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
An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds
Regression equations that use mensural data to estimate body condition have been developed for several water birds. These equations often have been based on data that represent different sexes, age classes, or seasons, without being adequately tested for intergroup differences. We used proximate carcass analysis of 538 adult and juvenile canvasbacks (Aythya valisineria ) collected during...
Authors
D. W. Sparling, J.A. Barzen, J.R. Lovvorn, J.R. Serie
Visitor risk assessment and Lyme disease ecology in Acadia National Park Visitor risk assessment and Lyme disease ecology in Acadia National Park
No abstract available.
Authors
J. Hazen, A.F. O'Connell, E. LaCombe, P. Rand, R. Smith
Techniques for rearing and releasing nonmigratory cranes: Lessons from the Mississippi Sandhill Crane program Techniques for rearing and releasing nonmigratory cranes: Lessons from the Mississippi Sandhill Crane program
Captive-reared Mississippi sandhill cranes (Grus canadensis pulla) reared at the Patuxent Wildlife Research Center (Patuxent) have been released at the Mississippi Sandhill Crane National Wildlife Refuge (MSCNWR) since 1981. Of 131 birds released through December 1990, 103 were reared by foster parents. The remaining 28 were experimentally hand-reared in 1989 and 1990. After refining...
Authors
D. H. Ellis, Glenn H. Olsen, G.F. Gee, Jane M. Nicolich, K.E. O’Malley, Meenakshi Nagendran, Scott G. Hereford, P. Range, W.T. Harper, R.P. Ingram, D.G. Smith
Approaches to the study of the major histocompatibility complex in birds Approaches to the study of the major histocompatibility complex in birds
No abstract available.
Authors
S.I. Jarvi, R.M. Goto, G.F. Gee, W.E. Briles, M.M. Miller
Modelling population change from time series data Modelling population change from time series data
Information on change in population size over time is among the most basic inputs for population management. Unfortunately, population changes are generally difficult to identify, and once identified difficult to explain. Sources of variald (patterns) in population data include: changes in environment that affect carrying capaciyy and produce trend, autocorrelative processes, irregular
Authors
R. J. Barker, J.R. Sauer
Protocol of the third joint US-USSR Bering & Chukchi Seas expedition on the R/V Akademik Korolev Protocol of the third joint US-USSR Bering & Chukchi Seas expedition on the R/V Akademik Korolev
No abstract available.
Authors
H.J. O’Connor, A.V. Tsyban
Black duck population units as determined by patterns of band recovery Black duck population units as determined by patterns of band recovery
To estimate regional survival and band recovery rates for waterfowl populations, banding sites must be grouped for data analysis. We group American black duck banding sites using cluster analysis of pairwise comparisons of the distributions of band recoveries. We propose 6 population units, substantially fewer than the 27 black duck reference areas currently used. Flyways do not seem to...
Authors
G.W. Pendleton, J.R. Sauer
The study of relatedness and genetic diversity in cranes The study of relatedness and genetic diversity in cranes
The U.S. Fish and Wildlife Service (Service) is responsible for recovery of endangered species in the wild and, when necessary, maintenance in captivity. These programs provide an immediate measure of insurance against extinction. A prerequisite inherent in all of these programs is the preservation of enough genetic diversity to maintain a viable population and to maintain the capacity...
Authors
G.F. Gee, H.C. Dessauer, J. Longmire, W.E. Briles, R.C. Simon
A stochastic population model of mid-continental mallards A stochastic population model of mid-continental mallards
We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause...
Authors
Rolf R. Koford, J.R. Sauer, Douglas H. Johnson, J.D. Nichols, M.D. Samuel
Effects of habitat on avian productivity in abandoned pecan orchards in southern Georgia Effects of habitat on avian productivity in abandoned pecan orchards in southern Georgia
Daily survival rates (DSRs) of nests, eggs and nestlings were determined for Mourning Doves (Zenaida macroura), Northern Cardinals (Cardinalis cardinalis), Brown Thrashers (Toxostoma rufum) and Northern Mockingbirds (Mimus polyglottos) occupying abandoned pecan orchards in a highly fragmented and intensively farmed area of southern Georgia. The effects of nest placement parameters...
Authors
K.A. Patnode, Donald H. White
Energy metabolism and hematology of white-tailed deer fawns Energy metabolism and hematology of white-tailed deer fawns
Resting metabolic rates, weight gains and hematologic profiles of six newborn, captive white-tailed deer (Odocoileus virginianus) fawns (four females, two males) were determined during the first 3 mo of life. Estimated mean daily weight gain of fawns was 0.2 kg. The regression equation for metabolic rate was: Metabolic rate (kcal/kg0.75/day) = 56.1 + 1.3 (age in days), r = 0.65, P 0.001)
Authors
R.E. Rawson, G. D. DelGiudice, H.E. Dziuk, L.D. Mech
Rediscovery of the Central American Colubrid snake, Sibon argus, with comments on related species from the region Rediscovery of the Central American Colubrid snake, Sibon argus, with comments on related species from the region
Sibon argus Cope, 1875, long known only from the holotype, is redescribed based on material from Costa Rica and Panama. It differs from the only other member of the genus having an ocellate dorsal pattern (S. longifrenis) in its attenuate habitus, enlarged blunt head, protuberant eyes, and high segmental counts (ventrals 181-201, subcaudals 112-121, total segmental counts 294-312). Sibon
Authors
J.M. Savage, R.W. McDiarmid