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: 104
Date published: November 9, 2020

Migration Routes of Elk in Fossil Buttes Population in Wyoming

The Fossil Butte (hereafter referred to as the Monument in this section of the report) elk population winters in the southern Wyoming Range between Fossil Butte National Monument and Cokeville (fig. 45). During spring, they migrate north short (11 mi [18 km]) to medium (74 mi [119 km]) distances. The segment of the elk population that winters near the Monument migrates i

Date published: November 9, 2020

Migration corridors of mule deer in the Izzenhood herd, Nevada

Mule deer in the Izzenhood herd are part of a larger population known in Nevada as the “Area 6” mule deer population. They primarily reside on winter ranges in the Izzenhood Basin and upper Rock Creek drainages in western Elko County and northern Lander County. From their winter range, mule deer in this sub population migrate approximately 70 miles to summer ranges in the north

Date published: November 9, 2020

Annual Ranges of Pronghorn in the South of Interstate 40 Herd in Arizona

Interest in the movement of pronghorn south of Arizona’s Interstate 40 (I-40) began when telemetry data from 1999 – 2004 showed seasonal round-trip movements upwards of 100 miles. In 2018, high-resolution GPS location data confirmed persistence of this remarkable pronghorn migration. This herd resides primarily in Game Management Unit 8, which had a population estimate of

Date published: November 9, 2020

Migration Routes of Elk in the Piney Herd in Wyoming

Migratory movements of elk within the Piney herd unit, a large area encompassing the eastern side of the Wyoming, include short (i.e., 10 miles) to medium (i.e., 30 miles) distance migrations. These elk migrate from low elevation elk feedgrounds and native winter ranges in the Upper Green River Basin to high elevation summer ranges in the Wyoming Range. In summer, some elk head

Date published: November 9, 2020

Migration stopovers of mule deer in the Sheep Creek Range, Nevada

Mule deer in the Sheep Creek sub herd are part of the larger Area 6 herd that occupies portions of Elko, Lander, and Eureka counties. The primary winter range of this population is located along the eastern flank of the Sheep Creek Range and the west side of Boulder Valley. Most deer migrate approximately 30 miles from winter ranges in upper Boulder Creek and Antelope Creek drainages to summe...

Date published: November 9, 2020

Migration routes of mule deer in the South Tuscarora Mountains, Nevada

Mule deer in the South Tuscarora herd are part of the larger “Area 6” deer population that reside in the southern and eastern portion of this big game Management Area (MA 6). The winter range for this sub population is located along the western slopes of the Tuscarora Mountains and the Dunphy Hills. The spring migration route for this deer herd traverses north along the toe

Date published: November 9, 2020

Migration Routes of Mule Deer in the Owl Creek/Meeteetse Herd in Wyoming

Mule deer within the Owl Creek/Meeteetse herd make a number of medium- to long-distance migrations west into the Shoshone National Forest. These migrations originate on the sagebrush grasslands just southwest and west of Meeteetse, Wyoming, where this population winters. In spring, an estimated 4,100 deer leave these foothills and travel into the rugged Absaroka mountain range. These jo

Date published: November 9, 2020

Migration stopovers of mule deer in the Ruby Mountains, Nevada

The Area 10 mule deer population is one of the largest deer herds in the state, accounting for roughly 20 percent of the statewide mule deer population. The Area 10 herd is comprised of several sub populations that occupy the majority of the Ruby Mountains, are highly migratory,and exhibit long distance migrations from summer to winter ranges. Several key stopovers occur within the migratio...

Date published: November 9, 2020

Migration Routes of Mule Deer in the Mesa Population in Wyoming

The Mesa mule deer population is part of the larger Sublette herd that winters in the north-central portion of the Green River Basin, east of the Green River and west of U.S. Highway 191 (fig. 32). The Mesa wintering area supports 3,000 to 5,000 deer that migrate northwest to summer ranges in the Wyoming Range, Gros Ventre Range, and Salt River Range. The Mesa winter range, which

Date published: November 9, 2020

Migration routes of mule deer in the Sheep Creek Range, Nevada

Mule deer in the Sheep Creek sub herd are part of the larger Area 6 herd that occupies portions of Elko, Lander, and Eureka counties. The primary winter range of this population is located along the eastern flank of the Sheep Creek Range and the west side of Boulder Valley. Most deer migrate approximately 30 miles from winter ranges in upper Boulder Creek and Antelope Creek drainages to summe...

Date published: November 9, 2020

Winter ranges of mule deer in the Izzenhood herd, Nevada

Mule deer in the Izzenhood herd are part of a larger population known in Nevada as the “Area 6” mule deer population. They primarily reside on winter ranges in the Izzenhood Basin and upper Rock Creek drainages in western Elko County and northern Lander County. From their winter range, mule deer in this sub population migrate approximately 70 miles to summer ranges in the north

Date published: November 9, 2020

Migration Corridors of Mule Deer in the Paunsaugunt Plateau Herd in Utah

The Paunsaugunt Plateau in southern Utah is home to a prolific mule deer herd numbering around 5,200 individuals in 2019. In early October, these mule deer begin their migration from the Plateau traveling south distances up to 78 miles to winter range in the Buckskin Mountains near the Utah-Arizona border. Approximately 20-30% of the Paunsaugunt Plateau herd reside in northern Arizona durin...

