Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16727
Managing designated campsites: Survey implications from Great Smoky Mountains National Park Managing designated campsites: Survey implications from Great Smoky Mountains National Park
No abstract available.
Authors
J. L. Marion, Y.-F. Leung
Surveys of Puerto Rican screech-owl populations in large-tract and fragmented forest habitats Surveys of Puerto Rican screech-owl populations in large-tract and fragmented forest habitats
We conducted road surveys of Puerto Rican Screech-Owls (Otus nudipes) by playing conspecific vocalizations in secondary wet forest and fragmented secondary moist forest in rural areas of eastern Puerto Rico. Six paired surveys were conducted bi-weekly beginning in April. We recorded number of owl responses, cloud cover, wind speed, moon phase, and number of passing cars during 5-min...
Authors
K.L. Pardieck, J.M. Meyers, M. Pagan
Wolf pack witness Wolf pack witness
Arctic wolves have almost never come in contact with humans because of their location in the extreme northern latitudes. Their lack of experience with human intruders makes them an easy species to study.
Authors
L.D. Mech
Prevalence and histopathology of shell disease in turtles from Lake Blackshear, Georgia Prevalence and histopathology of shell disease in turtles from Lake Blackshear, Georgia
Turtles in Lake Blackshear, Crisp County, Georgia (USA) were evaluated for shell disease during intensive trapping efforts on 8 and 9 May 1990. The disease was most prevalent in Pseudemys concinna (74%) and Trachemys scripta (35%). The degree of necrosis on the carapace was significantly positively correlated with the degree of necrosis on the plastron in T. scripta (rs = 0.50), but not...
Authors
J.E. Lovich, S.W. Gotte, C.H. Ernst, J. Harshbarger, A.F. Laemmerzahl
U. S. Geological Survey programs in Pennsylvania U. S. Geological Survey programs in Pennsylvania
The U.S. Geological Survey (USGS) is involved in mapping and studying land, mineral, biological, and water resources and determining the risk from earthquakes and other natural hazards, which are of importance to the citizens of Pennsylvania. This Fact Sheet describes how the USGS is addressing some of the major environmental issues in Pennsylvania, which include availability of mineral...
Authors
Water Resources Division U.S. Geological Survey
Systematics of wolves in eastern North America Systematics of wolves in eastern North America
Cranial morphology of Recent wolves throughout northern and western North America is remarkably consistent. Statistical analysis indicates the presence of four subspecies of gray wolf (Canis lupus) there, which are always distinguishable from the sympatric coyote (C. latrans). A fifth gray wolf subspecies, lycaon, occurs in southeastern Canada, and the red wolf (C. rufus), is found in...
Authors
R. Nowak, N.E. Federoff
Special techniques, part A: Crane artificial insemination Special techniques, part A: Crane artificial insemination
No abstract available.
Authors
G.F. Gee, C.M. Mirande
Genetic management Genetic management
No abstract available.
Authors
C.M. Mirande, G.F. Gee, S.R. Swengel, C. Sheppard
Measuring and monitoring biological diversity: Standard methods for mammals Measuring and monitoring biological diversity: Standard methods for mammals
Measuring and Monitoring Biological Diversity: Standard Methods for Mammals provides a comprehensive manual for designing and implementing inventories of mammalian biodiversity anywhere in the world and for any group, from rodents to open-country grazers. The book emphasizes formal estimation approaches, which supply data that can be compared across habitats and over time. Beginning with...
Egg and semen production Egg and semen production
No abstract available.
Authors
C.M. Mirande, G.F. Gee, A. Burke, P. Whitlock