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...
Summer distribution of pelagic birds in Bristol Bay Alaska
James C. Bartonek, D.D. Gibson
1972, Condor (74) 416-422
No abstract available....
Seasonal population characteristics of the opossum shrimp, Mysis relicta, in southeastern Lake Michigan, 1970-71
James B. Reynolds, G.M. DeGraeve
1972, Proceedings of the 15th Conference on Great Lakes Research (15) 117-131
This study of depth distribution, abundance, growth, reproduction and standing crop of the opossum shrimp, Mysis relicta, in southeastern Lake Michigan was based on monthly samples collected from August 1970 through July 1971 (except February and March). Population density was usually low at 10-20 fathoms, moderate at 25-30 fathoms and...
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...
Effect of certain anesthetic agents on mallard ducks
D.R. Cline, R. J. Greenwood
1972, Journal of the American Veterinary Medical Association (161) 624-633
Four anesthetic agents used in human or veterinary medicine and 3 experimental anesthetic preparations were evaluated for effectiveness in inducing narcosis when administered orally to game-farm mallard ducks (Anas platyrhynchos).Tribromoethanol was the only compound to satisfy criteria of initial tests. Mean duration of the induction, immobilization, and recovery periods was...
The future of salmonid communities in the Laurentian Great Lakes
Stanford H. Smith
1972, Journal of the Fisheries Research Board of Canada (29) 951-957
The effects of human population growth, industrialization, and the introduction of marine fishes have reduced the suitability of each of the Great Lakes for oligotrophic fish communities. The ultimate consequence has been a reduction of fishery productivity that has ranged from extreme in Lake Ontario to moderate in Lake Superior....
Life history and production of walleyes of the 1959 year-class in western Lake Erie, 1959-62
John W. Parsons
1972, Transactions of the American Fisheries Society (101) 655-661
Because of the near collapse of the fishery for walleyes (Stizostedion vitreum vitreum) in Lake Erie in the late 1950's, walleyes of the 1959 year-class were studied to gain a better understanding of the life history of the species and the dynamics of the population. In the summer of 1959...
Reconnaissance geologic map of the Cedaredge area, Delta County, Colorado
W. J. Hail Jr.
1972, IMAP 697
No abstract available....
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...
Highways and their impact on the wildlife in the pinyon-juniper-oak woodland and grassland in north-central Arizona
Charles L. Douglas, R. Roy Johnson
1972, Book
No abstract available....
New data on selected Ivory Coast tektites
F. Cuttitta, M. K. Carron, C. S. Annell
1972, Geochimica et Cosmochimica Acta (36) 1297-1309
Fourteen Ivory Coast tektites exhibit a range of bulk indices of refraction of 1.5156 to 1.5217 ± 0.0004 and of bulk specific gravities of 2.428 to 2.502 ±0.005. Seven of these Ivory Coast (IVC) tektites were analyzed for major and minor element content. Compared to tektites from other strewn fields,...
Differentiation and volcanism in the lunar highlands: Photogeologic evidence and Apollo 16 implications
N.J. Trask, J.F. McCauley
1972, Earth and Planetary Science Letters (14) 201-206
Materials of possible volcanic origin in the lunar highlands include (1) highland plains materials, (2) materials forming closely spaced hills in which summit furrows and chains of craters are common and (3) materials forming closely spaced hills (some of which parallel the...
Fluorination of 1,2,3-, 1,2,4-, and 1,3,5-trihalobenzenes with potassium fluoride in dimethyl sulfone
R.H. Shiley, D. R. Dickerson, G. C. Finger
1972, Journal of Fluorine Chemistry (2) 19-26
Three trifluorobenzenes were prepared by reaction of the corresponding trichlorobenzenes with potassium fluoride or pottassium fluoride-cesium fluoride mixtures in dimethyl sulfone. Molar yields were 12.8% for 1,2,3-, 8.3% for 1,2,4-, and 56.2% for 1,3,5-. Improved yields of the 1,2,3- (23.9%) and the 1,2,4-...
Biscalitheca suzanneana, N. Sp., from the uppermost Pennsylvanian of Texas
S.H. Mamay
1972, Review of Palaeobotany and Palynology (14) 141-147
Biscalitheca suzanneana, n. sp., is described from specimens found in an uppermost Pennsylvanian deposit in north-central Texas. The genus was identified primarily on the basis of impressions of the unique sporangial annuli. The occurrence establishes for Biscalitheca a stratigraphic range equivalent to nearly the entire...
