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
Environmental contaminants in bald eagle eggs—1980–84—and further interpretations of relationships to productivity and shell thickness Environmental contaminants in bald eagle eggs—1980–84—and further interpretations of relationships to productivity and shell thickness
Bald eagle (Haliaeetus leucocephalus) eggs were collected in 15 States in the United States in 1980–1984 and analyzed for organochlorine pesticides, polychlorinated biphenyls (PCBs), and mercury. Data were compared and combined with data from earlier studies to examine trends and refine relationships of contaminants to shell thickness and young production. Moderate shell thinning...
Authors
Stanley N. Wiemeyer, Christine M. Bunck, Charles J. Stafford
Environmental contaminants in canvasbacks wintering on San Francisco Bay, California Environmental contaminants in canvasbacks wintering on San Francisco Bay, California
The concentrations of 11 trace elements, 21 organochlorines, 13 polycyclic aromatic hydrocarbons, and 13 aliphatic hydrocarbons were determined in canvasbacks (Aythya valisineria) wintering on San Francisco Bay, California during 1988. With the exception of Se, concentrations of potentially toxic elements were low. Similarly, concentrations of most organic compounds were near or below...
Authors
A.K. Miles, H. M. Ohlendorf
The brown tree snake on Pacific islands: 1993 status The brown tree snake on Pacific islands: 1993 status
No abstract available.
Authors
G.H. Rodda, T. H. Fritts
Canine parvovirus effect on wolf population change and pup survival Canine parvovirus effect on wolf population change and pup survival
Canine parvovirus infected wild canids more than a decade ago, but no population effect has been documented. In wild Minnesota wolves (Canis lupus) over a 12-yr period, the annual percent population increase and proportion of pups each were inversely related to the percentage of wolves serologically positive to the disease. Although these effects did not seem to retard this large extant...
Authors
L.D. Mech, S.M. Goyal
Social foraging classes in raptorial birds Social foraging classes in raptorial birds
No abstract available.
Authors
D. H. Ellis, J.C. Bednarz, D.G. Smith, S.P. Flemming
Effects of habitat availability on dispersion of a stream cyprinid Effects of habitat availability on dispersion of a stream cyprinid
We analyzed temporal changes in the dispersion of the rosyside dace,Clinostomus funduloides, (family Cyprinidae) in a headwater stream, to assess the role of habitat availability in promoting fish aggregation. The dace foraged alone and in groups of up to about 25 individuals, and dispersion varied significantly among monthly censuses conducted from May through December. In two of three...
Authors
Mary C. Freeman, Gary D. Grossman
Resource protection for waterbirds in Chesapeake Bay Resource protection for waterbirds in Chesapeake Bay
Many living resources in the Chesapeake Bay estuary have deteriorated over the past 50 years. As a result, many governmental committees, task forces, and management plans have been established. Most of the recommendations for implementing a bay cleanup focus on reducing sediments and nutrient flow into the watershed. We emphasize that habitat requirements other than water quality are...
Authors
R.M. Erwin, G.M. Haramis, D.G. Krementz, S.L. Funderburk
Overwinter survival of mallards fed selenium Overwinter survival of mallards fed selenium
Adult male mallards (Anas platyrhynchos) were fed diets supplemented with 0, 10, 20, 40, or 80 μg/g selenium in the form of selenomethionine. Mortality in each of these treatments was 0, 0, 25, 95, and 100%, respectively, during a 16-week exposure that started in November. After one week of treatment, body weights were significantly depressed by the 20, 40, and 80-μg/g selenium...
Authors
Gary Heinz, M. A. Fitzgerald
Preliminary report of extensive gyrfalcon and snowy owl mortality in northern Siberia Preliminary report of extensive gyrfalcon and snowy owl mortality in northern Siberia
No abstract available.
Authors
D. H. Ellis, D.G. Smith
Optimal allocation of point-count sampling effort Optimal allocation of point-count sampling effort
Both unlimited and fixed-radius point counts only provide indices to population size. Because longer count durations lead to counting a higher proportion of individuals at the point, proper design of these surveys must incorporate both count duration and sampling characteristics of population size. Using information about the relationship between proportion of individuals detected at a...
Authors
Richard J. Barker, John R. Sauer, William A. Link