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
Predator-prey interactions, resource depression and patch revisitation Predator-prey interactions, resource depression and patch revisitation
Generalist predators may be confronted by different types of prey in different patches: sedentary and conspicuous, cryptic (with or without refugia), conspicuous and nonsocial, or conspicuous and social. I argue that, where encounter rates with prey are of most importance, patch revisitation should be a profitable tactic where prey have short 'recovery' times (conspicuous, nonsocial prey...
Authors
R.M. Erwin
Review of dynamic optimization methods in renewable natural resource management Review of dynamic optimization methods in renewable natural resource management
In recent years, the applications of dynamic optimization procedures in natural resource management have proliferated. A systematic review of these applications is given in terms of a number of optimization methodologies and natural resource systems. Optimization methods are characterized by (1) the mathematical model used to describe a natural resource system, (2) a set of feasible...
Authors
B. Kenneth Williams
First record of the little tern, Sterna albifrons, from Hawaii First record of the little tern, Sterna albifrons, from Hawaii
No abstract available.
Authors
Roger B. Clapp
Divergent effects of postmortem ambient temperature on organophosphorus- and carbamate-inhibited brain cholinesterase activity in birds Divergent effects of postmortem ambient temperature on organophosphorus- and carbamate-inhibited brain cholinesterase activity in birds
Time- and temperature-dependent postmortem changes in inhibited brain cholinesterase (ChE) activity may confound diagnosis of field poisoning of wildlife by anticholinesterase pesticide. Carbamate-inhibited ChE activity may return to normal within 1 to 2 days of exposure of intact carcass to moderate ambient temperature (18-32C). Organophosphorus-inhibited ChE activity becomes more...
Authors
E. F. Hill
Selenium and small mammal populations at Kesterson reservoir Selenium and small mammal populations at Kesterson reservoir
No abstract available.
Authors
D. R. Clark
Bioaccumulation and effects of selenium in wildlife Bioaccumulation and effects of selenium in wildlife
No abstract available.
Authors
H. M. Ohlendorf
Aspects of the reproductive ecology and behavior of the tepui toads, genus Oreophrynella (Anura: Bufonidae) Aspects of the reproductive ecology and behavior of the tepui toads, genus Oreophrynella (Anura: Bufonidae)
We report direct development for toads of the bufonid genus Oreophrynella, endemic to the tepuis of the Guayanan Highlands. Tepui toads place few (9-13), large (-3 mm diameter) eggs in a single or communal terrestrial nest. One communal nest found on Kukenan-tepui contained 102 toads (70 males, 30 females, 2 hatchlings) and 321 eggs in clumps of 8-35. All viable clutches from Kukenan...
Authors
R.W. McDiarmid, S. Gorzula
The relationship between body mass and annual survival in American Black Ducks The relationship between body mass and annual survival in American Black Ducks
No abstract available.
Authors
D.G. Krementz, J.E. Hines, P.O. Corr, Ray B. Owen
An improved method to monitor nest attentiveness using radio-telemetry An improved method to monitor nest attentiveness using radio-telemetry
An improved method of automatically monitoring nest attentiveness was designed and tested using radio-equipped American Woodcock (Scolopax minor). Shielded coaxial cable (RG-58) was extended from a receiver and placed 30 cm above the nest, with a 3.8 cm section of the inner wire exposed. Presence, absence, and activity of birds within 10.1 ? 5.2 m (SD) of the nest were clearly indicated...
Authors
D.S. Licht, D.G. McAuley, J. R. Longcore, G.F. Sepik
Model-based estimates of annual survival rate are preferable to observed maximum lifespan statistics for use in comparative life-history studies Model-based estimates of annual survival rate are preferable to observed maximum lifespan statistics for use in comparative life-history studies
Estimates of longevity are available for many animals, and are commonly used in comparative life-history analyses. We suggest that annual survival rate is a more appropriate life history parameter for most comparative life history analyses. Observed maximum lifespans estimate complicated functions of survival and sampling probabilities. Annual survival rate estimates derived from modern...
Authors
D.G. Krementz, J.R. Sauer, J.D. Nichols
Trapping Boiga irregularis on Guam using bird odors Trapping Boiga irregularis on Guam using bird odors
No abstract available.
Authors
T. H. Fritts, N.J. Scott, B.E. Smith