Filter Total Items: 2,921
Publication Thumbnail
Year Published: 2020

Managing state lands for wildlife

State-owned lands are a vital component of state fish and wildlife management programs because they contain valuable habitats for a diversity of wild species and often provide important public access. The Association of Fish and Wildlife Agencies (AFWA 2017) reported state agencies manage or administer approximately 188 million hectares of land,...

Ryder, Thomas; Organ, John F.

Publication Thumbnail
Year Published: 2020

Using a bayesian multistate occupancy model to assess seabird and shorebird status in Glacier Bay, Alaska

The U.S. Department of Interior National Park Service is charged with both monitoring avian communities and evaluating the influence of visitors to National Parks on sensitive species; however, this task is challenging considering that sampling programs often involve multiple species, each with differing behavior, habitat requirements, and...

Whitlock, Steven L.; Lewis, Tania; Peterson, James

Publication Thumbnail
Year Published: 2020

Effects of climate and land-use changes on fish catches across lakes at a global scale

Globally, our knowledge on lake fisheries is still limited despite their importance to food security and livelihoods. Here we show that fish catches can respond either positively or negatively to climate and land-use changes, by analyzing time-series data (1970–2014) for 31 lakes across five continents. We find that effects of a climate or land-...

Kao, Y.; Rogers, Mark W.; Bunnell, David; Cowx, I. G.; Qian, S. S.; Anneville, O.; Beard, T. Douglas; Brinker, A.; Britton, J. R.; Chura-Crusz, R.; Gownaris, N. J.; Jackson, J. R.; Kangur, K.; Kolding, J.; Lukin, A.A.; Lynch, Abigail; Mercado-Silva, N.; Moncayo-Estrada, R.; Njaya, F. J.; Ostrovsky, I.; Rudstam, L.G.; Sandström, A. L. E.; Sato, Y.; Siguayro-Mamani, Humberto; Thorpe, A.; van Zwieten, P. A. M.; Volta, P.; Wang, Y. Q.; Weiperth, A.; Weyl, O. L. F.; Young, Joelle D.

Publication Thumbnail
Year Published: 2020

Decision implementation and the double-loop process in adaptive management of horseshoe crab harvest in Delaware Bay

No abstract available.

McGowan, Conor P.; Smith, David; Lyons, James E.

Publication Thumbnail
Year Published: 2020

Movement ecology and habitat use differences in Black Scoters wintering along the Atlantic coast

For migratory species such as Black Scoters (Melanitta americana) whose range encompasses a variety of habitats, it is especially important to obtain habitat use information across the species’ range to better understand anthropogenic threats, e.g., marine development and climate change. The objective of our study was to investigate the winter...

Plumpton, H. M.; Gilliland, S. G.; Ross, Beth

Publication Thumbnail
Year Published: 2020

FiCli, the Fish and Climate Change Database, informs climate adaptation and management for freshwater fishes

Inland fishes provide important ecosystem services to communities worldwide and are especially vulnerable to the impacts of climate change. Fish respond to climate change in diverse and nuanced ways, which creates challenges for practitioners of fish conservation, climate change adaptation, and management. Although climate change is known to...

Krabbenhoft, Trevor J. ; Myers, Bonnie Jean Evaline; Wong, Jesse; Chu, Cindy ; Tingley, Ralph W. III; Falke, Jeffrey A.; Kwak, Thomas J.; Paukert, Craig P.; Lynch, Abigail

Publication Thumbnail
Year Published: 2020

Understanding sportsperson retention and reactivation through license purchasing behavior

Most state and provincial fish and wildlife agencies have access to important information about patterns in sportsperson participation through their license databases. Using transaction data from Nebraska Game and Parks Commission's electronic hunting and fishing license system, we tracked license purchases of Nebraska, USA, resident license...

Hinrichs, M.P.; Price, N.B.; Gruntorad, M.P.; Pope, Kevin L.; Fontaine, Joseph J.; Chizinski, C.J.

Publication Thumbnail
Year Published: 2020

InFish: A professional network to promote global conservation and responsible use of inland fish

Inland fishes and fisheries make substantial contributions to individuals, society, and the environment in a changing global landscape that includes climate, water allocations, and societal changes. However, current limitations to valuing the services provided by inland fish and their fisheries often leaves them out of key decision‐making...

Lynch, Abigail J; Bartley, Devin M.; Beard, T. Douglas; Bunnell, David; Cooke, Steve J.; Cowx, Ian. G.; Funge-Smith, Simon; Paukert, Craig; Rogers, Mark W.; Taylor, William W.

