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
Changing land use: Problems and opportunities Changing land use: Problems and opportunities
Under the pressure of increasing human populations and expanding demands for food and fiber, native tropical and temperate habitats are becoming more restricted, and populations of many resident and migratory birds are declining. Mist net surveys of 111 forest and agricultural sites in Mexico, Belize, and Guatemala show that some migratory species use a wide variety of habitats during...
Authors
C.S. Robbins, D.K. Dawson, B.A. Dowell
Neotropical migrant landbirds and landscape changes in Los Tuxtlas, Veracruz, Mexico Neotropical migrant landbirds and landscape changes in Los Tuxtlas, Veracruz, Mexico
Faced with the problem of habitat loss and with the need to preserve the remaining components of the original avian biodiversity in neotropical regions such as Los Tuxtlas, it is imperative to determine how the neotropical migrant bird species have responded to the anthropogenic alterations of their natural habitats. To provide data in this direction, we censused neotropical migrant...
Authors
A. Estrada, R. Coates-Estrada, E. Diaz-Islas, C.S. Robbins, B.A. Dowell, D. Meritt
Accuracy of migrant landbird habitat maps produced from LANDSAT TM data: Two case studies in southern Belize Accuracy of migrant landbird habitat maps produced from LANDSAT TM data: Two case studies in southern Belize
The study investigated the utility of Landsat TM data applied to produce geo-referenced habitat maps for two study areas (Toledo and Stann Creek). Locational and non-site-specific map accuracy was evaluated by stratified random sampling and statistical analysis of satellite classification (SCR) versus air photo interpretation results (PIR) for the overall classification and individual...
Authors
J.P. Spruce, S. Sader, C.S. Robbins, B.A. Dowell
On the use of secondary capture-recapture samples to estimate temporary emigration and breeding proportions On the use of secondary capture-recapture samples to estimate temporary emigration and breeding proportions
The use of the Cormack- Jolly-Seber model under a standard sampling scheme of one sample per time period, when the Jolly-Seber assumption that all emigration is permanent does not hold, leads to the confounding of temporary emigration probabilities with capture probabilities. This biases the estimates of capture probability when temporary emigration is a completely random process, and...
Authors
W. L. Kendall, J.D. Nichols
Patterns of prey selection by wolves in Denali National Park, Alaska Patterns of prey selection by wolves in Denali National Park, Alaska
The patterns of selection by wolves (Canis lupus) preying on moose (Alces alces), caribou (Rangifer tarandus), and Dall sheep (Ovis dalli) in Denali National Park and Preserve, Alaska were studied from 1986 through early 1992. Wolves and their prey are legally protected or relatively unharvested in most of the area, and wolf numbers doubled during the study. Based on remains of 294 moose...
Authors
L. David Mech, T.J. Meier, John W. Burch, Layne G. Adams
Sample size and allocation of effort in point count sampling of birds in bottomland hardwood forests Sample size and allocation of effort in point count sampling of birds in bottomland hardwood forests
To examine sample size requirements and optimum allocation of effort in point count sampling of bottomland hardwood forests, we computed minimum sample sizes from variation recorded during 82 point counts (May 7-May 16, 1992) from three localities containing three habitat types across three regions of the Mississippi Alluvial Valley (MAV). Also, we estimated the effect of increasing the...
Authors
W.P. Smith, D.J. Twedt, R.J. Cooper, D.A. Wiedenfeld, P.B. Hamel, R.P. Ford
Ecological and toxicological aspects of the partial meltdown of the Chernobyl nuclear power plant reactor Ecological and toxicological aspects of the partial meltdown of the Chernobyl nuclear power plant reactor
the partial meltdown of the 1000-MW reactor at Chernobyl, Ukraine, on April 26, 1986, released large amounts of radiocesium and other radionuclides into the environment, causing widespread radioactive contamination of Europe and the former Soviet Union.1-7 At least 3,000,000 trillion becquerels (TBq) were released from the fuel during the accident (Table 24.1), dwarfing, by orders of...
Authors
Ronald Eisler
A primer for wood duck nest box management A primer for wood duck nest box management
No abstract available.
Authors
G.M. Haramis
The Altay falcon: Origin, morphology and distribution The Altay falcon: Origin, morphology and distribution
The systematic position of the Altay falcon (Falco altaicus lorenzi) is perhaps the most enigmatic question lingering in falcon taxonomy. First reported to science in 1811, it has been treated as a race of the gyrfalcon (F. rusticolus), as a race of the saker (F. cherrug), as two separate species (F. lorenzi and F. altaicus), and as one to three color morphs of either the saker or the...
Authors
D. H. Ellis
What do we know about wolves and what more do we need to learn? What do we know about wolves and what more do we need to learn?
No abstract available.
Authors
L. David Mech