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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 1,000 books authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 975
Assessing mark-recapture data with computer intensive statistics Assessing mark-recapture data with computer intensive statistics
No abstract available.
Authors
Darryl MacKenzie
Breeding population density and habitat use of Swainson's warblers in a Georgia floodplain forest Breeding population density and habitat use of Swainson's warblers in a Georgia floodplain forest
I examined density and habitat use of a Swainson's Warbler (Limnothlypis swainsonii) breeding population in Georgia. This songbird species is inadequately monitored, and may be declining due to anthropogenic alteration of floodplain forest breeding habitats. I used distance sampling methods to estimate density, finding 9.4 singing males/ha (CV = 0.298). Individuals were encountered too
Authors
E.A. Wright
Effects of herring gulls and great black-backed gulls on breeding piping plovers, South Monomoy Island, Massachusetts. Final Report Effects of herring gulls and great black-backed gulls on breeding piping plovers, South Monomoy Island, Massachusetts. Final Report
The large population of breeding herring gulls and great black-backed gulls on South Monomoy Island, Cape Cod, Massachusetts has been thought to negatively affect the breeding success of the threatened piping plover. Following the Piping Plover Recovery Plan's call for gull colonies to be removed from piping plover breeding sites, in 1996, the USFWS conducted gull removal on part of...
Authors
S. E. Keane, J.D. Fraser, P. A. Buckley
Exposure of free-flying birds to anticholinesterase insecticides in two conventionally managed fruit orchards Exposure of free-flying birds to anticholinesterase insecticides in two conventionally managed fruit orchards
Conventionally managed orchards receive extensive applications of anticholinesterase (anti-ChE) insecticides throughout the growing season. Because many avian species make use of these environments for nesting and foraging, they may receive substantial exposure to anti-ChEs. The model used to assess avian risk in these environments is highly simplified, and indicator species used in risk...
Authors
S.L. Borges
Final report: Initial ecosystem response of salt marshes to ditch plugging and pool creation: Experiments at Rachel Carson National Wildlife Refuge (Maine) Final report: Initial ecosystem response of salt marshes to ditch plugging and pool creation: Experiments at Rachel Carson National Wildlife Refuge (Maine)
This study evaluates the response of three salt marshes, associated with the Rachel Carson National Wildlife Refuge (Maine), to the practice of ditch plugging. Drainage ditches, originally dug to drain the marsh for mosquito control or to facilitate salt hay farming, are plugged with marsh peat in an effort to impound water upstream of the plug, raise water table levels in the marsh, and...
Authors
S.C. Adamowicz, C. T. Roman
Identification and synthetic modeling of factors affecting American black duck populations Identification and synthetic modeling of factors affecting American black duck populations
We reviewed the literature on factors potentially affecting the population status of American black ducks (Anas rupribes). Our review suggests that there is some support for the influence of 4 major, continental-scope factors in limiting or regulating black duck populations: 1) loss in the quantity or quality of breeding habitats; 2) loss in the quantity or quality of wintering habitats...
Authors
Michael J. Conroy, Mark W. Miller, James E. Hines
Instream flows for riverine resource stewardship Instream flows for riverine resource stewardship
No abstract available.
Authors
T. Annear, I. Chisholm, H. Beecher, A. Locke, P. Aarrestad, N. Burkardt, C. Coomer, C. Estes, J. Hunt, R. Jacobson, G. Jobsis, J. Kauffman, J. Marshall, K. Mayes, C. Stalnaker, R. Wentworth
National Fish Strain Registry - Perch and Pike (NFSR-PP) Species Tables on Reported Populations and Broodstocks National Fish Strain Registry - Perch and Pike (NFSR-PP) Species Tables on Reported Populations and Broodstocks
No abstract available at this time
Authors
H. L. Kincaid, L.J. Mengel, S. Brimm
National Fish Strain Registry - Trout Species Tables on Reported Strains and Broodstocks National Fish Strain Registry - Trout Species Tables on Reported Strains and Broodstocks
No abstract available at this time
Authors
H. L. Kincaid, L.J. Mengel, S. Brimm
Rocky Mountain futures: An ecological perspective Rocky Mountain futures: An ecological perspective
The Rocky Mountain West is largely arid and steep, with ecological scars from past human use visible for hundreds of years. Just how damaging were the past 150 years of activity? How do current rates of disturbance compare with past mining, grazing, and water diversion activities? In the face of constant change, what constitutes a "natural" ecosystem? And can a high quality of life be...
The Salton Sea: Proceedings of the Salton Sea Symposium The Salton Sea: Proceedings of the Salton Sea Symposium
No abstract available.
Authors
D. A. Barnum, J. F. Elder, D. Stevens, M. Friend