Evaluation of a 16-inch minimum length limit for smallmouth bass in Pallette Lake, Wisconsin
S.P. Newman, M.H. Hoff
2000, North American Journal of Fisheries Management (20) 90-99
We evaluated a 16-in minimum length limit and two-fish daily bag limit for smallmouth bass Micropterus dolomieu in Pallette Lake, Wisconsin, from 1989 to 1996. Fish abundance, biomass, growth, survival, and angler harvest were compared with data from years when no length or bag limits were in force. Angler harvest...
Sizes of prey consumed by two pelagic predators in US reservoirs: Implications for quantifying biomass of available prey
D.E. Dennerline, M.J. Van Den Avyle
2000, Fisheries Research (45) 147-154
Striped bass Morone saxatilis and hybrid bass M. saxatilis x M. chrysops have been stocked to establish fisheries in many US reservoirs, but success has been limited by a poor understanding of relations between prey biomass and predator growth and survival. To define sizes of prey that are morphologically available,...
Superfund GIS - 1:250,000 Geology of Tennessee
D.C. Greene, W.J. Wolfe
2000, Report
This data set is a digital representation of the printed 1:250,000 geologic maps from the Tennessee Department of Environment and Conservation, Division of Geology. The coverage was designed primarily to provide a more detailed geologic base than the 1:2,500,000 King and Beikman (1974). 1:24,000 scale coverage of the state...
Comparison of precipitation chemistry in the Central Rocky Mountains, Colorado, USA
K. Heuer, K.A. Tonnessen, G.P. Ingersoll
2000, Atmospheric Environment (34) 1713-1722
Volume-weighted mean concentrations of nitrate (NO3-), ammonium (NH4+), and sulfate (SO42-) in precipitation were compared at high-elevation sites in Colorado from 1992 to 1997 to evaluate emission source areas to the east and west of the Rocky Mountains. Precipitation chemistry was measured by two sampling methods, the National Atmospheric Deposition...
An in vivo model fish system to test chemical effects on sexual differentiation and development: exposure to ethinyl estradiol
Diana M. Papoulias, Douglas B. Noltie, Donald E. Tillitt
2000, Aquatic Toxicology (48) 37-50
A model system was characterized which may be used as an in vivo screen for effects of chemicals or environmental mixtures on sexual differentiation and development of reproductive organs and gametes. We evaluated the effects of a model environmental estrogen, ethinyl estradiol (EE2), on the d-rR strain of medaka, Oryzias...
Occurrence of pesticides in rain and air in urban and agricultural areas of Mississippi, April-September 1995
R.H. Coupe, M.A. Manning, W.T. Foreman, D. A. Goolsby, M.S. Majewski
2000, Science of Total Environment (248) 227-240
In April 1995, the US Geological Survey began a study to determine the occurrence and temporal distribution of 49 pesticides and pesticide metabolites in air and rain samples from an urban and an agricultural sampling site in Mississippi. The study was a joint effort between the National Water-Quality Assessment and...
Occurrence and distribution of microbiological indicators in groundwater and stream water
Donna S. Francy, Dennis R. Helsel, Rebecca A. Nally
2000, Water Environment Research (72) 152-161
A total of 136 stream water and 143 groundwater samples collected in five important hydrologic systems of the United States were analyzed for microbiological indicators to test monitoring concepts in a nationally consistent program. Total coliforms were found in 99%, Escherichia coli in 97%, and Clostridium perfringens in 73% of stream water samples analyzed...
Influences of dietary uptake and reactive sulfides on metal bioavailability from aquatic sediments
B.-G. Lee, Sarah B. Griscom, H.J. Choi, C.-H. Koh, James A. Luoma, Nicholas S. Fisher
2000, Science (287) 282-284
Understanding how animals are exposed to the large repository of metal pollutants in aquatic sediments is complicated and is important in regulatory decisions. Experiments with four types of invertebrates showed that feeding behavior and dietary uptake control bioaccumulation of cadmium, silver, nickel, and zinc. Metal concentrations in animal tissue correlated...
Statistical and procedural issues in the use of heated taxidermic mounts
G.S. Bakken, K.P. Kenow, C. E. Korschgen, A.F. Boysen
2000, Journal of Thermal Biology (25) 317-321
Studies using mounts have an inherently nested error structure; calibration and standardization should use the appropriate procedures and statistics. One example is that individual mount differences are nested within morphological factors related to species, age, or gender; without replication, mount differences may be confused with differences due to morphology. Also,...
