Estimation of octanol/water partition coefficients using LSER parameters
Dean C. Luehrs, James P. Hickey, Kalpana A. Godbole, Tony N. Rogers
1998, Advances in Environmental Research (2) 181-185
The logarithms of octanol/water partition coefficients, logKow, were regressed against the linear solvation energy relationship (LSER) parameters for a training set of 981 diverse organic chemicals. The standard deviation for logKow was 0.49. The regression equation was then used to estimate logKow for a test of 146 chemicals...
Breeding biology of Acadian flycatchers in a bottomland hardwood forest
R.R. Wilson, R.J. Cooper
1998, The Wilson Bulletin (110) 226-232
From 1993-1995, we located and monitored 601 Acadian Flycatcher (Empidonax virescens) nests in a large contiguous tract of bottomland hardwood forest on the White River National Wildlife Refuge, Arkansas. Annual reproductive success was significantly different among years; ranging from 10-25% (Mayfield estimate) over the three years of the study....
Size-sex variation in survival rates and abundance of pig frogs, Rana grylio, in northern Florida wetlands
K.V. Wood, J.D. Nichols, H.F. Percival, J.E. Hines
1998, Journal of Herpetology (32) 527-535
During 1991-1993, we conducted capture-recapture studies on pig frogs, Rana grylio, in seven study locations in northcentral Florida. Resulting data were used to test hypotheses about variation in survival probability over different size-sex classes of pig frogs. We developed multistate capture-recapture models for the resulting data and used...
Variations in growth of roseate tern (Sterna dougallii) chicks: II. Early growth as an index of parental quality
I.C.T. Nisbet, J. A. Spendelow, Jeff S. Hatfield, James M. Zingo, G.A. Gough
1998, Condor (100) 305-315
We measured growth of Roseate Tern (Sterna dougallii) chicks at a colony in Connecticut in 10 successive years. Data on body mass during the first three to four days of life were fitted to a quadratic regression model, yielding three parameters of early growth for each of 1,551 chicks:...
Effects of radio transmitters on migrating wood thrushes
L.A. Powell, D.G. Krementz, J. D. Lang, M.J. Conroy
1998, Journal of Field Ornithology (69) 306-315
We quantified the effects of radio transmitters on Wood Thrushes (Hylocichla mustelina) using 4 yr of banding and telemetry data from Piedmont National Wildlife Refuge, Georgia. Flight performance models suggest that the 1.6-g transmitter shortens the migratory range of Wood Thrushes by only 60 km, and the estimated migratory...
Estimating rates of local species extinction, colonization and turnover in animal communities
James D. Nichols, T. Boulinier, J.E. Hines, K. H. Pollock, J.R. Sauer
1998, Ecological Applications (8) 1213-1225
Species richness has been identified as a useful state variable for conservation and management purposes. Changes in richness over time provide a basis for predicting and evaluating community responses to management, to natural disturbance, and to changes in factors such as community composition (e.g., the removal of a keystone...
Inference methods for spatial variation in species richness and community composition when not all species are detected
J.D. Nichols, T. Boulinier, J.E. Hines, K. H. Pollock, J.R. Sauer
1998, Conservation Biology (12) 1390-1398
Inferences about spatial variation in species richness and community composition are important both to ecological hypotheses about the structure and function of communities and to community-level conservation and management. Few sampling programs for animal communities provide censuses, and usually some species in surveyed areas are not detected. Thus, counts of...
Estimating relative abundance from count data
William A. Link, John R. Sauer
1998, Austrian Journal of Statistics (27) 83-97
Much of the available information on large-scale patterns of animal abundance is based on count surveys. The data provided by such surveys are often influenced by nuisance factors affecting the numbers of animals counted, but unrelated to population size. Temporal and spatial patterns in nuisance factors may exist, causing simple...
Brood sizes of sympatric American black ducks and mallards in Maine
J. R. Longcore, D.A. Clugston, D.G. McAuley
1998, Journal of Wildlife Management (62) 142-151
The long-term decline of the American black duck (Anas rubripes) population has been attributed to lower productivity of black ducks that might have been excluded from fertile agricultural wetlands by mallards (Anas platyrhynchos). We monitored broods on 53 wetlands in 1993 and on 58 wetlands in 1994 to determine mean...
