Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16909
The disappearance of Guam's wildlife: New insights for herpetology, evolutionary ecology, and conservation The disappearance of Guam's wildlife: New insights for herpetology, evolutionary ecology, and conservation
The wealth of data generated from intensive study of the brown tree snake as a result of the need to control introduced populations of this pest species allow several important conclusions. First, that the snakes on Guam are extraordinary in terms of their absolute abundance and in terms of their ability to exploit a broad prey base. Our data suggest an exceptionally high reproductive...
Authors
G.H. Rodda, T. H. Fritts, D. Chiszar
Capture-recapture survival models taking account of transients Capture-recapture survival models taking account of transients
The presence of transient animals, common enough in natural populations, invalidates the estimation of survival by traditional capture- recapture (CR) models designed for the study of residents only. Also, the study of transit is interesting in itself. We thus develop here a class of CR models to describe the presence of transients. In order to assess the merits of this approach we...
Authors
R. Pradel, J.E. Hines, J.D. Lebreton, J.D. Nichols
Dramatic fluctuations in liver mass and metal content of eared grebes (Podiceps nigricollis) during autumnal migration Dramatic fluctuations in liver mass and metal content of eared grebes (Podiceps nigricollis) during autumnal migration
Adult eared grebes exhibit threefold fluctuation in body mass and up to a fivefold variation in liver weight during the course of their annual breeding and migratory cycle. Concentrations of 20 metals or metalloids were quantified in the liver from eared grebes obtained at three phases of their annual cycle: newly arrived migrants (July-August-September), staging (October-November), and...
Authors
Barnett A. Rattner, J.R. Jehl
Spatial distribution of larval Ixodes scapularis (Acari:Ixodidae) on Peromyscus leucopus and Microtus pennsylvanicus at two island sites Spatial distribution of larval Ixodes scapularis (Acari:Ixodidae) on Peromyscus leucopus and Microtus pennsylvanicus at two island sites
Larval blacklegged ticks, Ixodes scapularis, were collected from white-footed mice, Peromyscus leucopus, on Prudence Island (where Microtus pennsylavanicus were not captured) and from meadow voles, M. pennsylvanicus, on Patience Island (where P. leucopus was absent) in Narragansett Bay, Rhode Island from June to October 1992. Ixodes scapularis larvae were also collected by flagging in...
Authors
D. Markowski, K.E. Hyland, H. S. Ginsberg, Renjie Hu
Efficacy of eastern encephalitis immunization in whooping cranes Efficacy of eastern encephalitis immunization in whooping cranes
An epizootic of eastern equine encephalitis (EEE) at the Patuxent Wildlife Research Center (PWRC), Laurel, Maryland (USA), in 1989 provided an opportunity to determine if EEE immunization protected whooping cranes (Grus americana). Based on seroconversion of 31% of sympatric hatch-year sandhill cranes, Grus canadensis, and a previous 35% case fatality rate in whooping cranes, 17 (37%) of...
Authors
Glenn H. Olsen, M.J. Turell, B.B. Pagac
Watershield use by ring-necked ducks Watershield use by ring-necked ducks
During 1993-94 and 1994-95, the amount of watershield (Brasenia schreberi) in selected Maryland wetlands was determined to see if a relationship existed between the amount of watershield on a wetland and the number of ring-necked ducks (Aythya collaris) observed on that wetland. Data were collected for two years from eight different wetlands on the Patuxent Research Refuge in Laurel...
Authors
J.A. Olsen, Matthew C. Perry
Migration chronology and distribution of redheads on the lower Laguna Madre, Texas Migration chronology and distribution of redheads on the lower Laguna Madre, Texas
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of southern Texas and Mexico. Because there have been profound changes in the Laguna Madre over the past three decades and the area is facing increasing industrial and recreational development, we studied the winter distribution and habitat requirements of redheads during two winters (1987-1988 and 1988-1989) on...
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank
A review of factors potentially limiting the growth of American black duck populations A review of factors potentially limiting the growth of American black duck populations
No abstract available.
Authors
M.J. Conroy, D.G. Krementz
An analysis of band recovery distributions from spring and pre-season banding of American Black Ducks An analysis of band recovery distributions from spring and pre-season banding of American Black Ducks
No abstract available.
Authors
S.T. Kelly, J.R. Sauer, Diane S. Chu, G.W. Pendleton
Amphibians and reptiles of the upper Rio Comainas, Cordillera del Condor Amphibians and reptiles of the upper Rio Comainas, Cordillera del Condor
No abstract available.
Authors
R.P. Reynolds, J. Icochea
A spatially-explicit modelling environment for evaluating deer management strategies A spatially-explicit modelling environment for evaluating deer management strategies
No abstract available.
Authors
K.L. Risenhoover, H.B. Underwood, W. Yan, J.L. Cooke
Effects of flooding croplands in winter on water quality in the Mississippi delta Effects of flooding croplands in winter on water quality in the Mississippi delta
No abstract available.
Authors
S.W. Manley, R.M. Kaminski, S.H. Schoenholtz, P. Rodrigue, K. J. Reinecke