Trace elements, organochlorines, polycyclic aromatic hydrocarbons, dioxins, and furans in lesser scaup wintering on the Indiana Harbor Canal
T. W. Custer, Christine M. Custer, R. K. Hines, D. W. Sparks
2000, Environmental Pollution (110) 469-482
During the winter of 1993a??94, male lesser scaup (Aythya affinis) were collected on the heavily polluted Indiana Harbor Canal (IHC), East Chicago, IN, USA, and examined for tissue contaminant levels. Lesser scaup collected on the IHC had higher concentrations of cadmium (Cd), mercury (Hg), selenium (Se), polychlorinated biphenyls (PCBs), selected...
Effects of whole sediments from Corpus Christi Bay on survival, growth, and reproduction of the mysid, Americamysis bahia (formerly Mysidopsis bahia)
G.M. Cripe, R.S. Carr, S.S. Foss, P.S. Harris, R. S. Stanley
2000, Bulletin of Environmental Contamination and Toxicology (64) 426-433
[No abstract available]...
Distribution and relative abundance of the crayfishes Procambarus alleni (Faxon) and P. fallax (Hagen) in southern Florida
A.N. Hendrix, W.F. Loftus
2000, Wetlands (20) 194-199
The Everglades crayfish (Procambarus alleni Faxon) is the only species reported from Everglades National Park (ENP) and Big Cypress National Preserve (BICY). However, we identified a second species, Procambarus fallax (Hagen), from those locations. Reexamination of archived samples showed that P. fallax had been collected as early as 1985 but...
Effect of temperature on photosynthesis-light response and growth of four phytoplankton species isolated from a tidal freshwater river
J.F. Coles, R.C. Jones
2000, Journal of Phycology (36) 7-16
Three cyanobacteria (Microcystis aeruginosa Kutz. emend. Elenkin, Merismopedia tenuissima Lemmermann, and Oscillatoria sp.) and one diatom (Aulacoseira granulata var. angustissima O. Mull. emend. Simonsen) were isolated from the tidal freshwater Potomac River and maintained at 23??C and 40 ??mol photons??m-2??s-1 on a 16:8 L:D cycle in unialgal culture. Photosynthetic parameters...
A new method for collection of nitrate from fresh water and the analysis of nitrogen and oxygen isotope ratios
S. R. Silva, C. Kendall, D.H. Wilkison, A.C. Ziegler, Cecily C.Y. Chang, R.J. Avanzino
2000, Journal of Hydrology (228) 22-36
A new method for concentrating nitrate from fresh waters for δ15N and δ18O analysis has been developed and field-tested for four years. The benefits of the method are: (1) elimination of the need to transport large volumes of water to the laboratory for processing; (2) elimination of the need for hazardous preservatives; and (3) the...
Bioavailability of sediment-associated mercury to Hexagenia mayflies in a contaminated floodplain river
T.J. Naimo, J.G. Wiener, W.G. Cope, N.S. Bloom
2000, Canadian Journal of Fisheries and Aquatic Sciences (57) 1092-1102
We examined the bioavailability of mercury in sediments from the contaminated Sudbury River (Massachusetts, U.S.A.). Mayfly nymphs (Hexagenia) were exposed in four 21-day bioaccumulation tests to contaminated and reference sediments (treatments) from reservoirs, flowing reaches, palustrine wetlands, and a riverine lake. Mean total mercury (Sigma Hg) ranged from 880 to...
North-south geological differences between the residual polar caps on Mars
P.C. Thomas, M. C. Malin, K.S. Edgett, M. H. Carr, W.K. Hartmann, A.P. Ingersoll, P.B. James, L.A. Soderblom, J. Veverka, R. Sullivan
2000, Nature (404) 161-164
Polar processes can be sensitive indicators of global climate, and the geological features associated with polar ice caps can therefore indicate evolution of climate with time. The polar regions on Mars have distinctive morphologic and climatologic features: thick layered deposits, seasonal CO2 frost caps extending to mid latitudes, and near-polar...
Herbicides and herbicide degradates in shallow groundwater and the Cedar River near a municipal well field, Cedar Rapids, Iowa
R.A. Boyd
2000, Conference Paper, Science of the Total Environment
Water samples were collected near a Cedar Rapids, Iowa municipal well field from June 1998 to August 1998 and analyzed for selected triazine and acetanilide herbicides and degradates. The purpose of the study was to evaluate the occurrence of herbicides and herbicide degradates in the well field during a period...