Effect of restrictive harvest regulations on survival and recovery rates of American black ducks
C.M. Francis, J.R. Sauer, J.R. Serie
1998, Journal of Wildlife Management (62) 1544-1557
Population management of waterfowl requires an understanding of the effects of changes in hunting regulations on harvest and survival rates. Mean survival and recovery rates of American black ducks (Anas rubripes) were estimated during 3 periods of increasingly restrictive harvest regulations: 1950-66, 1967-82, and 1983-93. From the first...
Evaluation of age determination techniques for gray wolves
D.B. Landon, C.A. Waite, R. O. Peterson, L.D. Mech
1998, Journal of Wildlife Management (62) 674-682
We evaluated tooth wear, cranial suture fusion, closure of the canine pulp cavity, and cementum annuli as methods of age determination for known- and unknown-age gray wolves (Canis lupus) from Alaska, Minnesota, Ontario, and Isle Royale, Michigan. We developed age classes for...
Estimating population change from count data: Application to the North American Breeding Bird Survey
William A. Link, John R. Sauer
1998, Ecological Applications (8) 258-268
For birds and many other animal taxa, surveys that collect count data form a primary source of information on population change. Because counts are only indices to population size, care must be taken in using them in analyses of population change. Temporal or geographic differences in the proportion...
The North American Bird Banding Program: Into the 21st century
P. A. Buckley, C.M. Francis, P. Blancher, D.F. DeSante, C.S. Robbins, G. Smith, P. Cannell
1998, Journal of Field Ornithology (69) 511-529
The authors examined the legal, scientific, and philosophical underpinnings of the North American Bird Banding Program [BBP], with emphasis on the U.S. Bird Banding Laboratory [BBL], but also considering the Canadian Bird Banding Office [BBO]. In this report, we review the value of banding data, enumerate and expand on...
Modeling colony site dynamics: A case study of gull-billed terns (Sterna nilotica) in coastal Virginia
R.M. Erwin, J.D. Nichols, T.B. Eyler, Daniel B. Stotts, B.R. Truitt
1998, The Auk (115) 970-978
We developed a Markov process model for colony-site dynamics of Gull-billed Terns (Sterna nilotica). From 1993 through 1996, we monitored breeding numbers of Gull-billed Terns and their frequent colony associates, Common Terns (Sterna hirundo) and Black Skimmers (Rynchops niger), at colony sites along 80 km of the barrier island region...
Metal concentrations in aquatic macrophytes as influenced by soil and acidification
D. W. Sparling, T. P. Lowe
1998, Water, Air, & Soil Pollution (108) 203-221
Bioavailability of metals to aquatic plants is dependent on many factors including ambient metal concentration, pH of soil or water, concentration of ligands, competition with other metals for binding sites, and mode of exposure. Plants may be exposed to metals through water, air, or soil, depending on growth form....
Systematic studies of Oryzomyine rodents (Muridae, Sigmodontinae): diagnoses and distributions of species formerly assigned to Oryzomys 'capito'
G.G. Musser, M.D. Carleton, E.M. Brothers, A. L. Gardner
1998, Bulletin of the American Museum of Natural History No. 236.
We describe the morphological species-boundaries and geographic distributions of ten Neotropical Oryzomys based on analyses of museum specimens (skins and skulls, examples preserved in fluid, chromosomal spreads, and information about collection sites from skin tags, field catalogs, and other sources). These species have been regarded as members of an...
Eyrie enhancement measures to bolster Saker falcon populations in Mongolia
D. H. Ellis, P. Tsengag, P.L. Whitlock
1998, Book chapter, Raptor Research Foundation Annual Meeting, Program and Abstracts, Ogden, Utah, 30 September-4 October
Because the massive harvest of Saker Falcons (Falco cherrug) in Central Asia has already impacted local populations at least in Kazakhstan, because falcon smuggling has recently become rampant in China, and because a government-authorized harvest has begun in Mongolia, we sought measures to bolster numbers in Mongolia before the population...
