Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10367
Status of fish communities in the Rio Grande, Big Bend National Park, Texas - comparison before and after Spring 2003 period of low flow Status of fish communities in the Rio Grande, Big Bend National Park, Texas - comparison before and after Spring 2003 period of low flow
During 2003–04 the U.S. Geological Survey, in cooperation with the National Park Service, re-evaluated the status of fish communities in three reaches of the Rio Grande in Big Bend National Park that originally were evaluated when the three reaches were established for study in 1999. The objective was to determine whether there were measurable differences between 1999 and 2003–04...
Authors
J. Bruce Moring
Population manipulations Population manipulations
Abstract not supplied at this time
Authors
C.K. Dodd
Assessing contaminant sensitivity of endangered and threatened aquatic species: Part I. Acute toxicity of five chemicals Assessing contaminant sensitivity of endangered and threatened aquatic species: Part I. Acute toxicity of five chemicals
Assessment of contaminant impacts to federally identified endangered, threatened and candidate, and state-identified endangered species (collectively referred to as "listed" species) requires understanding of a species' sensitivities to particular chemicals. The most direct approach would be to determine the sensitivity of a listed species to a particular contaminant or perturbation. An...
Authors
F.J. Dwyer, F.L. Mayer, L.C. Sappington, D.R. Buckler, C.M. Bridges, I.E. Greer, D.K. Hardesty, C.E. Henke, C.G. Ingersoll, J.L. Kunz, D.W. Whites, T. Augspurger, D.R. Mount, K. Hattala, G.N. Neuderfer
Woody debris in the mangrove forests of South Florida Woody debris in the mangrove forests of South Florida
Woody debris is abundant in hurricane‐impacted forests. With a major hurricane affecting South Florida mangroves approximately every 20 yr, carbon storage and nutrient retention may be influenced greatly by woody debris dynamics. In addition, woody debris can influence seedling regeneration in mangrove swamps by trapping propagules and enhancing seedling growth potential. Here, we report...
Authors
K. W. Krauss, T.W. Doyle, R.R. Twilley, T. J. Smith, K.R.T. Whelan, J.K. Sullivan
Can diet-dependent factors help explain fish-to-fish variation in thiamine-dependent early mortality syndrome? Can diet-dependent factors help explain fish-to-fish variation in thiamine-dependent early mortality syndrome?
To provide insight into the reasons why offspring of certain salmonine females exhibit early mortality syndrome (EMS) in the Great Lakes whereas others do not, we measured the egg concentrations of potential biochemical markers (stable isotopes of nitrogen and carbon, fatty acid signatures, and lipid-soluble carotenoids and vitamins) that are indicative of differing food web and trophic...
Authors
S.B. Brown, M.T. Arts, L. R. Brown, M. Brown, K. Moore, M. Villella, J.D. Fitzsimons, D. C. Honeyfield, D. E. Tillitt, J.L. Zajicek, M. Wolgamood, J.G. Hnath
Herbicides and degradates in shallow aquifers of Illinois: Spatial and temporal trends Herbicides and degradates in shallow aquifers of Illinois: Spatial and temporal trends
During the fall of 2000, the occurrence was examined of 16 herbicides and 13 herbicide degradates in samples from 55 wells in shallow aquifers underlying grain producing regions of Illinois. Herbicide compounds with concentrations above 0.05 μg/L were detected in 56 percent of the samples. No concentrations exceeded regulatory drinking water standards. The six most frequently detected...
Authors
P. C. Mills, D.W. Kolpin, E.A. Scribner, E.M. Thurman
Chronic boat strike and polycyctic kidneys in a free-ranging Florida manatee (Trichechus manatus latirostris) Chronic boat strike and polycyctic kidneys in a free-ranging Florida manatee (Trichechus manatus latirostris)
No abstract available.
Authors
Renee Rember, K. Harr, Pamela E. Ginn, Jessica Lightsey, M. Keller, R. Bonde, J. Reid
Surficial geologic tools in fluvial geomorphology: chapter 2 Surficial geologic tools in fluvial geomorphology: chapter 2
No abstract available.
Authors
Robert B. Jacobson, James E. O'Connor, Takashi Oguchi
Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae
Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged
Authors
Steven J. Hamilton, Kathy M. Holley, Kevin J. Buhl, Fern A. Bullard
Assessing contaminant sensitivity of endangered and threatened aquatic species: Part III. Effluent toxicity tests Assessing contaminant sensitivity of endangered and threatened aquatic species: Part III. Effluent toxicity tests
Toxicity tests using standard effluent test procedures described by the U.S. Environmental Protection Agency were conducted with Ceriodaphnia dubia, fathead minnows (Pimephales promelas), and seven threatened and endangered (listed) fish species from four families: (1) Acipenseridae: shortnose sturgeon (Acipenser brevirostrum); (2) Catostomidae; razorback sucker (Xyrauchen texanus); (3)...
Authors
F.J. Dwyer, D.K. Hardesty, C.E. Henke, C.G. Ingersoll, D.W. Whites, T. Augspurger, T.J. Canfield, D.R. Mount, F.L. Mayer
Rejoinder to "The performance of mixture models in heterogeneous closed population capture-recapture" Rejoinder to "The performance of mixture models in heterogeneous closed population capture-recapture"
No abstract available.
Authors
Robert Dorazio, J. Andrew Royle
Water resources data, North Carolina, water year 2004. Volume 2: Ground-water records Water resources data, North Carolina, water year 2004. Volume 2: Ground-water records
Water-resources data for the 2004 water year for North Carolina consist of records of stage, discharge, water quality for streams; stage and contents for lakes and reservoirs; precipitation; and ground-water levels and water quality of ground water. Volume 1 contains discharge records for 217 gaging stations; stage and contents for 58 lakes and reservoirs; stage only records for 22...
Authors
S. S. Howe, P.L. Breton, M. J. Chapman