Variation in response of channel catfish to Henneguya sp. infections (Protozoa: Myxosporidea)
J. P. McCraren, M.L. Landolt, G. L. Hoffman, F. P. Meyer
1975, Journal of Wildlife Diseases (11) 2-7
Infections in channel catfish (Ictalurus punctatus, Rafinesque) induced by the sporozoan Henneguya (Protozoa: Myxosporidea) result in seven known and diverse disease manifestations. Most outstanding is an interlamellar branchial form responsible for significant losses among immature catfish, and a unique papillomatous form. The question of whether or not the species of Henneguya involved in these...
Survival of wood duck and mallard broods in north-central Minnesota
I.J. Ball, D.S. Gilmer, L.M. Cowardin, J. H. Riechmann
1975, Journal of Wildlife Management (39) 776-780
Duckling survival in wood duck (Aix sponsa) and mallard (Anas platyrhynchos) broods was estimated from data obtained from 71 radio-marked brood hens on a study area in north-central Minnesota. Radio-marked hens produced 30 broods during the study, and 41 hens already leading broods were captured and radio-marked. Production estimates based...
Dieldrin in the diet of channel catfish (Ictalurus punctatus): uptake and effect on growth
Ray L. Argyle, George C. Williams, Clara B. Daniel
1975, Journal of the Fisheries Research Board of Canada (32) 2197-2204
Fingerling channel catfish (Ictalurus punctatus) were given diets containing 0, 0.4, 0.8, or 4.0 I?g dieldrin/g of food (dry weight) for 210 days, followed by a dieldrin-free diet for 56 days. Catfish receiving 4.0 I?g dieldrin/g food gained about 17% less weight than the control fish in 210 days and...
Annual contribution of carbon, nitrogen, and phosphorus by migrant Canada geese to a hardwater lake
Bruce A. Manny, Robert G. Wetzel, W.C. Johnson
1975, International Association of Theoretical and Applied Limnology (19) 949-951
Each year more than 6,000 migrant Canada geese (Branta canadensis interior Todd) rest for 3 to 10 days during the months of March, October, November, and December on Wintergreen Lake, a productive 15 ha (33 acre) hardwater lake in the W. K. Kellogg Bird Sanctuary of Michigan State University in...
Leech (Hirudinea) infestations among waterfowl near Yellowknife, Northwest Territories
James C. Bartonek, David L. Trauger
1975, Canadian Field-Naturalist (89) 234-243
Fourteen species of aquatic birds, including 11 species of ducks, were infested with leeches Theromyzon rude and Placobdella ornata near Yellowknife, Northwest Territories. Leeches infested 88% of 41 American Wigeon (Anas americana) and 31% of 86 Lesser Scaup (Aythya affinis) examined after death. Lesser Scaup captured by drive-trapping contained significantly...
Age determination of female redhead ducks
C.W. Dane, Douglas H. Johnson
1975, Journal of Wildlife Management (39) 256-263
Eighty-seven fall-collected wings from female redhead ducks (Aythya americana) were assigned to the adult or juvenile group based on 'tertial' and 'tertial covert' shape and wear. To obtain spring age-related characters from these fall-collected groupings, we considered parameters of flight feathers retained until after the first breeding season. Parameters measured...
Environmental factors affecting the strength of walleye (Stizostedion vitreum vitreum) year-classes in western Lake Erie, 1960-70
Wolf-Dieter N. Busch, Russell L. Scholl, Wilbur L. Hartman
1975, Journal of the Fisheries Research Board of Canada (32) 1733-1743
Commercial production of walleyes (Stizostedion vitreum vitreum) from western Lake Erie declined from 5.9 million pounds in 1956 to 140,000 pounds by 1969. Since 1956, marked irregularity in year-class success has developed. Only four year-classes were considered good during 1959–70. The rate and regularity of water warming during the spring...
Effects of pH on toxicity of antimycin to fish
L. L. Marking
1975, Journal of the Fisheries Research Board of Canada (32) 769-773
Detoxification of antimycin at pH 9.5 was caused by two factors. The piscicide was biologically unavailable at the high pH, and this unavailability was reversed by decreasing the pH of water solutions. Simultaneously antimycin detoxified with time, and the resulting loss in toxicity was irreversible. The toxicity of antimycin was...
Effects of agricultural burning on nesting waterfowl
E.K. Fritzell
1975, Canadian Field-Naturalist (89) 21-27
Agricultural burning in an intensively farmed region within Manitoba's pothole district is shown to affect the nesting activities of ground-nesting ducks. All species, except Blue-winged Teal (Anas discors), preferred unburned nest cover, although success was higher in burned areas, where predators may have exerted less influence. Attitudes of farmers, burning...
The new Martian nomenclature of the international Astronomical Union
Vaucouleur G. de, J. Blunck, M. Davies, A. Dollfus, I.K. Koval, G. P. Kuiper, H. Masursky, S. Miyamoto, V.I. Moroz, C. Sagan, B. Smith
1975, Icarus (26) 85-98
A new nomenclature for Martian regions and topographic features uncovered by Mariner 9, as officially adopted by the International Astronomical Union, is described. About 180 craters, generally of diameters >100 km, have been named, as well as 13 classes of topographic...
