Cooperative Research Units

Home

Programs L2 Landing Page

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: 33
Date published: January 22, 2020

Predicted habitat suitability rasters for at-risk herpetofauna species in the longleaf pine system in the Southeast US

The polygon data in the geodatabase represent range-wide habitat suitability model predictions for five species of herpetofauna: gopher tortoise (Gopherus polyphemus), southern hognose snake (Heterodon simus), Florida pine snake (Pituophis melanoleucus mugitus), gopher frog (Lithobates capito), and striped newt (Notophthalmus perstriatus). Collectively, the habitat

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

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...

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.

Filter Total Items: 2,660
Publication Thumbnail
Year Published: 2019

Differences in mosquito communities in six cities in Oklahoma

Vector-borne diseases in the United States have recently increased as a result of the changing nature of vectors, hosts, reservoirs, pathogens, and the ecological and environmental conditions. Current information on vector habitats and how mosquito community composition varies across space and time is vital to successful vector-borne disease...

Bradt, D.; Wormington, J.D.; Long, James M.; Hoback, W.W.; Noden, B.H.

Publication Thumbnail
Year Published: 2019

Migrating bison engineer the green wave

Newly emerging plants provide the best forage for herbivores. To exploit this fleeting resource, migrating herbivores align their movements to surf the wave of spring green-up. With new technology to track migrating animals, the Green Wave Hypothesis has steadily gained empirical support across a diversity of migratory taxa. This hypothesis...

Geremia, Chris; Merkle, Jerod A.; Eacker, Daniel R.; Wallen, Rick L.; White, P. J.; Hebblewhite, Mark; Kauffman, Matthew J.

Publication Thumbnail
Year Published: 2019

Geometric targets for UAS Lidar

Lidar from small unoccupied aerial systems (UAS) is a viable method for collecting geospatial data associated with a wide variety of applications. Point clouds from UAS lidar require a means for accuracy assessment, calibration, and adjustment. In order to carry out these procedures, specific locations within the point cloud must be precisely...

Wilkinson, B.; Lassiter, H.A.; Abd-Elrahman, A.; Carthy, Raymond; Ifju, P.; Broadbent, E.; Grimes, N.

Publication Thumbnail
Year Published: 2019

Population characteristics and the potential suppression of common carp in Lake Spokane, Washington

Common Carp Cyprinus carpio is a nonnative species that often has deleterious effects on aquatic systems. As such, there is interest in suppressing nonnative Common Carp populations in areas where humans have introduced them. The objectives of this study were to 1) provide insight on efficient techniques for capturing Common Carp, 2)...

Feeken, Stacey; Klein, Zachary B.; Quist, Michael C.; Horner, Ned

Publication Thumbnail
Year Published: 2019

Potential threats facing a globally important population of the magnificent frigatebird Fregata magnificens

Tracking of seabirds has been used to identify foraging hotspots, migratory routes and to assess at-sea threats facing populations. One such threat is the potential negative interaction between seabirds and fisheries through incidental by-catch. In 2012, 60 magnificent frigatebirds Fregata magnificens were found dead, entangled in...

Zaluski, S.; Soanes, L.M.; Bright, J.A.; Georges, A.; Jodice, Patrick G. R.; Meyer, K.; Woodfield- Pascoe N.; Green, J.A

Publication Thumbnail
Year Published: 2019

Creating figures in R that meet the AFS style guide: Standardization and supporting script

Visual display of information in scientific and non‐scientific literature is the most efficient way to summarize large amounts data, focus the readers’ attention on patterns, and substantiate the message in the narrative. Figures often represent years of data collection and substantial monetary investment, and it is worth repeating the cliché “a [...

Glassic, Hayley C.; Heim, Kurt C.; Guy, Christopher S.

Publication Thumbnail
Year Published: 2019

Chronic wasting disease—Research by the U.S. Geological Survey and partners

IntroductionChronic wasting disease (CWD) is the only transmissible spongiform encephalopathy, a class of invariably fatal neurodegenerative mammalian diseases associated with a misfolded cellular prion protein found in wild free-ranging animals. Because it has a long incubation period, affected animals in Cervidae (the deer family; referred to as...

