Indexing the relative abundance of age-0 white sturgeons in an impoundment of the lower Columbia River from highly skewed trawling data
T.D. Counihan, Allen I. Miller, M.J. Parsley
1999, North American Journal of Fisheries Management (19) 520-529
The development of recruitment monitoring programs for age-0 white sturgeons Acipenser transmontanus is complicated by the statistical properties of catch-per-unit-effort (CPUE) data. We found that age-0 CPUE distributions from bottom trawl surveys violated assumptions of statistical procedures based on normal probability theory. Further, no single data transformation uniformly satisfied these...
Changes in 14C activity over time during vacuum distillation of carbon from rock pore water
G. R. Davidson, I.C. Yang
1999, Radiocarbon (41) 141-148
The radiocarbon activity of carbon collected by vacuum distillation from a single partially saturated tuff began to decline after approximately 60% of the water and carbon had been extracted. Disproportionate changes in 14C activity and δ13C during distillation rule out simple isotopic fractionation as a causative explanation. Additional phenomena...
The effect of migration distance and timing on metabolic enzyme activity in an anadromous clupeid, the American shad (Alosa sapidissima)
J. B. K. Leonard, S. D. McCormick
1999, Fish Physiology and Biochemistry (20) 163-179
The American shad (Alosa sapidissima) is a common anadromous fish species with ecological and economic importance on the east coast of North America. This iteroparous species undergoes an energetically costly upriver spawning migration in spring. To evaluate metabolic changes associated with this migration, we assessed the maximum activity of five...
Changes in haematology during upstream migration to American shad
J. B. K. Leonard, S. D. McCormick
1999, Journal of Fish Biology (54) 1218-1230
Heart mass of American shad Alosa sapidissima did not change during migration in the Connecticut River. Spleen mass decreased and there was an increase in available blood haemoglobin (+22%) and haematocrit (+9%). The decreases in spleen somatic index (-29%) and spleen haemoglobin content (-15%) were dependent upon distance travelled upriver and not...
Water-use patterns of woody species in pineland and hammock communities of South Florida
S.M.L. Ewe, Leonel da Silveira Lobo Sternberg, L. Sternberg, D.E. Busch
1999, Forest Ecology and Management (118) 139-148
Rockland pine forests of south Florida dominated by Pinus elliottii var. densa characteristically have poor soil development in relation to neighboring hardwood hammocks. This has led to the hypothesis that Everglades hammock trees are more reliant on soil moisture derived from local precipitation whereas pineland plants must depend more on...
Responsiveness of gill Na+/K+-ATPase to cortisol is related to gill corticosteroid receptor concentrations in juvenile rainbow trout
J. M. Shrimpton, S. D. McCormick
1999, Journal of Experimental Biology (202) 987-995
A positive relationship between receptor concentration and tissue responsiveness is an often-assumed and rarely tested principle in endocrinology. In salmonids, seasonal changes in levels of plasma cortisol and gill corticosteroid receptors (CRs) during the spring indicate a potential role for this hormone in the parr–smolt transformation. It is not known...
Sperm-cell ultrastructure of North American sturgeons II: The shortnose sturgeon (Acipenser brevirostrum, Lesueur, 1818)
M. N. DiLauro, W.S. Kaboord, R.A. Walsch
1999, Canadian Journal of Zoology (77) 321-330
The fine structure of the sperm cell of the shortnose sturgeon (Acipenser brevirostrum) was examined using transmission electron microscopy and selected metrics. The cell possesses a distinct acrosome, a defined head region, a midpiece, and a single flagellum. The mean length of the sperm cell body (acrosome + nucleus +...
Determination of pesticides associated with suspended sediments in the San Joaquin River, California, USA, using gas chromatography-ion trap mass spectrometry
B.A. Bergamaschi, D.S. Baston, K.L. Crepeau, K.M. Kuivila
1999, Toxicological and Environmental Chemistry (69) 305-319
An analytical method useful for the quantification of a range of pesticides and pesticide degradation products associated with suspended sediments was developed by testing a variety of extraction and cleanup schemes. The final extraction and cleanup methods chosen for use are suitable for the quantification of the listed pesticides using...
Environmental geology: Our professional public responsibility
L. C. Gerhard, L. L. Brady
1999, Environmental Geology (37) 1-8
Conflicts between different interest groups for use of natural resources is one area where state geological surveys can provide assistance. A state geological survey working within the scientific constraints of specific issues can remain objective in its presentations and maintain the faith of both the conflicting interest groups and the...
Stripping columns remove carbon dioxide from recirc systems
S.T. Summerfelt, B.J. Vinci, M.B. Timmons, B.J. Watten
1999, Recirc Today (1) 24-26
Airborne detection of diffuse carbon dioxide emissions at Mammoth Mountain, California
T.M. Gerlach, M.P. Doukas, K.A. McGee, R. Kessler
1999, Geophysical Research Letters (26) 3661-3664
We report the first airborne detection of CO2 degassing from diffuse volcanic sources. Airborne measurement of diffuse CO2 degassing offers a rapid alternative for monitoring CO2 emission rates at Mammoth Mountain. CO2 concentrations, temperatures, and barometric pressures were measured at ~2,500 GPS-referenced locations during a one-hour, eleven-orbit survey of air...
