Publications
Browse publications authored by our scientists. Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Filter Total Items: 5125
Behavioral activities of male Cerulean Warblers in relation to habitat characteristics Behavioral activities of male Cerulean Warblers in relation to habitat characteristics
Activities of 29 male Cerulean Warblers (Setophaga cerulea) were quantified on two sites in West Virginia during May–June 2005. Singing and foraging were the most common of 11 observed behavioral activities (81.6%), while maintenance and mating behaviors were uncommonly observed. Male activity differed among vegetative strata (P = 0.02) with lower- and mid-canopy strata used most often...
Authors
Petra Bohall Wood, Kelly A. Perkins
Prevalence of Anguillicoloides crassus and growth variation in migrant yellow-phase American eels of the upper Potomac River drainage Prevalence of Anguillicoloides crassus and growth variation in migrant yellow-phase American eels of the upper Potomac River drainage
Prevalence of the non-native swim bladder nematode Anguillicoloides crassus has recently increased in American eels from estuaries of the North American Atlantic coast, but little is known about parasite prevalence or conditions of previous infection in upstream migrant eels within upper watersheds. This study is the first to confirm presence of A. crassus in the upper Potomac River...
Authors
Jennifer L. Zimmerman, Stuart A. Welsh
Highly efficient amplification of chronic wasting disease agent by protein misfolding cyclical amplification with beads (PMCAb) Highly efficient amplification of chronic wasting disease agent by protein misfolding cyclical amplification with beads (PMCAb)
Protein misfolding cyclic amplification (PMCA) has emerged as an important technique for detecting low levels of pathogenic prion protein in biological samples. The method exploits the ability of the pathogenic prion protein to convert the normal prion protein to a proteinase K-resistant conformation. Inclusion of Teflon® beads in the PMCA reaction (PMCAb) has been previously shown to...
Authors
Chad J. Johnson, Judd M. Aiken, Debbie McKenzie, Michael D. Samuel, Joel A. Pedersen
Use of occupancy models to evaluate expert knowledge-based species-habitat relationships Use of occupancy models to evaluate expert knowledge-based species-habitat relationships
Expert knowledge-based species-habitat relationships are used extensively to guide conservation planning, particularly when data are scarce. Purported relationships describe the initial state of knowledge, but are rarely tested. We assessed support in the data for suitability rankings of vegetation types based on expert knowledge for three terrestrial avian species in the South Atlantic...
Authors
Monica N. Iglecia, Jaime A. Collazo, Alexa McKerrow
Panarchy Panarchy
Panarchy is the term coined to describe hierarchical systems where control is not only top down, as typically considered, but also bottom up. A panarchy is composed of adaptive cycles, and an adaptive cycle describes the processes of development and decay in a system. Complex systems self-organize into hierarchies because this structure limits the possible spread of destructive phenomena...
Authors
Ahjond S. Garmestani, Craig R. Allen
Habitat and prey availability attributes associated with juvenile and early adult pallid sturgeon occurrence in the Missouri River, USA Habitat and prey availability attributes associated with juvenile and early adult pallid sturgeon occurrence in the Missouri River, USA
The pallid sturgeon Scaphirhynchus albus is a federally endangered species native to the Missouri and lower Mississippi Rivers, USA. As part of recovery efforts, over 360000 pallid sturgeon have been stocked into the Missouri River since 1994, and a standardized, long-term monitoring program was initiated in 2003. Understanding the distribution and habitat requirements of juvenile and...
Authors
Bryan D. Spindler, Steven R. Chipps, Robert A. Klumb, Brian D. S. Graeb, Michael C. Wimberly
Roost networks of northern myotis (Myotis septentrionalis) in a managed landscape Roost networks of northern myotis (Myotis septentrionalis) in a managed landscape
Maternity groups of many bat species conform to fission–fusion models and movements among diurnal roost trees and individual bats belonging to these groups use networks of roost trees. Forest disturbances may alter roost networks and characteristics of roost trees. Therefore, at the Fernow Experimental Forest in West Virginia, we examined roost tree networks of northern myotis (Myotis
Authors
J.B. Johnson, W. Mark Ford, J.W. Edwards
Can migration mitigate the effects of ecosystem change? Patterns of dispersal, energy acquisition and allocation in Great Lakes lake whitefish (Coregonus clupeaformis) Can migration mitigate the effects of ecosystem change? Patterns of dispersal, energy acquisition and allocation in Great Lakes lake whitefish (Coregonus clupeaformis)
Migration can be a behavioural response to poor or declining home range habitat quality and can occur when the costs of migration are overcome by the benefi ts of encountering higher-quality resources elsewhere. Despite dramatic ecosystem-level changes in the benthic food web of the Laurentian Great Lakes since the colonization of dreissenid mussels, coincident changes in condition and...
Authors
Michael D. Rennie, Mark P. Ebener, Tyler Wagner
Morphometric-based sexual determination of Bananaquits (Coereba flaveola) Morphometric-based sexual determination of Bananaquits (Coereba flaveola)
The Bananaquit (Coereba flaveola) is a common passerine throughout the tropics and has been a convenient species for ecological studies. This species has sexually monomorphic plumage and cannot be reliably sexed unless in breeding condition. This is problematic for demographic and comparative studies, which are contingent upon accurately aging and sexing individuals. Although male...
Authors
Brent D. Bibles, Clint W. Boal
Exploring similarities among many species distributions Exploring similarities among many species distributions
Collecting species presence data and then building models to predict species distribution has been long practiced in the field of ecology for the purpose of improving our understanding of species relationships with each other and with the environment. Due to limitations of computing power as well as limited means of using modeling software on HPC facilities, past species distribution...
Authors
Scott Simmerman, Jingyuan Wang, James Osborne, Kimberly Shook, Jia Hu, William Godsoe, Theodore R. Simons
Leopard density estimates at a park/farmland boundary in north-central Namibia Leopard density estimates at a park/farmland boundary in north-central Namibia
No abstract available.
Authors
A.B. Stein, Todd K. Fuller, Stephen DeStefano, L.L. Marker
Managing white-tailed deer: Eastern North America Managing white-tailed deer: Eastern North America
The ability of the white-tailed deer to adapt to and thrive in a wide variety of habitats requires different approaches to managing this species. Variation in both the population dynamics of the species and in the social and political factors that inuence how humans value white-tailed deer also necessitate different approaches. Consequently, providing an overview of the management of...
Authors
Duane R. Diefenbach, Stephen M. Shea