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
The use of a robust capture-recapture design in small mammal population studies: A field example with Microtus pennsylvanicus The use of a robust capture-recapture design in small mammal population studies: A field example with Microtus pennsylvanicus
The robust design of Pollock (1982) was used to estimate parameters of a Maryland M. pennsylvanicus population. Closed model tests provided strong evidence of heterogeneity of capture probability, and model M eta (Otis et al., 1978) was selected as the most appropriate model for estimating population size. The Jolly-Seber model goodness-of-fit test indicated rejection of the model for...
Authors
James D. Nichols, Kenneth H. Pollock, James E. Hines
Case report: Isolation of streptococcus zooepidemicus from a bald eagle (Haliaeetus leucocephalus) Case report: Isolation of streptococcus zooepidemicus from a bald eagle (Haliaeetus leucocephalus)
Streptococcus zooepidemicus was isolated from the interstinal tract of an adult male bald eagle (Haliaeetus leucocephalus) found dead in Minnesota in 1974.
Authors
L. N. Locke, T. G. Lamont, R. Harrington
Lead concentrations and reproduction in highway-nesting barn swallows Lead concentrations and reproduction in highway-nesting barn swallows
Swallows (Hirundo rustica) collected within the right-of-way of a major Maryland highway were greater than those found in Barn Swallows nesting within a rural area. Lead concentrations in the feathers of adults from the highway colony were also greater than Lead concentrations in the carcasses and stomach contents of adult and nestling Barn those of rural adults, but concentrations in...
Authors
C.E. Grue, T. J. O'Shea, D. J. Hoffman
Estimating prey size and number in crayfish-eating snakes, genus Regina Estimating prey size and number in crayfish-eating snakes, genus Regina
Snakes of the genus Regina feed almost exclusively on crayfish. The paired, symmetrical gastroliths of crayfish are not digested and are detectable from x-rays of the snake. Gastrolith length is directly proportional to carapace length and can be obtained from x-rays. Carapace length can be converted to kcal of ingested energy. Using these relationships and repeated captures of radio...
Authors
J.S. Godley, R.W. McDiarmid, N.N. Rojas
Species groups in Proechimys (Rodentia: Echimyidae) as indicated by karyology and bullar morphology Species groups in Proechimys (Rodentia: Echimyidae) as indicated by karyology and bullar morphology
The genus Proechimys is divisible into four groups of species on the basis of bullar septal patterns. Each of the four groups can be further characterized by distinctive distributions and karyotypes. The subgenus Trinomys and the guairae species group each are comprised of phylogenetically closely-related species. The semispinosus- and brevicauda-groups, although generally distinctive on...
Authors
A. L. Gardner, L.H. Emmons
[Part 2] A new species of Sarcoglottis (Orchidaceae) from Paraguay [Part 2] A new species of Sarcoglottis (Orchidaceae) from Paraguay
No abstract available.
Authors
P. Burns-Balogh, M.S. Foster
A little 'Faith' is followed by 'Stars' and 'Stripes' A little 'Faith' is followed by 'Stars' and 'Stripes'
No abstract available.
Authors
J. W. Carpenter, J.A. Stegeman
Testing for variation in taxonomic extinction probabilities: A suggested methodology and some results Testing for variation in taxonomic extinction probabilities: A suggested methodology and some results
Several important questions in evolutionary biology and paleobiology involve sources of variation in extinction rates. In all cases of which we are aware, extinction rates have been estimated from data in which the probability that an observation (e.g., a fossil taxon) will occur is related both to extinction rates and to what we term encounter probabilities. Any statistical method for...
Authors
M.J. Conroy, J.D. Nichols
Population trends and environmental contaminants in herons in the Tennessee Valley, 1980-81 Population trends and environmental contaminants in herons in the Tennessee Valley, 1980-81
Great Blue Heron (Ardea herodias) eggs (N = 40) collected in 1980 from four of the largest colonies in the Tennessee Valley contained organochlorine pesticide, polychlorinated biphenyl (PCB), and chromium concentrations below those associated with reduced productivity. Low concentrations of organochlorine pesticide and PCB residues also were found in eggs (N = 31) from three of the...
Authors
W. James Fleming, B.P. Pullin, D. M. Swineford
Organochlorine pesticide residues in moths from the Baltimore, MD-Washington, D.C. area Organochlorine pesticide residues in moths from the Baltimore, MD-Washington, D.C. area
Moths were collected with a light trap from 15 sites in the Baltimore, Maryland-Washington, D.C. area and analyzed for organochlorine pesticide residues. On the average, the species sampled contained 0.33 ppm heptachlor-chlordane compounds, 0.25 ppm DDE, and 0.11 ppm dieldrin. There were large differences in the concentrations detected in different species. Concentrations were especially...
Authors
W. N. Beyer, T. E. Kaiser
Taxonomic status of the frog genus Centrolenella Noble (Anura: Centrolenidae) Taxonomic status of the frog genus Centrolenella Noble (Anura: Centrolenidae)
No abstract available.
Authors
R.W. McDiarmid, J.M. Savage
Seabirds of the north and middle Atlantic coast of the United States: their status and conservation Seabirds of the north and middle Atlantic coast of the United States: their status and conservation
No abstract available.
Authors
P. A. Buckley, F. G. Buckley