Determining earthquake recurrence intervals from deformational structures in young lacustrine sediments
John D. Sims
1975, Tectonophysics (29) 141-152
Examination of the silty sediments in the lower Van Normal reservoir after the 1971 San Fernando, California earthquake revealed three zones of deformational structures in the 1-m-thick sequence of sediments exposed over about 2 km2 of the reservoir bottom. These zones are correlated with moderate earthquakes that shook the San Fernando...
The determination of specific forms of aluminum in natural water
R.B. Barnes
1975, Chemical Geology (15) 177-191
A procedure for analysis and pretreatment of natural-water samples to determine very low concentrations of Al is described which distinguishes the rapidly reacting equilibrium species from the metastable or slowly reacting macro ions and colloidal suspended material. Aluminum is complexed with 8-hydroxyquinoline (oxine), pH is adjusted to 8.3 to...
A high 87Sr 86Sr mantle source for low alkali tholeiite, northern Great Basin
R. K. Mark, Hu C. Lee, H. R. Bowman, F. Asaro, E.H. McKee, R.R. Coats
1975, Geochimica et Cosmochimica Acta (39) 1671-1678
Olivine tholeiites, the youngest Tertiary units (about 8–11 m.y. old) at five widely spaced localities in northeastern Nevada, are geologically related to the basalts of the Snake River Plain, Idaho, to the north and are similar in major element and alkali chemistry to mid-ocean ridge basalts (MORB) and island arc...
Duck plague: carrier state and gross pathology in black ducks
Jorge E. Ossa
1975, Thesis
Duck plague (UP) is a highly fatal disease of ducks, geese, and swans (family Anatidae), produced by a reticulo-endotheliotrophic virus classified as a member of the Herpesvirus group. The disease was recognized in Europe in 1949. On the American continent, the disease was first diagnosed in the United States in...
Utilization of algae by fish: Final report to Hercules Incorporated, Wilmington, Delaware
J.G. Stanley, James E. Ellis, Jack B. Jones, W.H. Hastings
1975, Report
No abstract available at this time...
Schlumberger soundings and total field measurements in the Raft River geothermal area, Idaho
Adel A. R. Zohdy, Dallas B. Jackson, Robert J. Bisdorf
1975, Open-File Report 75-130
No abstract available....
Preliminary description and interpretation of cores and radiographs from Clear Lake, Lake County, California: Core 7
John D. Sims, Michael J. Rymer
1975, Open-File Report 75-144
Clear Lake, California is located in the California Coast Ranges about 120 km north of San Francisco and is the largest freshwater lake wholly within California. The lake basin is tectonically controlled (Anderson, 1936; Brice, 1953, Sims and Rymer, 1974) and the area seismically active (Coffman and von Hake, 1973).Interest...
Heavy minerals in stream sands of the southern Hazara District, Pakistan
Karl W. Stauffer
1975, Open-File Report 75-360
The areal distribution of heavy minerals in 99 samples from stream sands in the southern Hazara District, West Pakistan, indicates that the metamorphic grade of the rocks in the area increases toward the northwest. Minerals of potential economic value in the heavy-mineral samples include scheelite from the Oghi-Batgram-Battal area and...
Seismic reflection profiles R/V Polaris, March 1972 offshore southern California Pt. Conception cruise
Stephen C. Wolf
1975, Open-File Report 75-166
No abstract available....
Seismic-reflection profiles, R/V Kelez, Nov-Dec. 1973, continental borderland of southern California
George William Moore, Larry A. Beyer
1975, Open-File Report 75-330
No abstract available....
Dynamics of turbidity plumes in Lake Ontario
Edward J. Pluhowski
1975, Open-File Report 75-249
Large-turbidity features along the 275-kilometre long south shore of Lake Ontario were analyzed using LANDSAT-1 images. The ESIAC system developed by the Stanford Research Institute, was used to obtain enlargements and false-color renditions of turbidity plumes. After projection on a video screen, individual turbidity features were analyzed, mapped, and photographed.The...
Water-resources appraisal of the Carson River basin, western Nevada
Patrick A. Glancy, T. L. Katzer
1975, Open-File Report 75-179
No abstract available....
Palynological and stratigraphic investigations of four deep wells in the Salisbury Embayment of the Atlantic Coastal Plain
Eleanora I. Robbins, William J. Perry Jr., James A. Doyle
1975, Open-File Report 75-307
Use of palynological zones defined by Brenner and Doyle from the Cretaceous outcrop belt in Maryland, Delaware, and New Jersey permit correlation of the Cretaceous section in four wells drilled to basement in the Salisbury Embayment in the Eastern Shore of Maryland and in Accomack Co., Virginia. These correlations, supplemented...
A technique for estimating the magnitude and frequency of floods in Maine
Richard Arthur Morrill
1975, Open-File Report 75-292
No abstract available....
Precambrian and Lower Ordovician rocks in east-central Idaho
Edward Thompson Ruppel, R. J. Ross Jr., David Schleicher
1975, Professional Paper 889
No abstract available....
