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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.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Single paternity of clutches in American Woodcock Single paternity of clutches in American Woodcock
Based on behavioral observations, the mating system of American Woodcock has been variously described as monogamous, a dispersed lek, or resource defense polygyny. Males perform elaborate mating displays that attract females to their display sites where copulations occur. We used microsatellite markers, developed for Ruffs (Philomachus pugnax), to assess paternity in American Woodcock...
Authors
H. Ziel, D.G. McAuley, J.M. Rhymer
Sources of variation in survival and recovery rates of American Woodcock Sources of variation in survival and recovery rates of American Woodcock
All bandings and recoveries of American woodcock (Scolopax minor) since the last similar investigation of survival and recovery rates were examined for this study. The previous parameter estimates from the Eastern Region were augmented with 4 years of bandings. Banding effort in the Central Region was sufficient to conduct analyses for the 5 years after the previous analyses. Females...
Authors
D.G. Krementz, J.G. Bruggink
Studying wildlife at local and landscape scales: Bachman's Sparrows at the Savannah River Site Studying wildlife at local and landscape scales: Bachman's Sparrows at the Savannah River Site
In the late 1980s and early 1990s, mutual research interests between land managers at the Savannah River Site and biologists at the University of Georgia resulted in a landscape-ecology study of the Bachman's Sparrow (Aimophila aestivalis). This species had been declining throughout its range for several decades and was considered a species of management concern by the U.S. Forest...
Authors
J.B. Dunning, B.J. Danielson, B.D. Watts, L. Liu, D.G. Krementz
Surface-subsurface exchange and nutrient spiraling: Chapter 6 Surface-subsurface exchange and nutrient spiraling: Chapter 6
No abstract available.
Authors
Patrick J. Mulholland, Donald L. DeAngelis
Survival of female American Woodcock breeding in Maine Survival of female American Woodcock breeding in Maine
During 1986-1989, 89 female American woodcock (Scolopax minor) included in this study were radio-marked and survival estimated for the period 1 Aprii-15 June. Eleven woodcock died: five (45%) were killed by mammals, two (18%) by unknown predators, and one (9%) by a raptor; two (18%) died from entanglement in the transmitter harness; and 1 (9%) collided with a vehicle. Survival varied...
Authors
J. R. Longcore, D.G. McAuley, G.F. Sepik, G.W. Pendleton
Tank and raceway culture Tank and raceway culture
No abstract available at this time
Authors
S.T. Summerfelt, M.B. Timmons, B.J. Watten
Temporal and geographic patterns in population trends of brown-headed cowbirds Temporal and geographic patterns in population trends of brown-headed cowbirds
The temporal and geographic patterns in the population trends of Brown-headed Cowbirds are summarized from the North American Breeding Bird Survey. During 1966-1992, the survey-wide population declined significantly, a result of declining populations in the Eastern BBS Region, southern Great Plains, and the Pacific coast states. Increasing populations were most evident in the northern...
Authors
B.G. Peterjohn, J.R. Sauer, S. Schwarz
Tephrochronology of the Brooks River Archaeological District, Katmai National Park and Preserve, Alaska: What can and cannot be done with tephra deposits Tephrochronology of the Brooks River Archaeological District, Katmai National Park and Preserve, Alaska: What can and cannot be done with tephra deposits
The Brooks River Archaeological District (BRAD) in Katmai National Park and Preserve is a classical site for the study of early humans in Alaska. Because of proximity to the active Aleutian volcanic arc, there are numerous tephra deposits in the BRAD, which are potentially useful for correlating among sites of archaeological investigations. Microprobe analyses of glass separates show...
Authors
J.R. Riehle, D.E. Dumond, C.E. Meyer, J.M. Schaaf
The bats of Wyoming The bats of Wyoming
We examined 1280 bats of 12 species submitted to the Wyoming State Veterinary Laboratory (WSVL) for rabies testing between 1981 and 1992. The most abundant species in the sample was Myotis lucifugus, followed by Eptesicus fuscus, Lasionycteris noetivagans, M. ciliolabrum, and M. volans. Using the WSVL sample and additional museum specimens, we summarized available records and knowledge...
Authors
Michael A. Bogan, Paul M. Cryan
The current status of amphibian and reptile ecotoxicological research The current status of amphibian and reptile ecotoxicological research
The extent of research conducted on the effects of contaminants on reptiles and amphibians has been scant compared to that of other vertebrate classes including fishes, birds and mammals. In a review of literature from 1972 until 1998 we found that only about 2.7% of the papers published on ecotoxicology in vertebrates concerned amphibians and 1.4% for reptiles. Most studies on amphibian
Authors
D. W. Sparling, C.A. Bishop, G. Linder