Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3707
Evolution of trophic transmission in parasites: Why add intermediate hosts? Evolution of trophic transmission in parasites: Why add intermediate hosts?
Although multihost complex life cycles (CLCs) are common in several distantly related groups of parasites, their evolution remains poorly understood. In this article, we argue that under particular circumstances, adding a second host to a single-host life cycle is likely to enhance transmission (i.e., reaching the target host). For instance, in several situations, the propagules of a...
Authors
Marc Choisy, Sam P. Brown, Kevin D. Lafferty, Frederic Thomas
Recommendations for cowbird management in recovery efforts for the southwestern willow flycatcher Recommendations for cowbird management in recovery efforts for the southwestern willow flycatcher
Three generations of mallard ducks (Anas platyrhynchos) were fed either a control diet or a diet containing 0.5 ppm mercury in the form of methylmercury. The levels of mercury in adult tissues and eggs remained about the same over 3 generations. The methylmercury diet had no effect on adult weights or weight changes during the reproductive season. Females fed a diet containing 0.5 ppm...
Authors
S.I. Rothstein, B.E. Kus, M.J. Whitfield, S.J. Sferra
Fire and invasive plants in California ecosystems Fire and invasive plants in California ecosystems
No abstract available.
Authors
Jon E. Keeley
Sonoran Desert: Fragile Land of Extremes Sonoran Desert: Fragile Land of Extremes
'Sonoran Desert: Fragile Land of Extremes' shows how biologists with the U.S. Geological Survey work with other scientists in an effort to better understand native plants and animals such as desert tortoises, saguaro cacti, and Gila monsters. Much of the program was shot in and around Saguaro National Park near Tucson, Arizona. Genetic detective work, using DNA, focuses on understanding...
Authors
Stephen Produced and Directed by Wessells
Status and distribution of the least Bell's vireo and southwestern willow flycatcher at the Cleveland National Forest in 2002 Status and distribution of the least Bell's vireo and southwestern willow flycatcher at the Cleveland National Forest in 2002
No abstract available at this time
Authors
B. Kus, D. Evans, B. Langan, M.B. Mulrooney
Rare male aggression directed toward females in a female-dominated society: Baiting behavior in the spotted hyena Rare male aggression directed toward females in a female-dominated society: Baiting behavior in the spotted hyena
Spotted hyenas (Crocuta crocuta) are gregarious carnivores. The females are socially dominant to males, and adult males rarely direct aggression toward adult females. This study analyzed all cases in which adult immigrant males behaved aggressively toward adult females in a large population of free-living hyenas in Kenya, observed for 11 years. Our goals were to describe the conditions...
Authors
Micaela Szykman, Anne L. Engh, Russell C. Van Horn, Erin E. Boydston, Kim T. Scribner, Kay E. Holekamp
How should environmental stress affect the population dynamics of disease? How should environmental stress affect the population dynamics of disease?
We modelled how stress affects the population dynamics of infectious disease. We were specifically concerned with stress that increased susceptibility of uninfected hosts when exposed to infection. If such stresses also reduced resources, fecundity and/or survivorship, there was a reduction in the host carrying capacity. This lowered the contact between infected and uninfected hosts...
Authors
Kevin D. Lafferty, Robert D. Holt
Fuel loads and fuel type mapping Fuel loads and fuel type mapping
Correct description of fuel properties is critical to improve fire danger assessment and fire behaviour modeling, since they guide both fire ignition and fire propagation. This chapter deals with properties of fuel that can be considered static in short periods of time: biomass loads, plant geometry, compactness, etc. Mapping these properties require a detail knowledge of vegetation...
Authors
Emilio Chuvieco, David Riano, Jan W. Van Wagtendonk, Felix Morsdof
Use of radio telemetry in studies of shorebirds: past contributions and future directions Use of radio telemetry in studies of shorebirds: past contributions and future directions
No abstract available.
Authors
N. Warnock, John Y. Takekawa
Tracking spring migration of northern pintails with satellite telemetry Tracking spring migration of northern pintails with satellite telemetry
No abstract available at this time
Authors
M. R. Miller, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, Michael L. Casazza, M.W. Perry
A Technique for Locating and Recovering Radiotransmitters at Close Range A Technique for Locating and Recovering Radiotransmitters at Close Range
No abstract available.
Authors
Gary M. Fellers, Patrick Kleeman
Distribution and characteristics of Southwestern Willow Flycatcher breeding sites and territories: 1993 - 2001 Distribution and characteristics of Southwestern Willow Flycatcher breeding sites and territories: 1993 - 2001
No abstract available.
Authors
Mark K. Sogge, Susan J. Sferra, Tracy McCarthey, Sartor O. Williams, Barbara E. Kus