Evaluation of a method for determining concentrations of isoeugenol, an AQUI-S residue, in fillet tissue from freshwater fish species.
J.R. Meinertz, Theresa M. Schreier, J.A. Bernardy
2008, Journal of AOAC International (91) 884-891
AQUI-S is a fish anesthetic/sedative that is approved for use in a number of countries throughout the world and has the potential for use in the United States. The active ingredient in AQUI-S is isoeugenol. A method for determining isoeugenol concentrations in edible fillet tissue is needed for regulatory purposes,...
SAGE celebrates 25 years of learning geophysics by doing geophysics
G.R. Jiracek, W.S. Baldridge, A.J. Sussman, S. Biehler, L.W. Braile, J.F. Ferguson, B.E. Gilpin, D.K. McPhee, L. Pellerin
2008, Leading Edge (Tulsa, OK) (27) 1340-1344
The increasing world demand and record-high costs for energy and mineral resources, along with the attendant environmental and climate concerns, have escalated the need for trained geophysicists to unprecedented levels. This is not only a national need; it's a critical global need. As Earth scientists and educators we must seriously...
Inverse modeling of surface-water discharge to achieve restoration salinity performance measures in Florida Bay, Florida
E.D. Swain, D.E. James
2008, Journal of Hydrology (351) 188-202
The use of numerical modeling to evaluate regional water-management practices involves the simulation of various alternative water-delivery scenarios, which typically are designed intuitively rather than analytically. These scenario simulations are used to analyze how specific water-management practices affect factors such as water levels, flows, and salinities. In lieu of testing...
Compound-specific isotope analysis: Questioning the origins of a trichloroethene plume
S. M. Eberts, C. Braun, S. Jones
2008, Environmental Forensics (9) 85-95
Stable carbon isotope ratios of trichloroethene (TCE), cis-1,2- dichloroethene, and trans-1,2-dichloroethene were determined by use of gas chromatography-combustion-isotope ratio mass spectroscopy to determine whether compound-specific stable carbon isotopes could be used to help understand the origin and history of a TCE groundwater plume in Fort Worth, TX. Calculated ??13C values...
Chemical and mineralogical characteristics of French green clays used for healing
Lynda B. Williams, Shelley E. Haydel, Rossman F. Giese, Dennis D. Eberl
2008, Clays and Clay Minerals (56) 437-452
The worldwide emergence of infectious diseases, together with the increasing incidence of antibiotic-resistant bacteria, elevate the need to properly detect, prevent, and effectively treat these infections. The overuse and misuse of common antibiotics in recent decades stimulates the need to identify new inhibitory agents. Therefore, natural products like clays, that...
The Breccia Museo formation, Campi Flegrei, southern Italy: Geochronology, chemostratigraphy and relationship with the Campanian Ignimbrite eruption
L. Fedele, C. Scarpati, M. Lanphere, L. Melluso, V. Morra, A. Perrotta, G. Ricci
2008, Bulletin of Volcanology (70) 1189-1219
The Breccia Museo is one of the most debated volcanic formations of the Campi Flegrei volcanic district. The deposit, made up of six distinctive stratigraphic units, has been interpreted by some as the proximal facies of the major caldera-forming Campanian Ignimbrite eruption, and by others as the product of...
Electromagnetic surveying of seafloor mounds in the northern Gulf of Mexico
M. Ellis, R.L. Evans, D. Hutchinson, P. Hart, J. Gardner, R. Hagen
2008, Marine and Petroleum Geology (25) 960-968
Seafloor controlled source electromagnetic data, probing the uppermost 30 m of seafloor sediments, have been collected with a towed magnetic dipole-dipole system across two seafloor mounds at approximately 1300 m water depth in the northern Gulf of Mexico. One of these mounds was the focus of??a recent gas hydrate research...
Observations of mixed-aged litters in brown bears
J. E. Swenson, M.A. Haroldson
2008, Ursus (19) 73-79
We report on 3 cases of mixed-aged litters (young born in different years) in brown bears (Ursus arctos); in 1 instance the cub-of-the-year (hereafter called cubs) died in the den. Two cases occurred in Sweden after mothers were separated from their young during the breeding season. In one, the mother...
