Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10363
Pesticides in near-surface aquifers: An assessment using highly sensitive analytical methods and tritium Pesticides in near-surface aquifers: An assessment using highly sensitive analytical methods and tritium
In 1992, the U.S. Geological Survey (USGS) determined the distribution of pesticides in near-surface aquifers of the midwestern USA to be much more widespread than originally determined during a 1991 USGS study. The frequency of pesticide detection increased from 28.4% during the 1991 study to 59.0% during the 1992 study. This increase in pesticide detection was primarily the result of a...
Authors
D.W. Kolpin, D. A. Goolsby, E.M. Thurman
Difference in the crab fauna of mangrove areas at a southwest Florida and a northeast Australia location: Implications for leaf litter processing Difference in the crab fauna of mangrove areas at a southwest Florida and a northeast Australia location: Implications for leaf litter processing
Existing paradigms suggest that mangrove leaf litter is processed primarily via the detrital pathway in forests in the Caribbean biogeographic realm whereas herbivorous crabs are relatively more important litter processors in the Indo-West Pacific. To test this hypothesis, we used pitfall traps to collect intertidal crabs to characterize the crab fauna in a mangrove estuary in southwest...
Authors
C.C. McIvor, T. J. Smith
Gonadal steroidogenesis in-vitro from juvenile alligators obtained from contaminated or control lakes Gonadal steroidogenesis in-vitro from juvenile alligators obtained from contaminated or control lakes
The ubiquitous distribution of many contaminants and the nonlethal, multigenerational effects of such contaminants on reproductive, endocrine, and immune systems have led to concerns that wildlife worldwide are affected. Although the causal agents and effects are known for some species, the underlying physiological mechanisms associated with contaminant-induced reproductive modifications...
Authors
Louis J. Guillette, Timothy S. Gross, D. A. Gross, A. A. Rooney, H. Franklin Percival
An automated photo-identification catalog for studies of the life history of the Florida manatee An automated photo-identification catalog for studies of the life history of the Florida manatee
Abstract not supplied at this time
Authors
C.A. Beck, J.P. Reid
Estimating shallow subsidence in microtidal salt marshes of the southeastern United States: Kaye and Barghoorn revisited Estimating shallow subsidence in microtidal salt marshes of the southeastern United States: Kaye and Barghoorn revisited
Simultaneous measurements of vertical accretion and change in surface elevation relative to a shallow (3-5 m) subsurface datum were made in selected coastal salt marshes of Louisiana, Florida, and North Carolina to quantitatively test Kaye and Barghoorn's contention that vertical accretion is not a good surrogate for surface elevation change because of autocompaction of the substrate...
Authors
Donald R. Cahoon, D.J. Reed, J.W. Day
Waterborne recreation and the Florida manatee Waterborne recreation and the Florida manatee
Abstract not supplied at this time
Authors
T. J. O'Shea
Behavioral research on captive endangered fishes of North America Behavioral research on captive endangered fishes of North America
Abstract not supplied at this time
Authors
F. Francis-Floyd, J.D. Williams
Florida manatees Florida manatees
The endangered Florida manatee (Trichechus manatus latirostris) is a survivor. It is one of only three living species of manatees which, along with their closest living relative, the dugong (Dugong dugon), make up the Order Sirenia. This taxonomic distinctiveness reflects their evolutionary and genetic uniqueness. Sirenians are the only herbivorous marine mammals; manatees feed on...
Authors
Lynn W. Lefebvre, Thomas J. O’Shea
Caranigidae. Vertebrados - Part 1 Caranigidae. Vertebrados - Part 1
Abstract not supplied at this time
Authors
W. F. Smith-Vaniz
Reproduction and distribution of bald eagles in Voyageurs National Park, Minnesota, 1973-1993 Reproduction and distribution of bald eagles in Voyageurs National Park, Minnesota, 1973-1993
The bald eagle (Haliaeetus leucocephalus) is classified as a threatened species in Minnesota. In 1973, the National Park Service began monitoring the distribution and reproduction of bald eagles in and immediately adjacent to Voyageurs National Park to obtain data that park management could use to protect bald eagles from the effects of use of the park by visitors and from the expansion...
Authors
Leland H. Grim, Larry W. Kallemeyn
Water resources data Texas, water year 1994, volume 3. Colorado River basin, Lavaca River basin, Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins Water resources data Texas, water year 1994, volume 3. Colorado River basin, Lavaca River basin, Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins
No abstract available.
Authors
S. C. Gandara, W.J. Gibbons, F.L. Andrews, J.C. Fisher, B.A. Hinds, R. E. Jones
Water resources data Texas, water year 1994, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, Trinity River Basin, and intervening coastal basins Water resources data Texas, water year 1994, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, Trinity River Basin, and intervening coastal basins
No abstract available.
Authors
S. C. Gandara, W.J. Gibbons, F.L. Andrews, J.C. Fisher, B.A. Hinds, R. E. Jones