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
Multispecies modeling for adaptive management of horseshoe crabs and red knots in the Delaware Bay Multispecies modeling for adaptive management of horseshoe crabs and red knots in the Delaware Bay
Adaptive management requires that predictive models be explicit and transparent to improve decisions by comparing management actions, directing further research and monitoring, and facilitating learning. The rufa subspecies of red knots (Calidris canutus rufa), which has recently exhibited steep population declines, relies on horseshoe crab (Limulus polyphemus) eggs as their primary food...
Authors
Conor P. McGowan, David R. Smith, J. A. Sweka, Julien Martin, James D. Nichols, R. Wong, J. E. Lyons, L. J. Niles, K. Kalasz, J. Brust, M. Klopfer, B. Spear
A 4-year study of invasive and native spider populations in Maine A 4-year study of invasive and native spider populations in Maine
Invasive spiders pose potential threats to native spiders. In 2002, the European spider Linyphia triangularis (Clerck, 1757) (Araneae: Linyphiidae) was discovered in all but one county in Maine. At Acadia National Park, we conducted a 4-year study of L. triangularis and three native linyphiid species of a similar size (Frontinella communis (Hentz, 1850), Pityohyphantes subarcticus...
Authors
Elizabeth M. Jakob, Adam H. Porter, Howard Ginsberg, Julie V. Bednarski, Jeremy Houser
How restructuring river connectivity changes freshwater fish biodiversity and biogeography How restructuring river connectivity changes freshwater fish biodiversity and biogeography
Interbasin water transfer projects, in which river connectivity is restructured via man-made canals, are an increasingly popular solution to address the spatial mismatch between supply and demand of fresh water. However, the ecological consequences of such restructuring remain largely unexplored, and there are no general theoretical guidelines from which to derive these expectations...
Authors
Heather L. Lynch, Evan H. Campbell Grant, Rachata Muneepeerakul, Muthukumarasamy Arunachalam, Ignacio Rodriguez-Iturbe, William F. Fagan
Heightened exposure to parasites favors the evolution of immunity in brood parasitic cowbirds Heightened exposure to parasites favors the evolution of immunity in brood parasitic cowbirds
Immunologists and evolutionary biologists are interested in how the immune system evolves to fit an ecological niche. We studied the relationship between exposure to parasites and strength of immunity by investigating the response of two species of New World cowbirds (genus Molothrus, Icteridae), obligate brood parasites with contrasting life history strategies, to experimental arboviral...
Authors
Caldwell Hahn, William K. Reisen
Assessing hypotheses about nesting site occupancy dynamics Assessing hypotheses about nesting site occupancy dynamics
Hypotheses about habitat selection developed in the evolutionary ecology framework assume that individuals, under some conditions, select breeding habitat based on expected fitness in different habitat. The relationship between habitat quality and fitness may be reflected by breeding success of individuals, which may in turn be used to assess habitat quality. Habitat quality may also be...
Authors
Florent Bled, J. Andrew Royle, Emmanuelle Cam
An adaptive-management framework for optimal control of hiking near golden eagle nests in Denali National Park An adaptive-management framework for optimal control of hiking near golden eagle nests in Denali National Park
Unintended effects of recreational activities in protected areas are of growing concern. We used an adaptive-management framework to develop guidelines for optimally managing hiking activities to maintain desired levels of territory occupancy and reproductive success of Golden Eagles (Aquila chrysaetos) in Denali National Park (Alaska, U.S.A.). The management decision was to restrict...
Authors
Julien Martin, Paul L. Fackler, James D. Nichols, Michael C. Runge, Carol L. McIntyre, Bruce L. Lubow, Maggie C. McCluskie, Joel A. Schmutz
Global biodiversity: Indicators of recent declines Global biodiversity: Indicators of recent declines
In 2002, world leaders committed, through the Convention on Biological Diversity, to achieve a significant reduction in the rate of biodiversity loss by 2010. We compiled 31 indicators to report on progress toward this target. Most indicators of the state of biodiversity (covering species’ population trends, extinction risk, habitat extent and condition, and community composition) showed...
