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 need for accuracy in modelling: An example The need for accuracy in modelling: An example
The need for accurate information in modelling depends on the objectives of the effort, but trustworthy data are essential for a model intended for use in the management of natural resources. This point is illustrated by referring to a recently published model of canvasback ducks. We demonstrate that several key assumptions are not supported by biological evidence, and that inferences...
Authors
Douglas H. Johnson, Michael J. Conroy, James D. Nichols
Effects on wildlife of ethyl and methyl parathion applied to California rice fields Effects on wildlife of ethyl and methyl parathion applied to California rice fields
Selected rice fields on the Sacramento National Wildlife Refuge Complex were aerially sprayed one time during May or June 1982 with either ethyl (0.11 kg Al/ha) or methyl (0.84 kg AI/ha) parathion for control of tadpole shrimp, Triops longicaudatus. No sick or dead vertebrate wildlife were found or adjacent to the treated rice fields after spraying. Specimens of the following birds and...
Authors
Thomas W. Custer, Elwood F. Hill, Harry M. Ohlendorf
[Book review] The Starling by Christopher Feare [Book review] The Starling by Christopher Feare
No abstract available.
Authors
C.S. Robbins
Optimal management strategies in variable environments: Stochastic optimal control methods Optimal management strategies in variable environments: Stochastic optimal control methods
Dynamic optimization was used to investigate the optimal defoliation of salt desert shrubs in north-western Utah. Management was formulated in the context of optimal stochastic control theory, with objective functions composed of discounted or time-averaged biomass yields. Climatic variability and community patterns of salt desert shrublands make the application of stochastic optimal...
Authors
B. Kenneth Williams
How delicate is the balance of nature? How delicate is the balance of nature?
No abstract available.
Authors
L.D. Mech
Evening roosts of the snail kite in Florida Evening roosts of the snail kite in Florida
A total of 36 roost sites of the Snail Kite (Rostrhamus sociabilis) were studied in southern Florida, of which four (11%) were used regularly for 6 or more years. Major roosts were also used as nesting sites. All roosts were in flooded marshes and 33 (91.6%) were in stands of coastal-plain willow. Population increase and the number of roosts were strongly correlated. The number of kites...
Authors
P.W. Sykes
Productivity, pesticides, and management of the Peregrine Falcon in Arizona Productivity, pesticides, and management of the Peregrine Falcon in Arizona
In the decade since research commenced with the Peregrine in Arizona, over 60 sites have been identified which historically or presently are occupied by breeding pairs. Productivity was determined for about 120 breeding attempts from 1975-85. Almost all sites, for which productivity information is available for two or more years, have hatched young. Average values for fledging success...
Authors
D. H. Ellis
The California condor: status and future prospects The California condor: status and future prospects
No abstract available.
Authors
J. M. Scott
A review of organochlorine pesticide residues in Swainson's hawk eggs A review of organochlorine pesticide residues in Swainson's hawk eggs
U. s. Fish and Wildlife Service research projects during the last 10 years in the Pacific Northwest resulted in the collecting of a sample egg from 35 Swainson's Hawk nests (Henny and Kaiser, 1979. Murrelet 60:2-5; Henny et al. 1984. Raptor Research 18:41-48). Pesticide residues, eggshell thickness, and reproductive success from these nests will be reviewed. In addition, egg residues...
Authors
Charles J. Henny