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: May 18, 2020

Migration Corridors of Mule Deer in the Kaibab North Herd in Arizona

Mule deer of the Kaibab North herd on the Kaibab Plateau are treasured for their historic and contemporary significance in North America. They are the densest population of mule deer in Arizona, with an estimate of 10,200 individuals in 2019. This report compiles two research efforts, the first completed by Arizona Game and Fish Department in 2014, and the second from Utah Division of Wil

Date published: May 4, 2020

At-sea movements of Masked Boobies from Pedro Cays, Jamaica, 2012

As part of a larger effort to examine individual-based movement patterns and habitat use at sea for seabirds in the Caribbean, a tracking study of Masked Boobies (Sula dactylatra) breeding on the Pedro Cays, Jamaica, was implemented in 2012. This population is one of the largest of the few breeding groups in the region. The Masked Booby is considered to be declining and regionally-threa

Date published: April 28, 2020

Bio-engineered oyster reef monitoring, Eloi Bay, Louisiana, 2017-2019

This dataset includes annual encrusting organism (oyster, mussel, barnacle) counts and density (ind m-2), and oyster shell height (mm) data for five bio-engineered reef designs: OysterbreakTM (OB), Wave Attenuating Device® (WAD), Reef Ball™ (rows of two, RFB2; rows of three, RFB3), ReefBLK℠ (RBL), and ShoreJAX™ (JAX%

Date published: March 24, 2020

Blood Analytes in Brown Pelican in the Northern Gulf of Mexico (2013-2015)

The Eastern Brown Pelican (Pelecanus occidentalis carolinensis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore islands in subtropical and tropical North American waters. It breeds between March and August, laying 2–3 eggs and raising 1–2 chicks per year. The species is facultatively migratory during nonbreeding, with some

Date published: March 24, 2020

Polycyclic Aromatic Hydrocarbons in Brown Pelican in the Northern Gulf of Mexico (2013-2015)

The datasets stored in this page summarize polycyclic aromatic hydrocarbon (PAH) referece data and values collected from Brown Pelican nestlings and breeding adults from 2013-2015 in the Northern Gulf of Mexico at 9 breeding colonies from Texas to the Florida Panhandle.The datasets and FGDC-compliant metadata are available as .zip files. Dataset "Polycyclic Aromatic Hydrocarbons in Brown

Date published: February 26, 2020

Reproductive Physiology of Brown Pelican Along the Coast of Alabama, 2017-2018

The datasets stored in this folder summarize reproductive data for Brown Pelicans nesting on Gaillard and Cat Islands, Alabama, in 2017 and 2018. Data include nest and nestling survival, nest site characteristics, environmental covariates, and temperatures recorded inside nests. The datasets and FGDC-compliant metadata are available as .zip files. Dataset "Reproductive Physiology of

Date published: February 24, 2020

Shapefiles and hydraulic models for selected streams in Stark County, Ohio.

Digital flood-inundation maps were created by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District and the Stark County Commissioners as part of a Federal Emergency Management Agency (FEMA) Flood Insurance Study (FIS). The flood-inundation maps show estimates of the areal extent corresponding to the 1% and 0.2% annual-exceedance probab

Date published: February 24, 2020

Model archive for the hydraulic modeling of selected streams in Stark County, Ohio.

Dataset is a model archive containing all relevant files to create digital flood-inundation maps by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District and the Stark County Commissioners as part of a Federal Emergency Management Agency (FEMA) Flood Insurance Study (FIS). The flood-inundation maps show estimates of the areal extent corresp

Date published: February 24, 2020

Input and output shapefiles used in the hydraulic modeling for selected streams in Stark County, Ohio.

Digital flood-inundation maps were created by the U.S. Geological Survey (USGS) in cooperation with the Muskingum Watershed Conservancy District and the Stark County Commissioners as part of a Federal Emergency Management Agency (FEMA) Flood Insurance Study (FIS). The flood-inundation maps show estimates of the areal extent corresponding to the 1% and 0.2% annual-exceedance probab

Date published: January 22, 2020

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

The raster 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 22, 2020

Expert responses of influential habitat attributes for at-risk species

The data indicate the number of experts (out of 27 who were involved in this expert elicitation process) who rated a set of environmental, ecological, climatic, anthropogenic, or other attributes as highly, somewhat, or slightly influential to habitat and species conditions. Experts provided responses for the gopher tortoise (Gopherus polyphemus), southern hognose snake (H

Date published: January 22, 2020

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

The raster 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

Filter Total Items: 2,756
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Year Published: 2019

Incorporating citizen science data in spatially explicit integrated population models

Information about population abundance, distribution, and demographic rates is critical for understanding a species’ ecology and for effective conservation and management. To collect data over large spatial and temporal extents for such inferences, especially for species with low densities or wide distributions, citizen science can be an efficient...

