Sequence variation of the glycoprotein gene identifies three distinct lineages within field isolates of viral hemorrhagic septicemia virus, a fish rhabdovirus
A. Benmansour, B. Bascuro, A.F. Monnier, P. Vende, J. R. Winton, P. de Kinkelin
1997, Journal of General Virology (78) 2837-2846
To evaluate the genetic diversity of viral haemorrhagic septicaemia virus (VHSV), the sequence of the glycoprotein genes (G) of 11 North American and European isolates were determined. Comparison with the G protein of representative members of the family Rhabdoviridae suggested that VHSV was a different virus species from infectious haemorrhagic...
The impact of grazing on plant fractal architecture and fitness of a mediterranean shrub (Anthyllis cytisoides L.)
J. Escos, C.L. Alados, J.M. Emlen
1997, Functional Ecology (11) 66-78
1. We examined natural grazing by livestock (sheep and goats) on Albaida Anthyllis cytisoides L. with the aim of determining whether variation in the allometric relationships between plant parts provides a sensitive indicator of the impact of grazing.2. The intra-individual variation in translatory symmetry with scale and increased complexity of...
Diagnosing the flood of 1997 in San Francisco Bay with observations and model results
Noah Knowles, Daniel Cayan, Reginald J. Uncles, Lynn Ingram, Dave Peterson
1997, Interagency Ecological Program Newsletter 28-31
No abstract available. ...
Regionalized loads of sediment and phosphorus to lakes Michigan and Superior—high flow and long-term average
Dale M. Robertson
1997, Journal of Great Lakes Research (23) 416-439
Daily loads of suspended sediment and total phosphorus for the 10-year, 1-day design high flow and average of the 16-year period (1975 to 1990) were computed for 18 well-monitored tributaries to Lake Michigan and Lake Superior by use of constituent-transport models. The loads from these 18 reference tributaries were used...
Proceedings of the third biennial conference of research on the Colorado Plateau
Elena T. Deshler
Charles van Riper III, editor(s)
1997, NPS/NRNAU/NRTP 97-12
The papers in this volume are contributions from federal, state, and private sector researchers, who have come together to share scientific information with land managers on the Colorado Plateau. This Proceedings is the third in a series of publications that focuses on providing information to land managers on baseline scientific...
Evaluation of a mallard HSI model for the Lower Mississippi Valley
D.J. Twedt, Michael W. Brown, James R. Nassar
1997, Proceedings of the Annual Conference of the Southeastern Association of Fish and Wildlife Agencies (51) 319-328
We evaluated a habitat suitability (HSI) model developed for mallards (Anas platyrhynchos) wintering in the Lower Mississippi Valley by comparing mallard densities obtained from aerial surveys with habitat suitability indices derived from satellite imagery for 25, 256km2 sampling units. Regression models that related mallard densities to habitat suitability indices accounted...
Conservation of Mexican wetlands: role of the North American Wetlands Conservation Act
M.H. Wilson, D.A. Ryan
1997, Wildlife Society Bulletin (25) 57-64
Mexico's wetlands support a tremendous biological diversity and provide significant natural resource benefits to local communities. Because they are also critical stopover and wintering grounds for much of North America's waterfowl and other migratory birds, Mexico has become an important participant in continental efforts to conserve these resources through...
Stochastic seasonality and nonlinear density-dependent factors regulate population size in an African rodent
H. Leirs, N. C. Stenseth, J.D. Nichols, J.E. Hines, R. Verhagen, W. Verheyen
1997, Nature (389) 176-180
Ecology has long been troubled by the controversy over how populations are regulated. Some ecologists focus on the role of environmental effects, whereas others argue that density-dependent feedback mechanisms are central. The relative importance of both processes is still hotly debated, but clear examples of both processes acting in...
Capture-recapture survival models taking account of transients
R. Pradel, J.E. Hines, J.D. Lebreton, J.D. Nichols
1997, Biometrics (53) 60-72
The presence of transient animals, common enough in natural populations, invalidates the estimation of survival by traditional capture- recapture (CR) models designed for the study of residents only. Also, the study of transit is interesting in itself. We thus develop here a class of CR models to describe...
Estimation of population trajectories from count data
W.A. Link, J.R. Sauer
1997, Biometrics (53) 488-497
Monitoring of changes in animal population size is rarely possible through complete censuses; frequently, the only feasible means of monitoring changes in population size is to use counts of animals obtained by skilled observers as indices to abundance. Analysis of changes in population size can be severely biased if...
Capture-recapture analysis of a wintering black-capped chickadee population in Connecticut, 1958-1993
G. Loery, James D. Nichols, James E. Hines
1997, The Auk (114) 431-442
We investigated the dynamics of a wintering population of Black-capped Chickadees (Parus atricapillus) using data from a long-term capture-recapture study. Goodness-of-fit and likelihood-ratio tests indicated that the standard Jolly-Seber model was inadequate for the data, so we explored different parameterizations of a model in which survival probability for new captures...
Numerical modeling of late Glacial Laurentide advance of ice across Hudson Strait: Insights into terrestrial and marine geology, mass balance, and calving flux
W.T. Pfeffer, M. Dyurgerov, M. Kaplan, J. Dwyer, C. Sassolas, A. Jennings, B. Raup, W. Manley
1997, Paleoceanography and Paleoclimatology (12) 97-110
A time-dependent finite element model was used to reconstruct the advance of ice from a late Glacial dome on northern Quebec/Labrador across Hudson Strait to Meta Incognita Peninsula (Baffin Island) and subsequently to the 9.9–9.6 ka 14C Gold Cove position on Hall Peninsula. Terrestrial geological and geophysical information from Quebec and...