Demography of forest birds in Panama: How do transients affect estimates of survival rates?
J. D. Brawn, J.R. Karr, J.D. Nichols, W.D. Robinson
N.J. Adams, R.H. Slotow, editor(s)
1998, Book chapter, Proceedings 22nd International Ornithological Congress, Durban 16-22 August 1998, Abstracts of plenaries, symposia and Round Table Discussions
Estimates of annual survival rates for a multispecies sample of neotropical birds from Panama have proven controversial. Traditionally, tropical birds were thought to have high survival rates for their size, but analyses by Kart et al. (1990. Am. Nat. 136:277-91) contradicted that view, suggesting tropical birds may not have systematically...
Effects of landscape composition and wetland fragmentation on frog and toad abundance and species richness in Iowa and Wisconsin, USA [abstract]
M. G. Knutson, J.R. Sauer, D.A. Olsen, M.J. Mossman, L.M. Hemesath, M.J. Lannoo
1998, Book chapter, Midwest Declining Amphibians Conference, a joint meeting of the Great Lakes and Central Division Working Groups of the Declining Amphibian Populations Task Force, March 20 & 21, 1998
We examined the relationships between anuran diversity and landscape features in the Upper Midwestern United States. Anuran relative abundance and species richness were measured using data collected by Wisconsin and Iowa state calling surveys conducted from 1990-1995. Landscape features surrounding survey points were determined using National Wetland Inventory...
The Wisconsin Frog and Toad Survey: Update and 1984-97 trends [abstract]
M.J. Mossman, L. Hartman, J. Sauer, R. Hay, B. Dhuey
1998, Book chapter, Midwest Declining Amphibians Conference: A Joint Meeting of the Great Lakes and Central Division Working Groups of the Declining Amphibian Populations Task Force, March 20 and 21, 1998
The Wisconsin Frog and Toad Survey (WFTS) is a volunteer-based, roadside auditory count that began in 1981. It's protocols were recently modified for continent-wide use by the North American Amphibian Monitoring Plan (NAAMP). In 1997 we initiated a study to compare data collected by the WFTS and NAAMP protocols, in...
Experimental analysis and simulation modeling of forest management impacts on wood thrushes, Hylocichla mustelina
Richard C. Banks
1998, Book
North American Breeding Bird Survey data show that wood thrush (Hylocichla mustelina) populations in eastern U.S. forests have declined 1.8% per year during 1966-95. The declining quality of breeding forest tracts in North America is one possible cause for the apparent decline of some neotropical migratory birds, such as...
A finite-element surface-water model of flow-way cell 1 of the Everglades Nutrient Removal Project, south Florida
Jonathan K. Lee, Mariano Guardo
1998, Water-Resources Investigations Report 97-4159
Design, operation, and data analysis for a wireline packer system in open boreholes, with field-test results from Belvidere, Illinois
Frederick L. Paillet, A.E. Hess, John H. Williams
1998, Open-File Report 98-413
A wireline-operated packer was designed for use with a standard geophysical logging system. The packer probe consists of a downhole packer inflated with water removed from the borehole by an in-line submersible pump, and a differential pressure transducer calibrated to measure the hydraulic-head difference between the zones above and below...
Sedimentation and bathymetric change in San Pablo Bay: 1856-1983
Bruce E. Jaffe, Richard E. Smith, Laura Zink Torresan
1998, Open-File Report 98-759
A long-term perspective of erosion and deposition in San Francisco Bay is vital to understanding and managing wetland change, harbor and channel siltation, and other sediment-related phenomena such as particle and particle-associated substance (pollutants, trace metals, etc.) transport and deposition. A quantitative comparison of historical hydrographic surveys provides this perspective....
Modeling solute-transport and biodegradation with BIOMOC
Hedeff I. Essaid, Barbara A. Bekins
1998, Fact Sheet 095-98
No abstract available. ...
