoir diel water quality patterns relative to riparian shade

Investigations into the effects of riparian shade on water quality have focused on streams, with less emphasis on natural lakes, and almost no attention given to reservoirs. In view of this gap, our objective was to assess diel water quality patterns in the nearshore zone of a reservoir and test whether diel patterns differed relative to the...

Miranda, Leandro E.; Raines, C.D.

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Year Published: 2019

Fish assemblage structure and fisheries resources in Puerto Rico’s riverine estuaries

Tropical estuaries are diverse and productive habitats with respect to their fish assemblages and associated fisheries, but these ecosystems and fisheries are imperiled by multiple anthropogenic threats. Despite the economic, social, and biodiversity value of tropical estuarine fish assemblages, they are poorly understood, especially those on...

Engman, A.C.; Kwak, Thomas J.; Fischer, J.R.; Lilyestrom, C.G.

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Year Published: 2019

Integrating fish assemblage data, modeled stream temperatures, and thermal tolerance metrics to develop thermal guilds for water temperature regulation: Wyoming case study

Many streams are experiencing increased average temperatures due to anthropogenic activity and climate change. As a result, surface water temperature regulation is critical for preserving a diverse stream fish species assemblage. The development of temperature regulations has generally been based on laboratory measurements of individual species'...

Mandeville, Caitlin P.; Rahel, Frank J.; Patterson, Lindsay S.; Walters, Annika W.

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Year Published: 2019

Bats in a changing landscape: Linking occupancy and traits of a diverse montane bat community to fire regime

1. Wildfires are increasing in incidence and severity across the western US, leading to changes in forest structure and wildlife habitats. Knowledge of how species respond to fire-driven habitat changes in these landscapes is limited and generally disconnected from our understanding of adaptations that underpin responses to fire. 2. We aimed to...

Webb, Elisabeth B.; Blakely, R.V.; Kesler, D.C.; Siegel, R.B.; Barrios, D.C.; Johnson, J.M.

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Year Published: 2019

The rise of an apex predator following deglaciation

AimSea otters (Enhydra lutris) are an apex predator of the nearshore marine community and nearly went extinct at the turn of the 20th century. Reintroductions and legal protection allowed sea otters to re‐colonize much of their former range. Our objective was to chronicle the colonization of this apex predator in Glacier Bay, Alaska, to help...

Hooten, Mevin; Esslinger, George G.

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Year Published: 2019

Future directions to escalate benefits of stepping-stone approach for conservation translocations

Through a reintroduction case study on the critically endangered Vancouver Island marmot (Marmota vancouverensis), we introduced a ‘stepping-stone’ approach which utilizes the transition of released individuals among populations to maximize demographic growth potential (Lloyd et al. 2019). We greatly appreciate and hereby reflect on the...

Lloyd, N.A.; Hostetter, N.J.; Jackson, C.L.; Converse, Sarah J.; Moehrenschlager, A.

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Year Published: 2019

Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA

Given high likelihood of regional extirpation of several once-common bat species in eastern North America from White-nose Syndrome, it is critical that impacts of forest management activities such as prescribed fire are known to minimize potentially additive negative effects on bat populations. Historic wildfires may offer a suitable surrogate to...

Ford, W. Mark; Austin, Lauren V.; Alexander Silvis; Powers, Karen E.

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Year Published: 2019

Largemouth bass natural history

No abstract available.

Miranda, Leandro E.

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Year Published: 2019

Changes in body condition and diet of lotic Smallmouth Bass across two flow regimes during summer months at the southern extent of their native range

The Ozark Plateau is located at the southern extent of native Smallmouth Bass Micropterus dolomieu range and water temperature and drought conditions during summer months may potentially affect growth of Smallmouth Bass in this region. Groundwater streams in the region do not warm to the same extent as runoff streams during summer months and could...

Middaugh, Christopher R.; Magoulick, Daniel D.