Constraints on the sedimentation history of San Francisco Bay from 14C and 10Be
A. VanGeen, N. J. Valette-Silver, S. N. Luoma, C. C. Fuller, M. Baskaran, F. Tera, J. Klein
1999, Marine Chemistry (64) 29-38
Industrialization and urbanization around San Francisco Bay as well as mining and agriculture in the watersheds of the Sacramento and San Joaquin rivers have profoundly modified sedimentation patterns throughout the estuary. We provide some constraints on the onset of these erosional disturbances with 10Be data for three sediment cores: two...
A review of early mortality syndrome (EMS) Great Lakes salmonids: relationship with thiamine deficiency
J.D. Fitzsimons, S.B. Brown, D. C. Honeyfield, J.G. Hnath
1999, Ambio (28) 9-15
Modeling impact of storage zones on stream dissolved oxygen
S.C. Chapra, R.L. Runkel
1999, Journal of Environmental Engineering (125) 415-419
The Streeter-Phelps dissolved oxygen model is modified to incorporate storage zones. A dimensionless number reflecting enhanced decomposition caused by the increased residence time of the biochemical oxygen demand in the storage zone parameterizes the impact. This result provides a partial explanation for the high decomposition rates observed in shallow streams....
Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
1999, Keystone Surveyor 6-7
Altitude of the top of the Minnekahta Limestone in the Black Hills area, South Dakota
Janet M. Carter, Jack A. Redden
1999, Hydrologic Atlas 744-B
This map is a product of the Black Hills Hydrology Study, which was initiated in 1990 to assess the quantity, quality, and distribution of surface water and groundwater in the Black Hills area of South Dakota (Driscoli, 1992). This long-term study is a cooperative effort between the U.S. Geological Survey...
Specimen shipment
J. C. Franson
1999, Information and Technology Report 1999-0001
Procedures for shipping specimens vary with different disease diagnostic laboratories. Therefore, it is important to contact the receiving laboratory and obtain specific shipping instructions. This will facilitate processing of specimens when they reach the laboratory and assure that the quality of specimens is not compromised. Time spent on field investigation,...
Management of riparian habitat for mammals, birds, reptiles, and amphibians. Appendix C
M. G. Knutson, C. Ribic
William Hohman, editor(s)
1999, Report, NRCS Management and Restoration of Midwestern Riparian Systems Workshop Report
Melinda Knutson (USGS Upper Midwest Environmental Sciences Center) and Christine Ribic (USGS Wisconsin Cooperative Wildlife Research Unit) contributed to a recent report published by the USDA Natural Resources Conservation Service. The report summarizes a workshop held 8 December 1999 in Chicago, IL. Highlights of the report include resources and land management...
Mass stranding of wedge-tailed shearwater chicks in Hawaii
Thierry M. Work, Robert Rameyer
1999, Journal of Wildlife Diseases (35) 487-495
Unusual numbers of wedge-tailed shearwater (Puffinus pacificus) chicks stranded on Oahu (Hawaii, USA) in 1994. Compared to healthy wedge-tailed shearwater (WTSW) chicks, stranded chicks were underweight, dehydrated, leukopenic, lymphopenic, eosinopenic, and heterophilic; some birds were toxemic and septic. Stranded chicks also were hypoglycemic and had elevated aspartate amino transferase levels....
Altitude of the top of the Deadwood Formation in the Black Hills area, South Dakota
Janet M. Carter, Jack A. Redden
1999, Hydrologic Atlas 744-E
This map is a product of the Black Hills Hydrology Study, which was initiated in 1990 to assess the quantity, quality, and distribution of surface water and ground water in the Black Hills area of South Dakota (Driscoll, 1992). This long-term study is a cooperative effort between the U.S. Geological...
Movement, distribution, and behavior of radio-tagged yearling spring Chinook salmon and hatchery steelhead in the forebay of Bonneville Dam, 1999
J.M. Plumb, K.S. Gates, M.S. Novick, B.D. Liedtke, N.S. Adams
1999, Report
Abstract not available...
Feasibility of extracting survival information from radio-telemetry studies at the John Day Dam
T.D. Counihan, J.H. Petersen, N.S. Adams, R.S. Shively, H.C. Hansel
1999, Report
Abstract not available ...
Predicting the effects of dam breaching in the lower Snake River on predators of juvenile salmon
J. Petersen, C. Barfoot, S. Sauter, D. Gadomski, P. Connolly
1999, Report
Abstract not available ...
Willamette River ecological health studies. In situ bioassay analysis
R. Kocan, P. Hershberger
1999, Journal of Parasitology (96) 348-352
Abstract not available ...
Effects of mitigative measures on productivity of white sturgeon populations in the Columbia River downstream from McNary Dam, and status and habitat requirements of white sturgeon populations in the Columbia and Snake rivers upstream from McNary Dam
T.D. Counihan, M.J. Parsley, D. Gallion, C.N. Frost, M.N. Morgan
1999, Report
Abstract not available ...
