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
Factors affecting the distribution of mallards wintering in the Mississippi alluvial valley Factors affecting the distribution of mallards wintering in the Mississippi alluvial valley
The Mississippi Alluvial Valley (MAV) is the principal wintering area for Mallards (Anas platyrhynchos) in the Mississippi Flyway. Here, we consider it a distinct habitat (sensu Fretwell 1972), i.e. fitness is relatively homogeneous among ducks within the MAV but different from that of ducks in other such habitats. We analyzed recovery distributions of Mallards banded preseason (July...
Authors
James D. Nichols, Kenneth J. Reinecke, James E. Hines
Estimation methodology in contemporary small mammal capture-recapture studies Estimation methodology in contemporary small mammal capture-recapture studies
Estimators of population size and survival rate based on the Jolly-Seber capture-recapture model and the “enumeration method” are described. Enumeration estimators are shown to estimate complicated functions of capture and survival probabilities and, in the case of the population size estimator, population size. Frequently-listed reasons for preferring enumeration estimators are...
Authors
J.D. Nichols, K. H. Pollock
An eight-year demography of a Minnesota wolf pack An eight-year demography of a Minnesota wolf pack
No abstract available.
Authors
L.D. Mech, H.H. Hertel
Use of IPA to demonstrate loss of forest interior birds from isolated woodlots Use of IPA to demonstrate loss of forest interior birds from isolated woodlots
'Empleo de indices puntuales de abundancia (IPA) para demostrar la perdida de aves forestales en bosques aislados'. En Maryland, E.U., se seleccionaron bloques boscosos de diferente superficie, divididos en seis clase de tamano (2,8-6 ha, 7-14, 20-30, 34-80, 105-1300, mayores de 4000 ha). En estas ?islas' forestales fue programado un conjunto de muestreos puntuales con estas...
Authors
C.S. Robbins, D.D. Boone
Reproductive success of great black-backed and herring gulls in response to egg-oiling Reproductive success of great black-backed and herring gulls in response to egg-oiling
No abstract available.
Authors
S.J. Lewis, R.A. Malecki
Status of the red-cockaded woodpecker on Federal lands in the South Status of the red-cockaded woodpecker on Federal lands in the South
No abstract available.
Authors
M.R. Lennartz, P.H. Geissler, R.F. Harlow, R.C. Long, K.M. Chitwood, J.A. Jackson
Fifty-ninth Christmas Bird Count. 176. Ocean City, Md Fifty-ninth Christmas Bird Count. 176. Ocean City, Md
Some organophosphorus insecticides have been reported to interfere with reproduction and even cause the decline of small mammal populations. The effects of such anticholinesterases on plasma LH concentrations were examined in male mice (Peromyscus leucopus noveboracensis) intubated with water (OW) or acephate (50 and 100 mg/kg) and sacrificed after 4 h. Brain acetylcholinesterase (AChE)...
Authors
C.S. Robbins
Species decline: A perspective on extinction, recovery, and propagation Species decline: A perspective on extinction, recovery, and propagation
This keynote address was presented at the Conference on the Conservation of Endangered Species in Zoological Parks and Aquariums on April 18, 1982 at the National Aquarium in Baltimore. It outlines 1) future trends in the world's environment, resources, and population; 2) factors affecting species decline; 3) reasons for preserving life forms; and 4) techniques, with emphasis on captive
Authors
J. W. Carpenter
The smoke that settled over Palmerton The smoke that settled over Palmerton
No abstract available.
Authors
W. N. Beyer
The bile acid composition of crane gallbladder bile The bile acid composition of crane gallbladder bile
1. The biliary bile acids of the whooping crane (Grus americana) and the Florida sandhill crane (G. canadensis pratensis) have been examined. 2. Cholic acid (CA), chenodeoxycholic acid (CDOCA) and lithocholic acid were found in bile from both species of these North American cranes. 3. CDOCA and CA were the primary bile acids in both species, together constituting 70% or more of the bile...
Authors
John A. Serafin
Feeding habitats of nesting wading birds: Spatial use and social influences Feeding habitats of nesting wading birds: Spatial use and social influences
In an effort to relate social interactions to feeding-habitat use, I observed six species of wading birds near a major colony site in coastal North Carolina. Three spatial scales of habitat use were considered: the general orientation to and from the colony (coarsest level), the habitat "patch," and (at the finest level) the microhabitat. Departure-arrival directions of Great Egrets...
Authors
R. Michael Erwin
White-faced ibis (Plegadis chihi) White-faced ibis (Plegadis chihi)
No abstract available.
Authors
R.M. Erwin