Sun, Catherine C.; Royle, Andy; Fuller, Angela K.

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Year Published: 2019

Wild canid distribution and co-existence in a natural–urban matrix of the Pioneer Valley of Western Massachusetts

Although development and urbanization are typically believed to have negative impacts on carnivoran species, some species can successfully navigate an urban matrix. Sympatric carnivorans compete for limited resources in urban areas, likely with system-specific impacts to their distributions and activity patterns. We used automatically triggered...

LeFlore, Eric G.; Fuller, Todd K.; Finn, John T.; Organ, John F.; DeStefano, Stephen

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Year Published: 2019

A three-pipe problem: Dealing with complexity to halt amphibian declines

Natural resource managers are increasingly faced with threats to managed ecosystems that are largely outside of their control. Examples include land development, climate change, invasive species, and emerging infectious diseases. All of these are characterized by large uncertainties in timing, magnitude, and effects on species. In many cases, the...

Converse, Sarah J.; Campbell Grant, Evan H.

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Year Published: 2019

Predicting hydrologic disturbance of streams using species occurrence data

Aquatic organisms have adapted over evolutionary time-scales to hydrologic variability represented by the natural flow regime of rivers and streams in their unimpaired state. Rapid landscape change coupled with growing human demand for water have altered natural flow regimes of many rivers and streams on a global scale. Climate non-stationarity is...

Fox, J.T.; Magoulick, Daniel D.

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Year Published: 2019

Effect of hydrologic, geomorphic, and vegetative conditions on avian communities in the Middle Rio Grande of New Mexico

We evaluated relationships among hydrogeomorphology, vegetation structure and composition, and avian communities among three subreaches of the San Acacia Reach of the Middle Rio Grande (MRG) River of New Mexico. The subreaches varied in degradation, with Subreach 1 being severely entrenched and hydrologically disconnected, Subreach 2 being the...

Hamilton, S. W.; King, Sammy L.; Dello Russo, G.

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Year Published: 2019

Winter and spring diet of the orangebelly darter, Etheostoma radiosum, among tributaries of the Lower Mountain Fork River

Little is known about prey use by the orangebelly darter, Etheostoma radiosum, and what is known has been described from relatively large river systems. We examined prey use by orangebelly darters from first- and second-order tributaries in the Lower Mountain Fork River of southeastern Oklahoma. Adult darters (n = 141) were captured from...

Reed, M. L.; Hoback, W. W.; Long, James M.

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Year Published: 2019

Looking for love under the ice: Using passive acoustics to detect burbot (Lota lota: Gadidae) spawning activity

Burbot (Lota lota: Gadidae) is a difficult species to manage effectively due to its preference for deep‐water habitats and under‐ice spawning behaviour, resulting in a poor understanding of its reproductive activity. However, the use of acoustic signalling by burbot as part of their mating system has recently been described and this behaviour may...

Grabowski, Timothy B.; Young, Shawn P.; Cott, Peter A.

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Year Published: 2019

Selecting ecological models using multi-objective optimization

Choices in ecological research and natural resource management require balancing multiple, often competing objectives. Examples include maximizing species persistence in a wildlife conservation context, while minimizing cost, or balancing opposing stakeholder objectives when managing wildlife populations. Multiple-objective...

Williams, Perry J.; Kendall, William L.; Hooten, Mevin

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Year Published: 2019

A comparison of coffee floral traits under two different agricultural practices

Floral traits and rewards are important in mediating interactions between plants and pollinators. Agricultural management practices can affect abiotic factors known to influence floral traits; however, our understanding of the links between agricultural practices and floral trait expression is still poorly understood. Variation in floral...

Prado, S.G.; Collazo, Jaime; Stevenson, P.C.; Irwin, R.E.

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Year Published: 2019

Spatially-structured statistical network models for landscape genetics

A basic understanding of how the landscape impedes, or creates resistance to, the dispersal of organisms and hence gene flow is paramount for successful conservation science and management. Spatially structured ecological networks are often used to represent spatial landscape‐genetic relationships, where nodes represent individuals or populations...

Hooten, Mevin

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Year Published: 2019

Higher nest predation favors rapid fledging at the cost of plumage quality in nestling birds

Life-history theory predicts that rapid growth comes at a cost to offspring quality and adult longevity. However, trade-offs have been examined primarily based on proximate variation within species rather than evolved differences across species. Evolved differences are important to examine because species may co-evolve mechanisms to reduce long-...

Martin, Thomas E.; Lea M. Callan1; Frank A. La Sorte2; Vanya G. Rohwer1, 4

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Year Published: 2019

Spatiotemporal distribution of waterfowl disease outbreaks in Kansas

No abstract available.

Haukos, David A.