Hopkins, M. Camille; Carlson, Christina M.; Cross, Paul C.; Johnson, Christopher J.; Richards, Bryan J.; Russell, Robin E.; Samuel, Michael D.; Sargeant, Glen A.; Walsh, Daniel P.; Walter, W. David
Hopkins, M.C., Carlson, C.M., Cross, P.C., Johnson, C.J., Richards, B.J., Russell, R.E., Samuel, M.D., Sargeant, G.A., Walsh, D.P., and Walter, W.D., 2019, Chronic wasting disease—Research by the U.S. Geological Survey and partners (ver. 2.0, November 2019): U.S. Geological Survey Open-File Report 2019–1109, 29 p., https://doi.org/10.3133/ofr20191109.

Publication Thumbnail
Year Published: 2019

Within-group relatedness and patterns of reproductive sharing and cooperation in the tropical chestnut-crested yuhina

In cooperatively breeding animals, genetic relatedness among group members often determines the extent of reproductive sharing, cooperation and competition within a group. Studies of species for which cooperative behaviour is not entirely based on kinship are key for understanding the benefits favouring the evolution and maintenance of cooperative...

Kaiser, Sara A.; Martin, Thomas E.; Oteyza, Juan C.; Danner, Julie E.; Armstad, Connor E.; Fleischer, Robert C.

Publication Thumbnail
Year Published: 2019

Toward a theory of connectivity among depressional wetlands of the great plains

Functions of inland, freshwater depressional wetlands of the Great Plains are driven by natural disturbance in the form of fluctuating water levels or shifts between wet and dry ecological states. The geographically isolated prairie potholes and playas form broad-scale systems or networks that support biodiversity and provide ecological goods and...

Albanese, Gene; Haukos, David A.

Publication Thumbnail
Year Published: 2019

Age and growth of Freshwater Drum and Gizzard Shad occupying two reservoir-river complexes with different groundwater contributions

Restoring groundwater flow is a management option that improves water temperature regimes and benefits fishes. Although this strategy applies more readily to river systems, the thermal character of reservoirs is heavily influenced by inflowing rivers. We examined differences in age, structure, and growth of both Freshwater Drum Aplodinotus...

Dattilo, J; Shoup, D.E.; Brewer, Shannon K.

Publication Thumbnail
Year Published: 2019

Oyster reefs in northern Gulf of Mexico estuaries harbor diverse fish and decapod crustacean assemblages: A meta-synthesis

Oyster reefs provide habitat for numerous fish and decapod crustacean species that mediate ecosystem functioning and support vibrant fisheries. Recent focus on the restoration of eastern oyster (Crassostrea virginica) reefs stems from this role as a critical ecosystem engineer. Within the shallow estuaries of the northern Gulf of Mexico (nGoM...

LaPeyre, Megan K.; Marshall, D. A.; Miller, L. S.; Humphries, A. T.

Publication Thumbnail
Year Published: 2019

Riverine turtles select habitats maintained by natural discharge regimes in an unimpounded large river

Turtle populations are imperiled worldwide, but limited ecological information from unaltered systems hampers science‐based management and conservation of some species, especially riverine turtles such as the spiny softshell (Apalone spinifera). We therefore investigated movements and spatial habitat selection of 54 A. spinifera in...

Tornabene, Brian J.; Jaeger, Matthew E.; Bramblett, Robert G.; Nelson, Mark; McClenning, Nathan; Watson, Trevor; Ankrum, Alan; Frazer, Kenneth; Reinhold, Ann Marie; Zale, Alexander V.

Under the guidelines of the Cooperative Research Agreement, CRU is required to communicate with funders, cooperators, stakeholders, and the public. CRU maintains outreach pathways and participation among state, federal, university, and private researchers.

Filter Total Items: 28
Halictus ligatus female on an oxeye daisy (Chrysanthemum leucanthemum).
May 29, 2019

Halictus ligatus female on an oxeye daisy (Chrysanthemum leucanthemum)

The center of the composite flower looks like a "landing zone" and has evolved to guide pollinators to its nectar/pollen.