Comparison of rainbow smelt age estimates from fin rays and otoliths
M. G. Walsh, A.P. Maloy, T. P. O’Brien
2008, North American Journal of Fisheries Management (28) 42-49
Rainbow smelt Osmerus mordax, although nonnative, are an important component of the offshore food web in the Laurentian Great Lakes. In Lake Ontario, we estimate ages of rainbow smelt annually to study population dynamics such as year-class strength and age-specific growth and mortality. Since the early 1980s, we have used...
Congruent population structure inferred from dispersal behaviour and intensive genetic surveys of the threatened Florida scrub-jay (Aphelocoma cœrulescens)
A. Coulon, J.W. Fitzpatrick, R. Bowman, B.M. Stith, C.A. Makarewich, L.M. Stenzler, I.J. Lovette
2008, Molecular Ecology (17) 1685-1701
The delimitation of populations, defined as groups of individuals linked by gene flow, is possible by the analysis of genetic markers and also by spatial models based on dispersal probabilities across a landscape. We combined these two complimentary methods to define the spatial pattern of genetic structure among remaining populations...
Studies on geological background and source of fluorine in drinking water in the North China Plate fluorosis areas
K. Luo, F. Feng, H. Li, C. L. Chou, Z. Feng, D. Yunshe
2008, Toxicological and Environmental Chemistry (90) 237-246
Endemic fluorosis in northern China is usually produced by high fluorine (F) content in drinking water. Thirty-one samples of drinking waters, mainly well waters and nearly 200 samples of rocks, loess, and coal were analyzed for F content using the combustion hydrolysis-fluoride-ion selective electrode (ISE) method. The geologic cross sections...
Global change and biological soil crusts: Effects of ultraviolet augmentation under altered precipitation regimes and nitrogen additions
J. Belnap, S. L. Phillips, S. Flint, J. Money, M. Caldwell
2008, Global Change Biology (14) 670-686
Biological soil crusts (BSCs), a consortium of cyanobacteria, lichens, and mosses, are essential in most dryland ecosystems. As these organisms are relatively immobile and occur on the soil surface, they are exposed to high levels of ultraviolet (UV) radiation and atmospheric nitrogen (N) deposition, rising temperatures, and alterations in precipitation...
Dietary biomagnification of organochlorine contaminants in Alaskan polar bears
T.W. Bentzen, Erich H. Follmann, Steven C. Amstrup, G.S. York, M. J. Wooller, D.C.G. Muir, T. M. O'Hara
2008, Canadian Journal of Zoology (86) 177-191
Concentrations of organochlorine contaminants in the adipose tissue of polar bears (Ursus maritimus Phipps, 1774) vary throughout the Arctic. The range in concentrations has not been explained fully by bear age, sex, condition, location, or reproductive status. Dietary pathways expose polar bears to a variety of contaminant profiles and concentrations....
Biomarkers of mercury exposure at a mercury recycling facility in Ukraine
H.J. Gibb, K. Kozlov, J.P. Buckley, J. Centeno, V. Jurgenson, A. Kolker, K. Conko, E. Landa, B. Panov, Y. Panov, H. Xu
2008, Journal of Occupational and Environmental Hygiene (5) 483-489
This study evaluates biomarkers of occupational mercury exposure among workers at a mercury recycling operation in Gorlovka, Ukraine. The 29 study participants were divided into three occupational categories for analysis: (1) those who worked in the mercury recycling operation (Group A, n = 8), (2) those...
Terrace aggradation during the 1978 flood on Powder River, Montana, USA
J. A. Moody, R.H. Meade
2008, Geomorphology (99) 387-403
Flood processes no longer actively increase the planform area of terraces. Instead, lateral erosion decreases the area. However, infrequent extreme floods continue episodic aggradation of terraces surfaces. We quantify this type of evolution of terraces by an extreme flood in May 1978 on Powder River in southeastern Montana. Within an...
Ecological community integration increases with added trophic complexity
Christopher K. Wright
2008, Ecological Complexity (5) 140-145
The existence of functional biological organization at the level of multi-species communities has long been contested in ecology and evolutionary biology. I found that adding a trophic level to simulated ecological communities enhanced their ability to compete at the community level, increasing the likelihood of one community forcing all or...
Application of multiple isotopic and geochemical tracers for investigation of recharge, salinization, and residence time of water in the Souss-Massa aquifer, southwest of Morocco
L. Bouchaou, J.L. Michelot, A. Vengosh, Y. Hsissou, M. Qurtobi, C.B. Gaye, T.D. Bullen, G.M. Zuppi
2008, Journal of Hydrology (352) 267-287
Groundwater and surface water in Souss-Massa basin in the west-southern part of Morocco is characterized by a large variation in salinity, up to levels of 37 g L-1. The high salinity coupled with groundwater level decline pose serious problems for current irrigation and domestic water supplies as well as future...