Publication Thumbnail
Year Published: 2020

Using ultrasonic acoustics to detect cryptic flying squirrels: Effects of season and habitat suitability

New technologies allow for more efficient and effective monitoring of rare or elusive species. However, standardizing protocol to ensure high detection rates is important prior to widespread use of a new technique. The use of ultrasonic acoustic detectors to survey for flying squirrels (Glaucomys spp.) is a novel method that is more efficient...

Diggins, Corinne A.; Gilley, L. Michelle; Kelly, Christine A.; Ford, W. Mark

Publication Thumbnail
Year Published: 2020

Thermal diversity of salmon streams in the Matanuska-Susitna Basin, Alaska

We present the first description of summer stream thermal regimes in Alaska using metrics that represent the magnitude, variability, frequency, duration, and timing of temperature events related to salmon life histories. We used cluster analysis to characterize thermal regimes present in the Matanuska-Susitna (Mat-Su) Basin based on 10...

Shaftel, Rebecca; Mauger, Sue; Falke, Jeffrey A.; Rinella, Daniel; Davis, Jeff; Jones, Leslie

Publication Thumbnail
Year Published: 2020

Minnesota landowners’ trust in their department of natural resources, salient values similarity and wildlife value orientations

Due to extensive land conversion over the last century, much of the native prairie pothole ecosystem has been converted to agricultural or other human uses. The prairie pothole ecosystem is found in the northern plains of Iowa, Minnesota, South Dakota, North Dakota, and Montana. Because most of the land in this region is privately owned and used...

Gigliotti, Larry M.; Sweikert, Lily A.; Cornicelli, Louis; Fulton, David C.

Publication Thumbnail
Year Published: 2020

Trends in cheetah Acinonyx jubatus density in north-central Namibia

Assessing trends in abundance and density of species of conservation concern is vital to inform conservation and management strategies. The remaining population of the cheetah (Acinonyx jubatus) largely exists outside of protected areas, where they are often in conflict with humans. Despite this, the population status and dynamics of cheetah...

Fabiano, Ezequiel Chimbioputo; Sutherland, Chris; Fuller, Angela K.; Nghikembua, Matti; Eizirik, Eduardo; Marker, Laurie

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: 53
Lake Sturgeon caught on the Gasconade River, Missouri.
December 14, 2017

Lake Sturgeon caught on the Gasconade River, Missouri.

Lake Sturgeon caught on the Gasconade River, Missouri.

Assessing the effects of Stocked Rainbow Trout on Native Fishes
October 8, 2017

Assessing the effects of Stocked Rainbow Trout on Native Fishes

Rainbow trout are native only to the western United States but are stocked widely throughout the country to increase fishing opportunities for anglers. Competitive interactions have been shown to be condition specific (for example, water temperature) and, thus, may only occur seasonally or under certain environmental conditions. Understanding these differences is

...
 Assessing the spawning movement and habitat needs of riverine Neosho smallmouth bass
May 27, 2017

Assessing the spawning movement and habitat needs in Utah

Limited information is available about the movements of riverine smallmouth bass in landscapes with prevalent river-reservoir interfaces. This lack of information is especially problematic for the Neosho subspecies of smallmouth bass given the distribution covers an interwoven landscape of rivers and reservoirs. This research focuses on the movement and habitat use of the

...
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

...
Advancing Adaptive Management in the Riverside East Solar Energy Zone
March 31, 2017

Advancing Adaptive Management in the Riverside East Solar Energy Zone

The Riverside East Solar Energy Zone is a vast area in southern California designated for large-scale solar development. The Bureau of Land Management (BLM) is charged with monitoring wildlife in this area to minimize the effects of the solar production on wildlife species. However, consistent monitoring of wildlife across vast spatial landscapes over time has proven to be

...
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

...
WorldCat holdings, OCLC, USGS Pubs Warehouse, Public Domain, Biodiversity Heritage Library
December 6, 2016

A student volunteer scans historic USGS library material

Student volunteers are trained to scan historic library materials. The materials can be complex, consisting of multiple parts.

Riparian system within the rugged desert landscape.
March 15, 2016

Riparian system within the rugged desert landscape.

An example of a riparian system within the rugged desert landscape. Zone-tailed Hawks nested in the trees in the bottom of the canyon. 

  1. Raptors in the Trans Pecos, Texas Cooperative Fish and Wildlife Research Unit: State-Threatened, Riparian-Obligate Raptors in the Trans Pecos:  Desert riparian systems are distinct narrow drainages that provide environmental
...
Mule deer cross a creek in Bosque del Apache National Wildlife Refuge
February 28, 2016

Mule deer cross a creek in Bosque del Apache National Wildlife Refuge

Ungulate migrations, like the vast landscapes on which they occur, are a vital part of cultural heritage. But migration corridors are facing new and ongoing threats, and their conservation is constrained by a still-incomplete understanding of migration ecology and by misconceptions among public stakeholders.

USGS Museum, historic preservation
December 31, 2015

In the Driver’s Seat

Student dusts the Model A Ford coupe used by USGS scientists from the 1930s to 1965.