Authors
Stuart H.M. Butchart, Matt Walpole, Ben Collen, Arco Van Strien, Jorn P.W. Scharlemann, Rosamunde Almond, Jonathan E.M. Baillie, Bastian Bomhard, Claire Brown, John Bruno, Kent E. Carpenter, Genevieve M. Carr, Janice Chanson, Anna M. Chenery, Jorge Csirke, Nick C. Davidson, Frank Dentener, Matt Foster, Alessandro Galli, James N. Galloway, Piero Genovesi, Richard D. Gregory, Marc Hockings, Valerie Kapos, Jean-Francois Lamarque, Fiona Leverington, Jonathan Loh, Melodie A. McGeoch, Louise McRae, Anahit Minasyan, Monica Hernandez Morcillo, Thomasina E.E. Oldfield, Daniel Pauly, Suhel Quader, Carmen Revenga, John R. Sauer, Benjamin Skolnik, Dian Spear, Damon Stanwell-Smith, Simon N. Stuart, Andy Symes, Megan Tierney, Tristan D. Tyrrell, Jean-Christophe Vie, Reg Watson
Density estimation in a wolverine population using spatial capture-recapture models Density estimation in a wolverine population using spatial capture-recapture models
Classical closed-population capture-recapture models do not accommodate the spatial information inherent in encounter history data obtained from camera-trapping studies. As a result, individual heterogeneity in encounter probability is induced, and it is not possible to estimate density objectively because trap arrays do not have a well-defined sample area. We applied newly-developed...
Authors
J. Andrew Royle, Audrey J. Magoun, Beth Gardner, Patrick Valkenbury, Richard E. Lowell
A beaded collar for dual micro GPS/VHF transmitter attachment to nutria A beaded collar for dual micro GPS/VHF transmitter attachment to nutria
We report on the development of an approximately 85-g beaded collar for dual micro GPS/VHF transmitter attachment to semi-aquatic nutria (Myocastor coypus). Prototype collars were tested on captive nutria and refined during field trials. Central to the design was novel use of the VHF transmitter antenna as a collar. A circular collar was formed by passing the 44-cm antenna cable through...
Authors
G. Michael Haramis, T. S. White
Acute toxicity, histopathology, and coagulopathy in American kestrels (Falco sparverius) following administration of the rodenticie diphacinone Acute toxicity, histopathology, and coagulopathy in American kestrels (Falco sparverius) following administration of the rodenticie diphacinone
The acute oral toxicity of the anticoagulant rodenticide diphacinone was found to be over 20 times greater in American kestrels (Falco sparverius; median lethal dose 96.8 mg/kg body weight) compared with Northern bobwhite (Colinus virginianus) and mallards (Anas platyrhynchos). Modest evidence of internal bleeding was observed at necropsy, although histological examination of heart...
Authors
Barnett A. Rattner, Katherine E. Horak, Sarah E. Warner, Daniel D. Day, Carol U. Meteyer, Steven F. Voler, John D. Eisemann, John J. Johnston
Counting India's wild tigers reliably Counting India's wild tigers reliably
No abstract available.
Authors
K. Ullas Karanth, Arjun M. Gopalaswamy, N. Samba Kumar, Mohan Delampady, James D. Nichols, John Seidensticker, Barry R. Noon, Stuart L. Pimm
Common Grackle breeding on bottomland forest restoration sites Common Grackle breeding on bottomland forest restoration sites
Two of 36 forest restoration sites in the Mississippi Alluvial Valley surveyed from 2000-2002 harbored Quiscalus quiscula (Common Grackle). Occupied sites were in less-forested landscapes and had sparser understory vegetation due to flooding. Probability of daily nest survival (0.9077) of 169 Common Grackle nests was influenced by nest-placement, temporal, and landscape effects. Age of...
Authors
Daniel J. Twedt