Fidelity and breeding probability related to population density and individual quality in black brent geese Branta bernicla nigricans
James S. Sedinger, N.D. Chelgren, David H. Ward, M. S. Lindberg
2008, Journal of Animal Ecology (77) 702-712
1. Patterns of temporary emigration (associated with non-breeding) are important components of variation in individual quality. Permanent emigration from the natal area has important implications for both individual fitness and local population dynamics. 2. We estimated both permanent and temporary emigration of black brent geese (Branta bernicla nigricans Lawrence) from...
Evaluation of statistical treatments of left-censored environmental data using coincident uncensored data sets: I. Summary statistics
Ronald C. Antweiler, Howard E. Taylor
2008, Environmental Science & Technology (42) 3732-3738
The main classes of statistical treatment of below-detection limit (left-censored) environmental data for the determination of basic statistics that have been used in the literature are substitution methods, maximum likelihood, regression on order statistics (ROS), and nonparametric techniques. These treatments, along with using all instrument-generated data (even those below detection),...
Predicting the locations of naturally fishless lakes
Emily Gaenzle Schilling, C.S. Loftin, K.E. Degoosh, Alexander D. Huryn, K.E. Webster
2008, Freshwater Biology (53) 1021-1035
1. Fish have been introduced into many previously fishless lakes throughout North America over the past 100+ years. It is difficult to determine the historical distribution of fishless lakes, however, because these introductions have not always been well-documented. 2. Due to its glacial history and low human population density, the...
Effects of spatial resolution ratio in image fusion
Y. Ling, M. Ehlers, E.L. Usery, M. Madden
2008, International Journal of Remote Sensing (29) 2157-2167
In image fusion, the spatial resolution ratio can be defined as the ratio between the spatial resolution of the high-resolution panchromatic image and that of the low-resolution multispectral image. This paper attempts to assess the effects of the spatial resolution ratio of the input images on the quality of the...
Rayleigh-wave dispersive energy imaging using a high-resolution linear radon transform
Y. Luo, J. Xia, R. D. Miller, Y. Xu, J. Liu, Q. Liu
2008, Pure and Applied Geophysics (165) 903-922
Multichannel Analysis of Surface Waves (MASW) analysis is an efficient tool to obtain the vertical shear-wave profile. One of the key steps in the MASW method is to generate an image of dispersive energy in the frequency-velocity domain, so dispersion curves can be determined by picking peaks of dispersion energy....
Variations in pesticide leaching related to land use, pesticide properties, and unsaturated zone thickness
R.M.T. Webb, M.E. Wieczorek, B. T. Nolan, T.C. Hancock, Mark W. Sandstrom, J.E. Barbash, E.R. Bayless, R. W. Healy, J. Linard
2008, Journal of Environmental Quality (37) 1145-1157
Pesticide leaching through variably thick soils beneath agricultural fields in Morgan Creek, Maryland was simulated for water years 1995 to 2004 using LEACHM (Leaching Estimation and Chemistry Model). Fifteen individual models were constructed to simulate five depths and three crop rotations with associated pesticide applications. Unsaturated zone thickness averaged 4.7...
Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)
D.P. Peterson, B.E. Rieman, J. B. Dunham, K.D. Fausch, M.K. Young
2008, Canadian Journal of Fisheries and Aquatic Sciences (65) 557-573
Native salmonid fishes often face simultaneous threats from habitat fragmentation and invasion by nonnative trout species. Unfortunately, management actions to address one may create or exacerbate the other. A consistent decision process would include a systematic analysis of when and where intentional use or removal of barriers is the most...
Diversity, origins and virulence of Avipoxviruses in Hawaiian Forest Birds
S.I. Jarvi, D. Triglia, A. Giannoulis, M. Farias, K. Bianchi, C. T. Atkinson
2008, Conservation Genetics (9) 339-348
We cultured avian pox (Avipoxvirus spp.) from lesions collected on Hawai'i, Maui, Moloka'i, and 'Oahu in the Hawaiian Islands from 15 native or non-native birds representing three avian orders. Phylogenetic analysis of a 538 bp fragment of the gene encoding the virus 4b core polypeptide revealed two distinct variant clusters,...