Biogenic sedimentation beneath the California Current system for the past 30 kyr and its paleoceanographic significance
J.V. Gardner, W.E. Dean, P. Dartnell
1997, Paleoceanography and Paleoclimatology (12) 207-225
A north-south transect of 17 cores was constructed along the eastern boundary of the California Current system from 33° to 42°N to investigate the changes in biogenic sedimentation over the past 30 kyr. Percentages and mass accumulation rates of CaCO3, Corg, and biogenic opal were assembled at 500 to 1000...
Evolution of lek social systems in manakins: alternative models and proofs
M.S. Foster
1997, Book chapter, Anais V. Congresso Brasileiro de Ornitologia
Ecotoxicology of aluminum to fish and wildlife
D. W. Sparling, T. P. Lowe, P.G.C. Campbell
Robert A. Yokel, Mari S. Golub, editor(s)
1997, Book chapter, Research Issues in Aluminum Toxicity
The toxicity of aluminum has been studied extensively in fish, less so in invertebrates, amphibians, and birds, and not at all in reptiles and free-ranging mammals. For aquatic organisms, Al bioavailability and toxicity are intimately related to ambient pH; changes in ambient acidity may affect Al solubility, dissolved Al...
A spatially-explicit modelling environment for evaluating deer management strategies
K.L. Risenhoover, H.B. Underwood, W. Yan, J.L. Cooke
William J. McShea, H. Brian Underwood, John H. Rappole, editor(s)
1997, Book chapter, The science of overabundance: deer ecology and population management
Modeling the population dynamics of Gulf Coast sandhill cranes
Douglas H. Johnson, W. L. Kendall
R.P. Urbanek, D.W. Stahlecker, editor(s)
1997, Book chapter, Proceedings of the seventh North American Crane Workshop
The Midcontinental population of sandhill cranes (Grus canadensis) has a large geographic range, contains nearly 500,000 birds, and is hunted in much of its range. The population includes three subspecies; the numbers of two of these are uncertain, and they should be afforded protection from hunting that would be...
Multispecies lottery competition: a diffusion analysis
Jeff S. Hatfield, P.L. Chesson
S. Tuljapurkar, H. Caswell, editor(s)
1997, Book chapter, Structured-Population Models in Marine, Terrestrial, and Freshwater Systems
The lottery model is a stochastic competition model designed for space-limited communities of sedentary organisms. Examples of such communities include coral reef fishes, aquatic sessile organisms, and many plant communities. Explicit conditions for the coexistence of two species and the stationary distribution of the two-species model were determined...
Evaluation of semen from nondomestic birds
G.F. Gee
M.R. Bakst, H.C. Cecil, editor(s)
1997, Book chapter, Techniques for Semen Evaluation, Semen Storage, and Fertility Determination
Aspects of poultry Al technology are applicable to nondomestic birds. However, modifications in the methods of semen collection, evaluation, and insemination are often necessary to accommodate either the bird's size, sperm numbers, or. female anatomy. This section provides a brief overview of procedures used to evaluate semen from nondomestic birds....
Executive summary of vision and options for the future of the US National Strong-Motion Program
Committee for the Future of the US National Strong-Motion Program
1997, Open-File Report 97-530-A
These reports are presented in response to a charge of the Earthquake Hazards Reduction Program (EHRP) Program Council of the U.S. Geological Survey to 'define the future of the USGS National Strong-Motion Program (NSMP)' (Appendix A). The council requested that a 'Vision Paper' and an 'Options Document' be prepared. Each...
Hydrogeology and ground-water flow in the Edwards-Trinity aquifer-system, west-central, Texas
Eve L. Kuniansky, Ann F. Ardis
1997, Professional Paper 1421-C
Two finite-element ground-water flow models were developed for the Edwards–Trinity aquifer system, west-central Texas, to gain a better understanding of the flow system; one ground-water flow model was developed at a large scale to simulate the regional system and contiguous, hydraulically connected units, and one model was constructed at a...
Effective number of breeding adults in Bufo bufo estimated from age-specific variation at minisatellite loci
K.T. Scribner, J.W. Arntzen, T. Burke
1997, Molecular Ecology (6) 701-712
Estimates of the effective number of breeding adults were derived for three semi-isolated populations of the common toad Bufo bufo based on temporal (i.e. adult-progeny) variance in allele frequency for three highly polymorphic minisatellite loci. Estimates of spatial variance in allele frequency among populations and of age-specific measures of genetic variability are...
Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP
Evan R. Anderman, Mary Catherine Hill
1997, Open-File Report 97-14
No abstract available....
Reworking of aggraded debris fans by the 1996 controlled flood on the Colorado River in Grand Canyon National Park, Arizona
Robert H. Webb, T.S. Melis, Peter G. Griffiths, J. G. Elliott
1997, Open-File Report 97-16
Debris flows from 600 tributaries in Grand Canyon periodically deposit poorly sorted sediment on debris fans along the Colorado River between Lakes Powell and Mead. Before regulation, stable fans and rapids along the river resulted from the interaction of tributary debris flows and large, mainstem floods. Floods in the Colorado...
Predicting coastal flooding and wetland loss
Thomas W. Doyle
1997, Fact Sheet 094-97
The southeastern coastal region encompasses vast areas of wetland habitat important to wildlife and other economically valuable natural resources. Located on the interface between sea and land, these wetland habitats are affected by both sea-level rise and hurricanes, and possibly by hydroperiod associated with regional climatic shifts. Increased sea level...