A test of a climatic index of dune mobility using measurements from the southwestern United States
N. Lancaster, P. Helm
2000, Earth Surface Processes and Landforms (25) 197-207
The climatic index of dune mobility developed by Lancaster (1988) has been applied to a variety of different environments. The index is, however, untested and unverified. We tested the index by comparison of values of the dune mobility index calculated from climate data with rates of sand transport measured at...
Physiological development and migratory behavior of subyearling fall chinook salmon in the Columbia River
K.F. Tiffan, D.W. Rondorf, P.G. Wagner
2000, North American Journal of Fisheries Management (20) 28-40
We describe the migratory behavior and physiological development of subyearling fall chinook salmon Oncorhynchus tshawytscha migrating through John Day Reservoir on the Columbia River, Washington and Oregon. Fish were freeze-branded and coded-wire-tagged at McNary Dam, Oregon, from 1991 to 1994, to determine travel time to John Day Dam and subsequent...
Geophysical evidence for the evolution of the California Inner Continental Borderland as a metamorphic core complex
Uri S. ten Brink, Jie Zhang, Thomas M. Brocher, David A. Okaya, Kim D. Klitgord, Gary S. Fuis
2000, Journal of Geophysical Research B: Solid Earth (105) 5835-5857
We use new seismic and gravity data collected during the 1994 Los Angeles Region Seismic Experiment (LARSE) to discuss the origin of the California Inner Continental Borderland (ICB) as an extended terrain possibly in a metamorphic core complex mode. The data provide detailed crustal structure of the Borderland and its...
Trapping and migration of methane associated with the gas hydrate stability zone at the Blake Ridge Diapir: New insights from seismic data
M.H. Taylor, William P. Dillon, I.A. Pecher
2000, Conference Paper, Marine Geology
The Blake Ridge Diapir is the southernmost of a line of salt diapirs along the Carolina trough. Diapirs cause faulting of the superjacent sediments, creating pathways for migration of fluids and gas to the seafloor. We analyzed reflection seismic data from the Blake Ridge Diapir, which is located in a...
Richness and diversity of helminth communities in tropical freshwater fishes: Empirical evidence
A. Choudhury, T.A. Dick
2000, Journal of Biogeography (27) 935-956
Aim: Published information on the richness and diversity of helminth parasite communities in tropical freshwater fishes is reviewed in response to expectations of species-rich parasite communities in tropical regions. Location: Areas covered include the tropics and some subtropical areas. In addition, the north temperate area of the nearctic zone is...
Climatic and biotic controls on annual carbon storage in Amazonian ecosystems
H. Tian, J. M. Melillo, D. W. Kicklighter, A. D. McGuire, J. Helfrich Iii, B. Moore III, C. J. Vorosmarty
2000, Global Ecology and Biogeography (9) 315-335
1 The role of undisturbed tropical land ecosystems in the global carbon budget is not well understood. It has been suggested that inter-annual climate variability can affect the capacity of these ecosystems to store carbon in the short term. In this paper, we use a transient version of the Terrestrial...
Results of the Imager for Mars Pathfinder windsock experiment
Robert Sullivan, Ronald Greeley, Michael Kraft, Gregory Wilson, Matthew P. Golombek, Kenneth E. Herkenhoff, James Murphy, Peter Smith
2000, Journal of Geophysical Research E: Planets (105) 24547-24562
The Imager for Mars Pathfinder (IMP) windsock experiment measured wind speeds at three heights within 1.2 m of the Martian surface during Pathfinder landed operations. These wind data allowed direct measurement of near-surface wind profiles on Mars for the first time, including determination of aerodynamic roughness length and wind friction...
Influence of a nonionic surfactant (Triton X-100) on contaminant distribution between water and several soil solids
J.-F. Lee, P.-M. Liao, C.-C. Kuo, H.-T. Yang, C. T. Chiou
2000, Journal of Colloid and Interface Science (229) 445-452
The influence of a nonionic surfactant (Triton X-100) on the contaminant distribution coefficients in solid–water mixtures was determined for a number of relatively nonpolar compounds (contaminants) on several natural solids. The studied compounds consisted of BTEX (benzene, toluene, ethylbenzene, and p-xylene) and chlorinated pesticides...
