Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
Survival of female mallards along the Vermont-Quebec border region Survival of female mallards along the Vermont-Quebec border region
Understanding effects of location and timing of harvest seasons on mortality of ducks and geese from hunting is important in forming regulations that sustain viable waterfowl populations throughout their range. During 1990 and 1991 we alternately marked 80 hatching year (HY), female mallards along the Vermont–Quebec border; half with radio-transmitters and bands and half with only...
Authors
Jerry R. Longcore, Daniel G. McAuley, Dennis M. Heisey, Christine M. Bunck, David A. Clugston
Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America
Wetland productivity in the Prairie Pothole Region (PPR) of North America is closely linked to climate. A warmer and drier climate, as predicted, will negatively affect the productivity of PPR wetlands and the services they provide. The effect of climate change on wetland productivity, however, will not only depend on natural processes (e.g., evapotranspiration), but also on human...
Authors
Benjamin S. Rashford, Richard M. Adams, Jun Wu, Richard A. Voldseth, Glenn R. Guntenspergen, Brett Werner, W. Carter Johnson
Density, distribution, and genetic structure of grizzly bears in the Cabinet-Yaak Ecosystem Density, distribution, and genetic structure of grizzly bears in the Cabinet-Yaak Ecosystem
The conservation status of the 2 threatened grizzly bear (Ursus arctos) populations in the Cabinet-Yaak Ecosystem (CYE) of northern Montana and Idaho had remained unchanged since designation in 1975; however, the current demographic status of these populations was uncertain. No rigorous data on population density and distribution or analysis of recent population genetic structure were...
Authors
Katherine C. Kendall, Amy C. Macleod, Kristina L. Boyd, John Boulanger, J. Andrew Royle, Wayne F. Kasworm, David Paetkau, Michael F. Proctor, Tabitha A. Graves, Kim Annis
Estimating golden-cheeked warbler immigration: Implications for the spatial scale of conservation Estimating golden-cheeked warbler immigration: Implications for the spatial scale of conservation
Understanding the factors that drive population dynamics is fundamental to species conservation and management. Since the golden-cheeked warbler Setophaga chrysoparia was first listed as endangered, much effort has taken place to monitor warbler abundance, occupancy, reproduction and survival. Yet, despite being directly related to local population dynamics, movement rates have not been...
Authors
A. Duarte, F.W. Weckerly, M. Schaub, Jeffrey S. Hatfield
Salamander chytrid fungus (Batrachochytrium salamandrivorans) in the United States—Developing research, monitoring, and management strategies Salamander chytrid fungus (Batrachochytrium salamandrivorans) in the United States—Developing research, monitoring, and management strategies
The recently (2013) identified pathogenic chytrid fungus, Batrachochytrium salamandrivorans (Bsal), poses a severe threat to the distribution and abundance of salamanders within the United States and Europe. Development of a response strategy for the potential, and likely, invasion of Bsal into the United States is crucial to protect global salamander biodiversity. A formal working group...
Authors
Evan H. Campbell Grant, Erin L. Muths, Rachel A. Katz, Stefano Canessa, M. J. Adams, Jennifer R. Ballard, Lee Berger, Cheryl J. Briggs, Jeremy T. H. Coleman, Matthew J. Gray, M. Camille Harris, Reid N. Harris, Blake R. Hossack, Kathryn P. Huyvaert, Jonathan E. Kolby, Karen R. Lips, Robert E. Lovich, Hamish I. McCallum, Joseph R. Mendelson, Priya Nanjappa, Deanna H. Olson, Jenny G. Powers, Katherine L. D. Richgels, Robin E. Russell, Benedikt R. Schmidt, Annemarieke Spitzen-van der Sluijs, Mary Kay Watry, Douglas C. Woodhams, C. LeAnn White
Use of terrestrial field studies in the derivation of bioaccumulation potential of chemicals Use of terrestrial field studies in the derivation of bioaccumulation potential of chemicals
Field-based studies are an essential component of research addressing the behavior of organic chemicals, and a unique line of evidence that can be used to assess bioaccumulation potential in chemical registration programs and aid in development of associated laboratory and modeling efforts. To aid scientific and regulatory discourse on the application of terrestrial field data in this...
Authors
Nico W. van den Brink, Jennifer A. Arblaster, Sarah R. Bowman, Jason M. Conder, John E. Elliott, Mark S. Johnson, Derek C.G. Muir, Tiago Natal-da-Luz, Barnett A. Rattner, Bradley E. Sample, Richard F. Shore
Demographic modeling for reintroduction decision-making Demographic modeling for reintroduction decision-making
In this chapter we consider the construction and use of population models to support reintroduction decision making. We begin by reviewing the decision-analytic process, also known as structured decision making. The material on structured decision making builds on the chapter by Chauvenet et al. (This Volume) who focus their attention on the objective setting step of structured decision...
Authors
Sarah J. Converse, Doug P. Armstrong
Advanced hierarchical distance sampling Advanced hierarchical distance sampling
In this chapter, we cover a number of important extensions of the basic hierarchical distance-sampling (HDS) framework from Chapter 8. First, we discuss the inclusion of “individual covariates,” such as group size, in the HDS model. This is important in many surveys where animals form natural groups that are the primary observation unit, with the size of the group expected to have some...
Authors
J. Andrew Royle
Amino acid specific stable nitrogen isotope values in avian tissues: Insights from captive American kestrels and wild herring gulls Amino acid specific stable nitrogen isotope values in avian tissues: Insights from captive American kestrels and wild herring gulls
Through laboratory and field studies, the utility of amino acid compound-specific nitrogen isotope analysis (AA-CSIA) in avian studies is investigated. Captive American kestrels (Falco sparverius) were fed an isotopically characterized diet and patterns in δ15N values of amino acids (AAs) were compared to those in their tissues (muscle and red blood cells) and food. Based upon nitrogen...
Authors
Craig E. Hebert, B.N. Popp, K.J. Fernie, C. Ka'apu-Lyons, Barnett A. Rattner, N. Wallsgrove
Modeling abundance using hierarchical distance sampling Modeling abundance using hierarchical distance sampling
In this chapter, we provide an introduction to classical distance sampling ideas for point and line transect data, and for continuous and binned distance data. We introduce the conditional and the full likelihood, and we discuss Bayesian analysis of these models in BUGS using the idea of data augmentation, which we discussed in Chapter 7. We then extend the basic ideas to the problem of
Authors
J. Andrew Royle, Marc Kery
Modeling abundance using multinomial N-mixture models Modeling abundance using multinomial N-mixture models
Multinomial N-mixture models are a generalization of the binomial N-mixture models described in Chapter 6 to allow for more complex and informative sampling protocols beyond simple counts. Many commonly used protocols such as multiple observer sampling, removal sampling, and capture-recapture produce a multivariate count frequency that has a multinomial distribution and for which...
Authors
J. Andrew Royle
Estimating abundance: Chapter 27 Estimating abundance: Chapter 27
This chapter provides a non-technical overview of ‘closed population capture–recapture’ models, a class of well-established models that are widely applied in ecology, such as removal sampling, covariate models, and distance sampling. These methods are regularly adopted for studies of reptiles, in order to estimate abundance from counts of marked individuals while accounting for imperfect...
Authors
J. Andrew Royle