Occurrence of chromian, hercynitic spinel ("pleonaste") in Apollo-14 samples and its petrologic implications
E. Roedder, P.W. Weiblen
1972, Earth and Planetary Science Letters (15) 376-402
Many isolated grains of a reddish pleonaste-type spinel occur in fines and metabreccia samples, particularly 14 319. Electron microprobe analyses (104) of spinels and their associated phases include 58 of pleonaste which show Mg/(Mg + Fe) 0.44–0.62 and Cr/(Cr + Al) 0.017–0.134...
The geologic setting of the Luna 16 landing site
J.F. McCauley, D. H. Scott
1972, Earth and Planetary Science Letters (13) 225-232
The Luna 16 landing site is similar in its geologic setting to Apollos 11 and 12. All three sites are located on basaltic mare fill which occurs mostly within multi-ring basins formed by impact earlier in the moon's history. A regolith developed...
Site distribution of iron in staurolite
Eric Dowty
1972, Earth and Planetary Science Letters (15) 72-74
The Mössbauer spectrum of staurolite does not necessarily indicate that ferrous iron is distributed over both the tetrahedral Fe site and one or more of the octahedral sites, as previously thought. Two doublets are present in the spectrum, but their quadrupole spliting...
Imogolite and allophane formed in saprolite of basalt on Maui, Hawaii
K. Wada, T. Henmi, N. Yoshinaga, S. H. Patterson
1972, Clays and Clay Minerals (20) 375-380
Inorganic gel and allophane collected from basaltic saprolite on Maul, Hawaii, and studied by Patterson in I964 were reexamined. The main constituent of the gel is imogolite, and gibbsite and allophane are the minor constituents. Electron and X-ray diffraction patterns, DTA curve, and an infrared spectrum of the gel are...
The martian atmosphere: Mariner 9 television experiment progress report
C.B. Leovy, G.A. Briggs, A.T. Young, B.A. Smith, James B. Pollack, E.N. Shipley, R.L. Wildey
1972, Icarus (17) 373-393
Atmospheric phenomena appearing in the Mariner 9 television pictures are discussed in detail. The surface of the planet was heavily obscured by a global dust storm during the first month in orbit. Brightness data during this period can be fitted by a semi-infinite...
Oceanic ridges and transform faults: Their intersection angles and resistance to plate motion
A.H. Lachenbruch, G. A. Thompson
1972, Earth and Planetary Science Letters (15) 116-122
The persistent near-orthogonal pattern formed by oceanic ridges and transform faults defies explanation in terms of rigid plates because it probably depends on the energy associated with deformation. For passive spreading, it is likely that the ridges and transforms adjust to a...
Geological framework of the south polar region of Mars
B. C. Murray, L.A. Soderblom, J.A. Cutts, R.P. Sharp, D.J. Milton, R.B. Leighton
1972, Icarus (17) 328-345
The first 4 months of Mariner 9 photography of the south polar region are discussed. Three major geological units have been recognized, separated by erosional unconformities. From oldest to youngest they are: cratered terrain, pitted plains, and laminated terrain. The latter unit is unique in occurrence to the polar region,...
Imaging experiment: The Viking Mars orbiter
M. H. Carr, W.A. Baum, G.A. Briggs, H. Masursky, D.W. Wise, D. R. Montgomery
1972, Icarus (16) 17-33
The general objectives of the Imaging Experiment on the Viking Orbiter are to aid the selection of Viking Lander sites, to map and monitor the chosen sites during lander operations, to aid in the selection of future landing sites, and to extend our...
Electron microprobe evaluation of terrestrial basalts for whole-rock K-Ar dating
E. A. Mankinen, G. Brent Dalrymple
1972, Earth and Planetary Science Letters (17) 89-94
Four basalt samples for whole-rock K-Ar dating were analyzed with an electron microprobe to locate potassium concentrations. Highest concentrations of potassium were found in those mineral phases which were the last to crystallize. The two reliable samples had potassium concentrated in fine-grained...
Prospects for earthquake prediction and control
J. H. Healy, W.H.K. Lee, L. C. Pakiser, C.B. Raleigh, M.D. Wood
1972, Tectonophysics (14) 319-332
The San Andreas fault is viewed, according to the concepts of seafloor spreading and plate tectonics, as a transform fault that separates the Pacific and North American plates and along which relative movements of 2 to 6 cm/year have been taking place. The resulting strain can be released by creep,...
Paleomagnetism of Midway Atoll lavas and northward movement of the Pacific plate
S. Gromme, F.J. Vine
1972, Earth and Planetary Science Letters (17) 159-168
Two deep drill holes through the reef limestones of Midway Atoll penetrated 120 m and 19 m of basaltic lavas that were dated by the KAr method at 18 my. Inclinations of natural remanent magnetization have been measured...
