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Acoustic-reflection profiles, eastern Greater Antilles: Leg 3, 1971 cruise, UNITEDGEO I
Louis E. Garrison
1972, Report
IntroductionAs part of a cooperative marine research program designated the Internataional Decade of Ocean Exploration (IDOE), the United states Geological Survey is participating in an investigation of the geologic framework and resource potential of continental margins and small ocean basins in the Gulf of Mexico, Caribbean Sea, and west African...
Acoustic-reflection profiles, Bay of Campeche: International Decade of Ocean Exploration, U.S. Geological Survey, Leg 1, 1971 cruise, UNITEDGEO I
George William Moore
1972, Report
IntroductionAs part of a cooperative marine research program designated the International Decade of Ocean Exploration (IDOE), the United States Geological Survey is participating in an investigation of the geologic framework and resource potential of continental margins and small ocean basins in the Gulf of Mexico, Caribbean Sea, and west African...
Fish rhabdoviruses: Morphology and ultrastructure of North American salmonid isolates
R. W. Darlington, R. Trafford, K. Wolf
1972, Archiv Fur Die Gesamte Virusforschung (39) 257-264
The morphology and ultrastructure of three North American salmonid pathogens, Oregon sockeye salmon, chinook salmon and infectious hematopoietic necrosis viruses, were examined by thin sectioning and negative staining after growth in fathead minnow cells at 10 ° C. The viruses matured at the plasma membrane of these cells. They were...
Destruction of the ecosystem in the Great Lakes and possibilities for its reconstruction
Stanford H. Smith
Remedios W. Moore, editor(s)
1972, Book chapter, Progress in fishery and food science
This paper is a review of the sequence of events within the Great Lakes and their drainage to provide a basis for interpreting probable cause-and-effect relations between events of settlement and changes in the ecosystem of the Great Lakes. Possibilities of restoration of the lakes are discussed. A plan to...
Some rates of geomorphological processes
Luna Bergere Leopold, William W. Emmett
1972, Geographia Polonica (23) 27-36
This brief report summarizes three sets of measurement data on certain processes.The first concerns the rate of movement of soil on hillslopes, especially by mass movement or slow gravitational creep. The results are abstracted from an unpublished manuscript by the junior author who reports on the measurements which Leopold began...
Duck hepatitis virus Interactions with DDT and dieldrin in adult mallards
Milton Friend, D.O. Trainer
1972, Bulletin of Environmental Contamination and Toxicology (7) 202-206
There has been considerable speculation regarding possible imteractlons within biological systems between synthetic environmental pollutants and infectious disease agents (1-11). This type of interaction has been studied in our laboratory using the mallard, Anas platyrhynchos, as a test species (5,6). Since adult ducks are refractory to the overt manifestations of...
Limnology and fish ecology of sockeye salmon nursery lakes of the world
Wilbur L. Hartman, R.L. Burgner
1972, Journal of the Fisheries Research Board of Canada (29) 699-715
Many important, recently glaciated oligotrophic lakes that lie in coastal regions around the northern rim of the Pacific Ocean produce anadromous populations of sockeye salmon, Oncorhynchus nerka. This paper describes the limnology and fish ecology of two such lakes in British Columbia, five in Alaska, and one in Kamchatka. Then...
Survey for infectious hematopoietic necrosis (IHN) virus in Washington salmon
Donald F. Amend, James W. Wood
1972, Progressive Fish-Culturist (34) 143-147
A virus disease of juvenile sockeye salmon (Oncorhynchus nerka) has been a problem in Washington hatcheries since first reported by Rucker [9] in 1953. Presumably, the same disease has occurred in Oregon, and it is now referred to as the Oregon, and it is now referred to as the Oregon...
Imaging experiment: The Viking Lander
T.A. Mutch, A.B. Binder, F.O. Huck, E.C. Levinthal, E. C. Morris, C. Sagan, A.T. Young
1972, Icarus (16) 92-110
The Viking Lander Imaging System will consist of two identical facsimile cameras. Each camera has a high-resolution mode with an instantaneous field of view of 0.04°, and survey and color modes with instantaneous fields of view of 0.12°. Cameras are positioned one meter...
Factors of ecologic succession in oligotrophic fish communities of the Laurentian Great Lakes
Stanford H. Smith
1972, Journal of the Fisheries Research Board of Canada (29) 717-730
Oligotrophic fish communities of the Great Lakes have undergone successive disruptions since the mid-1800s. Major contributing factors have been intensive selective fisheries, extreme modification of the drainage, invasion of marine species, and progressive physical–chemical changes of the lake environments. Lake Ontario was the first to be affected as its basin...
Population biology of alewives, Alosa pseudoharengus, in Lake Michigan, 1949-70
Edward H. Brown Jr.
1972, Journal of the Fisheries Research Board of Canada (29) 477-500
Alewives were unknown in Lake Michigan before 1949, but became extremely abundant in the 1960s and soon exceeded the carrying capacity of the lake. In 1967 they were decimated by a lakewide mass mortality, and have since been less abundant as "adults" (≥120 mm long), although numerous young were produced in...
Studies on the control of whirling disease (Myxosoma cerebralis)
G.L. Hoffman Sr., G.L. Hoffman Jr.
1972, Journal of Wildlife Diseases (8) 49-53
Based on presumptive evidence of death (extrusion of polar filaments and disintegration of sporoplasm) 1.0%, 0.5%, and 0.25% calcium oxide or potassium hydroxide killed the spores of Myxosoma cerebrallis in vitro. Chlorine at 400 ppm destroyed 36% to 90% of the spores but 13% to 37% of those in the controls...