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
Approaches for the direct estimation of rate of increase in population size using capture-recapture data Approaches for the direct estimation of rate of increase in population size using capture-recapture data
Recent developments in the modeling of capture-recapture data permit the direct estimation and modeling of population growth rate Pradel (1996). Resulting estimates reflect changes in numbers of birds on study areas, and such changes result from movement as well as survival and reproductive recruitment. One measure of the 'importance' of a demographic vital rate to population growth is...
Authors
J.D. Nichols, T. Scott Sillett, J.E. Hines, Richard T. Holmes
Dendrobates auratus Girard, 1855: green and black dart-poison frog Dendrobates auratus Girard, 1855: green and black dart-poison frog
No abstract available.
Authors
M.J. Lannoo, P. Nanjappa
The effect of varying protein levels on blood chemistry, food consumption, and behavior of captive seaducks The effect of varying protein levels on blood chemistry, food consumption, and behavior of captive seaducks
The Chesapeake Bay is a primary wintering area for scoters and the long-tailed ducks (Clangia hyemalis) that migrate along the Atlantic Flyway. Recently, the Chesapeake Bay had undergone an ecosystem shift and little is known about how this is affecting the seaduck populations. We are determining what are the preferred food sources of the seaducks wintering on the Bay and analyzing the...
Authors
A. M. Wells-Berlin, Matthew C. Perry, Glenn H. Olsen
Biological objectives for bird populations Biological objectives for bird populations
No abstract available.
Authors
J. Bart, M. Koneff, S. Wendt
Water level dynamics in wetlands and nesting success of Black Terns in Maine Water level dynamics in wetlands and nesting success of Black Terns in Maine
The Black Tern (Chlidonias niger) nests in freshwater wetlands that are prone to water level fluctuations, and nest losses to flooding are common. We examined temporal patterns in water levels at six sites with Black Tern colonies in Maine and determined probabilities of flood events and associated nest loss at Douglas Pond, the location of the largest breeding colony. Daily...
Authors
Andrew T. Gilbert, F. A. Servello
Bufo alvarius Girard, 1859: Colorado River toad Bufo alvarius Girard, 1859: Colorado River toad
No abstract available.
Authors
M.J. Fouquette, C.W. Painter, P. Nanjappa
White-tailed deer ecology and management on Fire Island White-tailed deer ecology and management on Fire Island
Deer populations have grown dramatically on Fire Island National Seashore (FIlS) since 1983. Trend data reveal a dichotomy in deer dynamics. In the eastern half of the island, deer density appears to have stabilized between 25-35 deer/km2. In the western half of the island, deer densities are 3-4 times as high in residential communities. Concomitant with that increase has been a general...
Authors
H.B. Underwood
Modern open-population capture-recapture models Modern open-population capture-recapture models
No abstract available.
Authors
J.D. Nichols
Size evolution in Goodwin’s small-eared shrew, Cryptotis goodwini Size evolution in Goodwin’s small-eared shrew, Cryptotis goodwini
Fossils of Cryptotis goodwini from Honduras indicate that body sizes of modern individuals average at least 18% larger than among members of the late Pleistocene population of this species. Palynological and other paleoenvironmental studies provide evidence that the Neotropical montane environments that these shrews inhabit were cooler and drier in the late Pleistocene than at present...
Authors
N. Woodman
Atlantic Flyway review: Region IV, Piedmont-Coastal Plain, Fall 2004 Atlantic Flyway review: Region IV, Piedmont-Coastal Plain, Fall 2004
July, August, and September were cool and wet in the Southeast, with multiple hurricanes threatening the banding stations. Banding results ranged from poor in Laurel and Chincoteague to excellent at Chino Farms, Kiptopeke, Jekyll Island, and the Florida stations. There was little agreement on peak migration days, which ranged from 11 Oct to 6 Nov. Likewise, the date for maximum species...
Authors
Chandler S. Robbins
Correlates of vernal pool occurrence in the Massachusetts USA, landscape Correlates of vernal pool occurrence in the Massachusetts USA, landscape
Vernal pool wetlands are at risk of destruction across the northeast United States, due in part to their diminutive size and short hydroperiolds. These characteristics make it difficult to locate vernal pool habitats in the landscape during much of the year, and no efficient method exists for predicting their occurrence. A logistic regression procedure was used to identify large-scale...
Authors
Evan H. Campbell Grant