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Unit scientists develop programs and applications to be used by State and Federal managers to conduct data analyses to inform decision making. The Colorado Unit co-authored the textbook “Bayesian Models: A Statistical Primer for Ecologists.” The Arizona Unit developed a simple, web-based tool to compare freshwater fish data collected using American Fisheries Society standard methods.

Filter Total Items: 17
Date published: January 1, 2017

Proximate Density Composition of Brown Pelican prey in the northern Gulf of Mexico (2014-2015)

The Brown Pelican (Pelecanus occidentalis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore barrier 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 individuals...

Date published: January 1, 2017

Shapefiles and Historical Aerial Photographs, Little Missouri River, 1939-2003

The data archive contains the aerial photographs and channel delineations used in our analysis. The images have been geo-referenced to the 1995 digital orthophoto quarter quadrangles as described by Miller and Friedman (2009). The separate images for each year can be viewed as a composite along with that year’s channel delineation using a geographic information system (GIS). The 2003...

Date published: January 1, 2017

Brown pelican foraging ecology in the northern Gulf of Mexico (2013-2015)_Colony reference

The Brown Pelican (Pelecanus occidentalis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore barrier 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 individuals...

Date published: January 1, 2017

Provisioning rate of Brown Pelican in the northern Gulf of Mexico (2014-2015)

The Brown Pelican (Pelecanus occidentalis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore barrier 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 individuals...

Date published: January 1, 2017

Productivity of Brown Pelican in the northern Gulf of Mexico (2014-2015)

The Brown Pelican (Pelecanus occidentalis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore barrier 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 individuals...

Filter Total Items: 2,591
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Year Published: 2019

Movement and mortality of Atlantic salmonkelts (Salmo salar) released into thePenobscot River, Maine

The Penobscot River is home to the last major run of Atlantic salmon (Salmo salar) in the United States. For over one century, the river has been stocked intensively. Since the late 1970s, most kelts are released to the Penobscot River estuary following spawning in a hatchery. Over that time, the proportion of the run made up of iteroparous...

George A. Maynard; Lisa K. Izzo; Zydlewski, Joseph D.

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Year Published: 2019

Individual behaviour and resource use of thermally stressed brook trout Salvelinus fontinalis portend the conservation potential of thermal refugia

Individual aggression and thermal refuge use were monitored in brook trout Salvelinus fontinalis in a controlled laboratory to determine how fish size and personality influence time spent in forage and thermal habitat patches during periods of thermal stress. On average, larger and more exploratory fish initiated more aggressive...

White, Shannon L.; Kline, B.C.; Hitt, Nathaniel; Wagner, Tyler

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Year Published: 2019

Applications of emerging fisheries techniques for paddlefish

No abstract available. 

Gregory Whitledge; Richard Lance; Long, James M.; Ben Neely; Jason Schooley

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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

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

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 B.

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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.

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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 C.; 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., https://doi.org/10.3133/ofr20191026.

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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.

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
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

...
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

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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

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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

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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

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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.

The USGS Oklahoma Cooperative Fish and Wildlife Research Unit teams are capturing and marking black bears
May 6, 2016

Oklahoma Cooperative Fish and Wildlife Research Unit Student with Black Bear Cub

The USGS Oklahoma Cooperative Fish and Wildlife Research Unit teams are capturing and marking black bears in the Ozark and Ouachita regions of Oklahoma.

Baby American Alligators Hatching
May 6, 2016

Baby American Allligators, Hatching

American alligator hatchlings. Courtesy USGS

The USGS provides 2-5 PhD level research scientists that sit on the graduate faculty at their host university; the host university provides office and lab space and administrative support; and the state natural resource agency(s) provide base operating funds to their unit. In addition the state and university cooperators have direct involvement in the staffing of and research conducted by the Unit

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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.