Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16759
Historical trends in salinity and substrate in central and northern Florida Bay: A Paleoecological Reconstruction using modern analogue data Historical trends in salinity and substrate in central and northern Florida Bay: A Paleoecological Reconstruction using modern analogue data
Understanding the natural spatial and temporal variability that exists within an ecosystem is a critical component of efforts to restore systems to their natural state. Analysis of benthic foraminifers and molluscs from modern monitoring sites within Florida Bay allows us to determine what environmental parameters control spatial and temporal variability of their assemblages. Faunal...
Authors
G. Lynn Wingard, Scott E. Ishman
An evaluation of six internal anchor tags for tagging juvenile striped bass An evaluation of six internal anchor tags for tagging juvenile striped bass
Six types of internal anchor tags were compared for retention, legibility, and durability in tagging juvenile (age-0) striped bass Morone saxatilis. Tank-reared striped bass (120–200 mm total length) were tagged with coded wire tags and one of six types of internal anchor tags (500 fish each tag type and two groups of controls). The types of internal anchor tags used were as follows...
Authors
A. Henderson-Arzapalo, P. Rago, J. Skjeveland, M. Mangold, P. Washington, J. Howe, T. King
Map showing the potential for mineral deposits associated with Precambrian mafic and ultramafic rocks in the Blacktail and Henrys Lake Mountains and the Greenhorn and Ruby Ranges of southwestern Montana Map showing the potential for mineral deposits associated with Precambrian mafic and ultramafic rocks in the Blacktail and Henrys Lake Mountains and the Greenhorn and Ruby Ranges of southwestern Montana
In response to requests from the Bureau of Land Management (BLM) and the U.S. Forest Service (USFS), the U.S. Geological Survey (USGS) conducted a mineral resource assessment in the Dillon BLM Resource Area in Beaverhead and Madison Counties, southwestern Montana. These agencies use mineral resource data in creating and updating land-use management plans for federal lands for the...
Authors
Jane M. Hammarstrom, Bradley S. Van Gosen, Robert R. Carlson, Dolores M. Kulik
Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor
Among the waterfowl affected by white phosphorus (P4) at a military base in Alaska are tundra (Cygnus columbianus) and trumpeter (C. buccinator) swans. To estimate the toxicity of P4 to swans and compare the toxic effects to those of mallards (Anas platyrhynchos), we dosed 30 juvenile mute swans (C. olor) with 0 to 5.28 mg P4/kg body weight. The calculated LD50 was 3.65 mg/kg (95% CI: 1...
Authors
D. W. Sparling, Daniel D. Day, P. Klein
Migration timing of Atlantic salmon smolts relative to environmental and physiological factors Migration timing of Atlantic salmon smolts relative to environmental and physiological factors
We determined the migration timing of fry‐stocked smolts of Atlantic salmon Salmo salar relative to environmental and physiological factors, by using net weirs and counting fences in three tributaries of the West River, Vermont. Smolt migration began in late April and early May when water temperature was 5°C, peak movements occurred in early and mid‐May at temperatures exceeding 8°C, and...
Authors
K.G. Whalen, D.L. Parrish, S. D. McCormick
Effect of slope and headpond on passage of American shad and blueback herring through simple Denil and deepened Alaska steeppass fishways Effect of slope and headpond on passage of American shad and blueback herring through simple Denil and deepened Alaska steeppass fishways
Passage and transit time of adult upstream-migrant American shad Alosa sapidissima and blueback herring A. aestivalis were investigated in standard Denil and Alaska steeppass fishways with variable slope and headpond under semicontrolled conditions. Percent of American shad passed per unit time (percent passage) increased with temperature, while time required to ascend from the fishway...
Authors
Alexander J. Haro, Mufeed Odeh, Theodore Castro-Santos, John Noreika
The influence of sampling interval on the accuracy of trail impact assessment The influence of sampling interval on the accuracy of trail impact assessment
Trail impact assessment and monitoring (IA&M) programs have been growing in importance and application in recreation resource management at protected areas. Census-based and sampling-based approaches have been developed in such programs, with systematic point sampling being the most common survey design. This paper examines the influence of sampling interval on the accuracy of estimates...
Authors
Y.-F. Leung, J. L. Marion
Of elephants and blind men: Deer management in the U.S. National Parks Of elephants and blind men: Deer management in the U.S. National Parks
Overabundant populations of white-tailed deer (Odocoileus virginianus) are becoming common in the eastern United States. Faced with burgeoning deer populations in eastern parks, the National Park Service (NPS) formulated policy based on its long experience with ungulate management in western parks. That the NPS failed to find a management solution acceptable to its many constituencies...
Authors
W.F. Porter, H. Brian Underwood
Factors influencing estimation of pesticide-related wildlife mortality Factors influencing estimation of pesticide-related wildlife mortality
Free-ranging wildlife is regularly exposed to pesticides and can serve as a sentinel for human and environmental health. Therefore a comprehensive pesticide hazard assessment must incorporate the effects of actual applications on free-ranging wildlife. Mortality is the most readily reported wildlife effect, and the significance of these data can be realized only when placed in context...
Authors
N.B. Vyas
Influence of temperature and substrate on infection rate, triactinomyxon production, and release duration from eastern tubifex worms infected with Myxobolus cerebralis Influence of temperature and substrate on infection rate, triactinomyxon production, and release duration from eastern tubifex worms infected with Myxobolus cerebralis
Salmonid whirling disease is caused by Myxobolus cerebralis, a metazoan parasite with a two host life cycle involving salmonid fish a an aquatic oligochaete, Tubifex tubifex (Wolf, Markiw and Hiltunen, 1986). Whirling disease has been reported in 22 U.S. states with the greatest losses occurring in the salmonid fisheries of western and Midwestern states. Although whirling disease is...
Authors
Thomas Waldrop, Vicki Blazer, David Smith, Bane Schill, Christine Densmore
Preliminary effects of water hardness on triactinomyxon production and development from eastern tubifex worms infected with Myxobolus cerebralis Preliminary effects of water hardness on triactinomyxon production and development from eastern tubifex worms infected with Myxobolus cerebralis
Whirling disease is caused by Myxobolus cerebralis and requires an intermediate oligochaete host identified as Tubifex tubifex (Wolf, Markiw, and Hiltunen, 1986). M. cerebralis spores ingested by the tubifex worms develop into triactinomyxons (tams) that are eventually released into the water column to infect salmonid fish. There may be many environmental parameters, biotic or abiotic...
Authors
Thomas B. Waldrop, Christine Densmore, Vicki Blazer, Dave Smith, Bane Schill
Neoproterozoic(?) to Pennsylvanian inner-shelf, miogeoclinal strata in Sierra Agua Verde, Sonora, Mexico Neoproterozoic(?) to Pennsylvanian inner-shelf, miogeoclinal strata in Sierra Agua Verde, Sonora, Mexico
No abstract available.
Authors
John H. Stewart, Forrest G. Poole, Anita G. Harris, John E. Repetski, Bruce R. Wardlaw, Bernard L. Mamet, J. M. Morales-Ramirez