Trail camera field work in Arizona
April 12, 2019

Trail camera field work in Arizona

Ongoing camera monitoring efforts in Southern Arizona to monitor wildlife for the goal of detecting endangered jaguars and ocelots have covered 20 mountain ranges, off and on, from 2012 to 2019.  Currently monitoring 12 Southern Arizona mountain ranges, this project is being conducted exclusively in the field by citizen science volunteers at the University of Arizona under

...
Trail camera field work in Arizona
April 12, 2019

Trail camera field work in Arizona

Ongoing camera monitoring efforts in Southern Arizona to monitor wildlife for the goal of detecting endangered jaguars and ocelots have covered 20 mountain ranges, off and on, from 2012 to 2019.  Currently monitoring 12 Southern Arizona mountain ranges, this project is being conducted exclusively in the field by citizen science volunteers at the University of Arizona under

...
Trail camera field work in Arizona
April 12, 2019

Trail camera field work in Arizona

Ongoing camera monitoring efforts in Southern Arizona to monitor wildlife for the goal of detecting endangered jaguars and ocelots have covered 20 mountain ranges, off and on, from 2012 to 2019.  Currently monitoring 12 Southern Arizona mountain ranges, this project is being conducted exclusively in the field by citizen science volunteers at the University of Arizona under

...
Assessing the Functional Equivalency of Hawaiian fishponds
July 29, 2018

Assessing the Functional Equivalency of Hawaiian fishponds

Hawaiian fishponds are important cultural and economic resources for native Hawaiians as they are an important component of a sophisticated, integrated food production system. However, changing demographics and systems of land ownership result in declines in the use and upkeep of Hawaiian fishponds throughout the 19th century. The cultural value of Hawaiian fishponds has

...
Assessing the Functional Equivalency of Hawaiian fishponds
July 29, 2018

Assessing the Functional Equivalency of Hawaiian fishponds

Hawaiian fishponds were important cultural and economic resources for native Hawaiians as they were an important component of a sophisticated, integrated food production system. However, changing demographics and systems of land ownership resulted in a decline in the use and upkeep of Hawaiian fishponds throughout the 19th century. The cultural value of Hawaiian fishponds

...
Canada lynx
June 21, 2018

Canada Lynx

– Scientists at the USGS Massachusetts Cooperative Fish and
Wildlife Research Unit at the University of Massachusetts Amherst, in
collaboration with The Rockefeller University’s Vertebrate Genome Laboratory,
New York, are releasing to a public repository at the vertebrate lab, for use by
geneticists, conservationists and other researchers around the

...
Alligator Hatchlings
December 31, 2017

Alligator Hatchlings

Crocodilians are one of the few reptile taxa that exhibit parental care. In alligators, following nest construction, females stay nearby in a guard hole, and are known to defend their nests against predators or other intruders. At the end of the 60-day incubation period, alligator hatchlings will vocalize from within the egg, to signal to the mother that they are ready to

...
Honey bee (Apis mellifera) foraging on coffee flowers of Coffea canephora and C. arabica plants
April 6, 2017

Honey bee pollination of coffee plants

Researcher swabs the body of a honeybee with fuschin gel to later use to identify the pollen particles on the bee's body and determine what plants the bee visited. The overal purpose of the project is to enable the Department of Applied Ecology of North Carolina State University (NCSU), Center for Landscape Conservation (CLC), and the Natural Resources Conservation Service

...
American Alligator
December 31, 2016

American Alligator

USGS and other scientists have studied in-depth alligator populations in Florida and Louisiana, but basic ecological knowledge is lacking for populations at the northern edge of their range. For example, differences in climate and habitat between the southern and northern portions of the range limit the applicability of findings from other studies to South Carolina

...
American Alligator
December 31, 2016

Largest American Alligator Satellite Telemetry-Tracking Study

South Carolina alligators occupy a patchwork of diverse habitats, including rivers, lakes, wooded swamps, tidal marshes, and impounded freshwater wetlands. As a mobile, opportunistic predator, alligators seasonally adjust their habitat use for feeding. For example, some Florida alligators venture into brackish water habitats to feed on nutrient-rich blue crabs during the

...
Golden Eagle
December 31, 2016

Golden eagle fitted with Global Positioning System (GPS) backpack

Reports of golden eagle mortality linked to wind energy facilities are cause for concern especially when coupled with the knowledge that golden eagles move great distances between breeding and wintering areas. Mortalities at a particular wind energy facility can consequently affect breeding populations of golden eagles at local and continent-wide scales. Information is

...
Filter Total Items: 14
Date published: September 29, 2014

Wind Turbine or Tree? Certain Bats Might Not Know

Certain bats may be approaching wind turbines after mistaking them for trees, according to a study published in the Proceedings of the National Academy of Sciences.

Date published: February 12, 2014

Identifying Bats By Sound

Recording bats' echolocation "calls" is the most efficient and least intrusive way of identifying different species of bats in a given area, providing insight into some populations that have been decimated by white-nose syndrome.