Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16746
Identifying and assessing ecotourism visitor impacts at selected protected areas in Costa Rica and Belize Identifying and assessing ecotourism visitor impacts at selected protected areas in Costa Rica and Belize
Protected area visitation is an important component of ecotourism, and as such, must be sustainable. However, protected area visitation may degrade natural resources, particularly in areas of concentrated visitor activities like trails and recreation sites. This is an important concern in ecotourism destinations such as Belize and Costa Rica, because they actively promote ecotourism and
Authors
T. A. Farrell, J. L. Marion
Importance of early successional habitat to ruffed grouse and American woodcock Importance of early successional habitat to ruffed grouse and American woodcock
Ruffed grouse (Bonasa umbellus) and American woodcock (Scolopax minor) provide millions of days of recreation each year for people in the eastern United States (U.S). These popular game birds depend on early successional forest habitats throughout much of the year. Ruffed grouse and woodcock populations are declining in the eastern United States as an abundance of shrub-dominated and...
Authors
D.R. Dessecker, D.G. McAuley
Flow and habitat effects on juvenile fish abundance in natural and altered flow regimes Flow and habitat effects on juvenile fish abundance in natural and altered flow regimes
Conserving biological resources native to large river systems increasingly depends on how flow-regulated segments of these rivers are managed. Improving management will require a better understanding of linkages between river biota and temporal variability of flow and instream habitat. However, few studies have quantified responses of native fish populations to multiyear (>2 yr) patterns...
Authors
Mary C. Freeman, Z.H. Bowen, K.D. Bovee, E.R. Irwin
Effects of diquat, an aquatic herbicide, on the development of mallard embryos Effects of diquat, an aquatic herbicide, on the development of mallard embryos
Bipyridylium herbicides produce embryotoxic and teratogenic effects in dipteran, amphibian, avian, and mammalian organisms. Diquat dibromide, a bipyridylium compound, is commonly used as an aquatic herbicide. Mallard (Anas platyrhynchos) eggs were exposed to diquat by immersing the eggs for 10s in solutions of 0.88, 3.5, 7, 14, or 56 g/L on either the fourth or twenty-first day of...
Authors
C.J. Sewalk, G. L. Brewer, D. J. Hoffman
Use of monoclonal antibodies developed against chicken coccidia (Eimeria) to study invasion and development of Eimeria reichenowi in Florida sandhill cranes (Grus canadensis) Use of monoclonal antibodies developed against chicken coccidia (Eimeria) to study invasion and development of Eimeria reichenowi in Florida sandhill cranes (Grus canadensis)
Eimeria gruis and Eimeria reichenowi are common coccidial parasites of a number of species of cranes. Until recently, little was known about either the site for invasion or the dynamics of early development of the crane coccidia because of the difficulty of identifying sporozoites and early developmental stages of these parasites by conventional staining methods. In the present study...
Authors
P.C. Augustine, Glenn H. Olsen, H.D. Danforth, G.F. Gee, M. Novilla
Lice as probes [letter to the editor] Lice as probes [letter to the editor]
No abstract available.
Authors
D.C. Hahn, R.D. Price
Wildlife Study Design Wildlife Study Design
No abstract available.
Authors
M.L. Morrison, W.M. Block, M.D. Strickland, W. L. Kendall
The role of recreation ecology in sustainable tourism and ecotourism The role of recreation ecology in sustainable tourism and ecotourism
No abstract available.
Authors
Y.-F. Leung, J. L. Marion, T. A. Farrell
The effect of chemical weapons incineration on the survival rates of Red-tailed Tropicbirds The effect of chemical weapons incineration on the survival rates of Red-tailed Tropicbirds
In 1992, the Johnston Atoll Chemical Agent Disposal System (JACADS) began incinerating U.S. chemical weapons stockpiles on Johnston Atoll (Pacific Ocean) where about 500,000 seabirds breed, including Red-tailed Tropicbirds (Phaethon rubricauda). We hypothesized that survival rates of birds were lower in those nesting downwind of the incinerator smokestack compared to those upwind, and...
Authors
E.A. Schreiber, G.A. Schenk, P.F. Doherty
Introduction Introduction
No abstract available.
Authors
J. Clobert, J.O. Wolff, J.D. Nichols, E. Danchin, A.A. Dhondt
Ingested metal in whooping cranes: An endoscopic technique for removal and implications for the release program Ingested metal in whooping cranes: An endoscopic technique for removal and implications for the release program
Since 1993 when the whooping crane (Grus americana) release program in Florida started, 21 whooping cranes at the USGS Patuxent Wildlife Research Center (Patuxent) have been diagnosed with gastrointestinal foreign bodies (primarily metal objects). A technique for safely removing these objects has been developed. The technique uses a flexible gastric endoscope to enter the proventriculus...
Authors
Glenn H. Olsen, M. Wise
Recommendations for the attachment of satellite transmitters to cranes Recommendations for the attachment of satellite transmitters to cranes
Recent advances in miniaturization of satellite transmitters have resulted in thumb-sized packages weighing less than 30 g. These are smaller than VHF radios routinely mounted on crane leg bands. With this development and with favorable signal reception results, there is no need for, and much to recommend against the continued use of back-pack mounts. We provide details for leg-mount
Authors
D. H. Ellis, P.W. Howey, Gary L. Krapu