M. G. Knutson
1990, Thesis
Abstract not submitted to date...
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Page 4077, results 101901 - 101925
Publication Extents
Not all publications have extents, not all extents are completely accurateB.E. Kus
1990, Conference Paper
No abstract available at this time...
Harvey E. Jobson, Edmund D. Andrews
Chang Howard H.Hill Joseph C., editor(s)
1990, Conference Paper, Hydraulic Engineering - Proceedings of the 1990 National Conference
Historically, sediment information has been used primarily in planning for engineering structures that were designed to meet a single or a very limited number of objectives. Today most water-resource systems are fully developed, but society is asking that the existing systems be operated to meet multiple objectives, which often were...
R.A. Bergstedt, David R. Anderson
1990, Transactions of the American Fisheries Society (119) 86-91
We used underwater video in conjunction with the line transect method and a Fourier series estimator to make 13 independent estimates of the density of known populations of bricks lying on the bottom in shallows of Lake Huron. The pooled estimate of density (95.5 bricks per hectare) was close to...
Rachel M. Barker
1990, Report
Robert I. Tilling, Lyn J. Topinka, Donald A. Swanson
1990, Report
Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Geologists call Mount St....
G. E. Ferguson (compiler)
1990, Report
This volume is the fifth in a series of chronological summaries of the activities and achievements of the Water Resources Division of the U.S. Geological Survey, but it is the first to be published as a public document. As explained in the Preface which follows, the first volume was published...
Barnaby J. Watten
1990, Aquacultural Engineering (9) 305-328
Successful application of the packed column in fish culture requires a design based not only on oxygen supplementation rates (kg/day), or other standard performance indicators such as oxygen absorption efficiency (kg absorbed/kg applied) or transfer efficiency (kg/kWh), bvt also on dissolved nitrogen and total dissolved gas pressure limits and predicted...
David M. Mauser, Tonie E. Rocke, John G. Mensik, Christopher J. Brand
1990, California Fish and Game (76) 132-136
Blood samples were taken from 181 (108 adult drakes and 73 individuals of mixed age and sex) mallards, Anas platyrhynchos, from Colusa and Delevan National Wildlife Refuges during late winter and summer of 1987. The percentage of birds with elevated lead concentration was 28.7 for late winter and 16.4 for...
L. Sileo, P.R. Sievert, M.D. Samuel
1990, Journal of Wildlife Diseases (26) 329-338
As part of an investigation of the effect of plastic ingestion on seabirds in Hawaii, we necropsied the carcasses of 137 Laysan albatross (Diomedea immutabilis) chicks from Midway Atoll in the Pacific Ocean during the summer of 1987. Selected tissues were collected for microbiological, parasitological, toxicological or histopathological examinations. Dehydration...
H.A. Kantrud
1990, General Technical Report RM-194
No abstract available....
H. A. Poston, R.C. Williams
1990, Progressive Fish-Culturist (52) 36-40
We conducted several seasonal aquarium experiments to determine survival and body chemistry changes of Atlantic salmon (Salmo salar) after 24‐h exposures to salinities of 0, 16.5, 33, and 40‰ at 10°C. Fish transferred directly to test aquaria from an ozonated, 100‰ closed water‐reuse system at 18°C were compared with fish...
M. G. Knutson
1990, Great Lakes Research Consortium Report (4) 5-8
Abstract not submitted to date...
D. P. Anderson
1990, Transactions of the American Fisheries Society (119) 564-565
Review of: Systemic Pathology of Fish: A Text and Atlas of Comparative Tissue Responses in Diseases of Teleosts. By Hugh W. Ferguson. Iowa State University Press, Ames. 1989. 263 pages. $54.95....
W. B. Schill, R.M. Dorazio
1990, Transactions of the American Fisheries Society (119) 77-85
Stocks of Atlantic striped bass Morone saxatilis that were assumed to be geographically isolated during spawning showed strong antigenic differences in blood serum albumin. A discriminant function was estimated from the immunologic responses of northern (Canadian and Hudson River) and southern (Chesapeake Bay and Roanoke River) stocks to two reference antisera. The...
Roger L. Reep, Thomas J. O’Shea
1990, Brain, Behavior and Evolution (35) 185-194
Neuroanatomical structure was examined in the brains of West Indian manatees (Trichechus manatus) using computer-based morphometric methods. Although manatees have a small relative brain size, volume estimates of the major brain regions indicate that the telencephalon comprises 71% of totalbrain volume and is 90% cerebral cortex. These values are comparable to those...
Barnaby J. Watten, J. W. Meade, Claude E. Boyd
1990, Aquacultural Engineering (9) 97-120
A numerical model was used to evaluate the performance of a surface agitation system designed to contact commercial oxygen with water. The modeled system was unique in that oxygen-rich off-gas, normally discharged to the atmosphere, was directed in serial reuse through additional contact stages receiving untreated water. A correlation between...
Barnaby J. Watten, Claude E. Boyd
1990, Aquacultural Engineering (9) 33-59
A packed column oxygen obsorber was developed in which oxygen flow is directed, in serial reuse, through parallel packed column stages receiving equal portions of the liquid being treated. The relative performance of the absorber was established using a computer simulation program employing finite difference-mass transfer calculations. The program was...
M.D. Samuel
1990, Wildlife Society Bulletin (18) 360-360
Computers and computer software have become an integral part of the practice of wildlife science. Computers now play an important role in teaching, research, and management applications. Because of the specialized nature of wildlife problems, specific computer software is usually required to address a given problem (e.g., home range analysis)....
S. G. Hughes
1990, Aquaculture (90) 173-178
A study was conducted to determine the value of triticale (a hybrid between rye and wheat) as a substitute for wheat middlings in the diet of Atlantic salmon (Salmo salar). Data on growth and carcass composition of fish fed the experimental diets containing triticale were comparable to those of fish...
T. J. O'Shea, R.L. Reep
1990, Journal of Mammalogy (71) 534-543
Relative brain size in the Sirenia is unusually small. Encephalization quotients are 0.27 for Florida manatees (Trichechus manatus) and 0.38 for dugongs (Dugong dugon). Estimates for Steller's sea cow (Hydrodamalis gigas) range from 0.12 to 0.19. These values are among the lowest known for Recent mammals, and seemingly have changed...
L.G. Nico
1990, Environmental Biology of Fishes (29) 51-57
During the 1988 rainy season, I studied the 24 h feeding chronology of juvenile (40–68 mm standard length) piranhas, Pygocentrus notatus (Characidae: Serrasalminae) from a natural population inhabiting a small savanna stream in Apure State, Venezuela. Stomach contents analyses, supported by laboratory determinations of digestion rate, showed that these fish...
J.E. Bodammer, D. P. Anderson, O. W. Dixon
1990, Journal of Aquatic Animal Health (2) 182-193
The spleen and head kidney of striped bass Morone saxatilis were examined by electron microscopy, including examination of ultrastructural localization of peroxidase. The spleen is composed of a loosely organized reticulum that supports the red and white pulp. The principal hematopoietic and mature blood cells observed were erythrocytes,...
J.E. Thomerson, D.C. Taphorn, L.G. Nico
1990, BioLlania (7) 33-38
Abstract not supplied at this time...
D. R. Smith, S. Niemeyer, J. A. Estes, A.R. Flegal
1990, Environmental Science & Technology (24) 1517-1521
No abstract available....