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Year Published: 2019

Relatedness within and among Myotis septentrionalis colonies at a local scale

Abstract: We assessed parentage within and among maternity colonies of the northern long-eared bat (Myotis septentrionalis Troessart 1897) in north-central Kentucky from 2011–2013 to better understand colony social structure, formation, and membership dynamics. We intensively sampled colonies in close and remote (> 10 km) spatial proximity...

Ford, W. Mark; Miluska Olivera-Hyde; Alexander Silvis; Eric M. Hallerman; Eric R. Britzke

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Year Published: 2019

A hierarchical Bayesian approach for handling missing classification data

Ecologists use classifications of individuals in categories to understand composition of populations and communities. These categories might be defined by demographics, functional traits, or species. Assignment of categories is often imperfect, but frequently treated as observations without error. When individuals are observed but not classified,...

Alison C. Ketz; Therese L. Johnson; Hooten, Mevin B.; N. Thompson Hobbs

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Year Published: 2019

Cooperative Fish and Wildlife Research Units program—2018 year in review

The Cooperative Fish and Wildlife Research Units (CRU) program had an interesting and challenging year in 2018. We made significant strategic advances on many fronts and had setbacks in others.Our relationship with the U.S. Fish and Wildlife Service, the agency we belonged to from 1935 to the mid-1990s, was further reinforced through strategic...

Organ, John F.; Thompson, John D.; Childs, Dawn E.; Dennerline, Donald E.
Organ, J.F., Thompson, J.D., Childs, D.E., and Dennerline, D.E., 2019, Cooperative Fish and Wildlife Research Units program—2018 year in review (ver. 1.1, March 29, 2019): U.S. Geological Survey Circular 1452, 52 p., https://doi.org/10.3133/cir1452.

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Year Published: 2019

Cooperative Fish and Wildlife Research Units program—2018 year in review postcard

This postcard provides details about the "Cooperative Fish and Wildlife Research Units Program—2018 Year in Review," U.S. Geological Survey Circular 1452, now available at https://doi.org/10.3133/cir1452. In this report, you will find details about the Cooperative Fish and Wildlife Research Units (CRU) program relating to its background, fish and...

Organ, John F.; Thompson, John D.; Childs, Dawn; Dennerline, Donald E.
Organ, J.F., Thompson, J.D., Childs, D.E., and Dennerline, D.E., 2019, Cooperative Fish and Wildlife Research Units program—2018 year in review postcard: U.S. Geological Survey General Information Product 187, 2 p., https://doi.org/10.3133/gip187.

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Year Published: 2019

Fish growth changes over time in a Midwestern U.S. lake

Growth of Walleyes Sander vitreus, Yellow Bass Morone mississippiensis, Common Carp Cyprinus carpio, and Black Bullheads Ameiurus melas was assessed in Clear Lake, Iowa, over several decades and in relation to environmental variables. Growth of Common Carp was positively correlated with phytoplankton concentration. Recent Black Bullhead growth was...

Pierce, Clay

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Year Published: 2019

Role of recovering river herring population on smallmouth bass diet and growth

Fish assemblages in Atlantic coastal rivers have undergone extensive ecological change in the last two and a half centuries due to human influence, including extirpation of many migratory fish species, such as river herring (Alosa spp.) and introduction of nonnative piscivores, notably Smallmouth Bass Micropterus dolomieu. Recently, dam removals...

Watson, Jonathan M.; Coghlan, Stephen M.; Zydlewski, Joseph D.; Hayes, Daniel B.; Stich, Daniel S.

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Year Published: 2019

Life history of the endemic saddleback crayfish, Faxonius medius (Faxon, 1884), (Decapoda: Cambaridae) in Missouri, USA

The saddleback crayfish, Faxonius medius (Faxon, 1884), is endemic to a single drainage in eastern Missouri, USA, that is affected by heavy metals mining, and adjacent to a rapidly-expanding urban area. We studied populations of F. medius in two small streams for 18 months to describe the annual reproductive cycle and gather information about...

DiStefano, R.J.; Westhoff, J.T.; Rice, C.J.; Rosenberger, Amanda E.

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Year Published: 2019

Understanding conservation decisions of agriculture producers

Most land in the United States (US) is privately owned and used for agriculture. To address the effect of agriculture on wildlife, conservation professionals and organizations need to understand the land use decisions made by farmers and ranchers. We developed a tool for categorizing farmers and ranchers by their conservation land use values (LUVs...

Gigliotti, Larry M.; Lily A. Sweikert

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Year Published: 2019

Flow-ecology relationships are spatially structured and differ among flow regimes

In streams, hydrology is a predominant driver of ecological structure and function. Providing adequate flows to support aquatic life, or environmental flows, is therefore a top management priority in stream systems. Flow regime classification is a widely accepted approach for establishing environmental flow guidelines. However, it is surprisingly...

Magoulick, Daniel D.

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Year Published: 2019

Evaluating the role of Farm Bill conservation program participation in conserving America’s grasslands

Grasslands are one of the most imperiled ecosystems in the world and the majority of the grassland ecosystem in the United States is privately owned and used for agriculture. Conversion of grasslands to row crops is expanding, fueled by commodity price increases, technological improvements, and agricultural policy. The U.S. government primarily...

Gigliotti, Larry M.; Lily A. Sweikert

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Year Published: 2019

Pitfall traps: A review of methods for estimating arthropod abundance

Pitfall traps are commonly used in diet studies for insectivorous and omnivorous wildlife. Pitfall trap methodologies and designs vary tremendously among studies and investigators, and this variation and lack of standardization limits scientists’ abilities to compare their results to others. We conducted a literature review to identify the most...

Conway, Courtney J.; Hohbein, Rhianna

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Year Published: 2019

Public acceptability of development in the Northern Forest of Vermont, USA – the influence of wildlife information, recreation involvement, and demographic characteristics

Increasing development such as roads and houses will alter future landscapes and result in biological, social, and economic trade-offs. Managing development requires information on the public’s acceptability of development and understanding which factors shape acceptability. In this study, we examined three questions: 1) What is the public’s...

Jessica Espenshade; James Murdoch; Donovan, Therese M.; Robert Manning; Charles Bettigale; John Austin

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
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. 

Smithsonian’s Natural History Museum
December 31, 2015

USGS Volunteer Student at the Smithsonian Natural History Museum

The Smithsonian Natural History Museum offers hands-on learning experiences.

Pallid sturgeon
December 31, 2015

Pallid Sturgeon

The pallid sturgeon is an endangered riverine sturgeon with historical distribution restricted to parts of the Yellowstone, Missouri, Mississippi, and Atchafalaya Rivers. Although rare, pallid sturgeon in the lower Mississippi River appear to be naturally recruiting, and information about habitat use is important to conserve this species. This study seeks to provide

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