Infectious pancreatic necrosis: Selection of virus-free stock from a population of carrier trout
K. Wolf, M. C. Quimby, C. P. Carlson, G. L. Bullock
1968, Journal of the Fisheries Research Board of Canada (25) 383-391
Infectious pancreatic necrosis (IPN) is a virulent disease of young trouts and is easily transmitted from infected animals through water and with eggs. At present, the most effective control measure consists of propagation of specific pathogen-free stock. Methods are described for using fish cell cultures to detect IPN virus in...
Current status of whirling disease in salmonids in U.S
G. L. Hoffman
1968, American Fishes and U.S. Trout News (November-December) 10, 12, 19-20
Lamprey control and research in the United States
Bernard R. Smith
1968, Annual Report 1967
No abstract available....
Nuclear magnetic resonance studies of the phosphorus(v) pesticides: A rapid determination of the isomer ratio of systox
H. Babad, T.N. Taylor, M. C. Goldberg
1968, Analytica Chimica Acta (40) 387-392
The integration circuit of the Varian A-60 nuclear magnetic resonance spectrometer is used in conjunction with vapor phase chromatography, to develop a rapid analysis technique for the determination of isomer ratios in technical Systox-Sulfotepp mixtures. The complete analysis requires less than 0.1 g of sample...
Lead isotopes and the origin of granulite and eclogite inclusions in deep-seated pipes
J.F. Lovering, M. Tatsumoto
1968, Earth and Planetary Science Letters (4) 350-356
The isotopic composition of lead and the concentrations of lead, uranium, and thorium in Delegate basic pipes from Australia and in South African kimberlite pipes have been determined. The observed238U/204Pb and observed232Th/238U of eclogite inclusions in the pipes range from 2.9 to 18.7 and from 3.5 to 5.9, respectively. This...
An investigation of the source of air Ar contamination in K-Ar dating
A. E. Mussett, G. Brent Dalrymple
1968, Earth and Planetary Science Letters (4) 422-426
Precision of young KAr ages is limited by air argon contamination. A series of experiments in which the exposure of basalt and sanidine samples to air argon was controlled, shows that most of the air contamination does not...
Distribution of manganese between coexisting biotite and hornblende in plutonic rocks
L. P. Greenland, D. Gottfried, R.I. Tilling
1968, Geochimica et Cosmochimica Acta (32) 1149-1163
The distribution of manganese between coexisting biotite and hornblende for 80 mineral pairs from igneous rocks of diverse provenance (including Southern California, Sierra Nevada, Boulder, and Boulder Creek batholiths and the Jemez Mountains volcanics) has been determined by neutron activation analysis. Data on...
SrRbK and Sr isotopic relationships in ultramafic rocks, southeastern Alaska
M. A. Lanphere
1968, Earth and Planetary Science Letters (4) 185-190
Geologic evidence suggests that a series of ultramafic complexes of the ‘Duke Island type’ located along a 560 km-long belt in southeastern Alaska crystallized from magmas of ultramafic composition. Some geologists have proposed that these magmas were derived by fractional fusion of...
Spectrographic date on cores from the Pacific Ocean and the Gulf of Mexico
E. J. Young
1968, Geochimica et Cosmochimica Acta (32) 466-471
Average quantitative spectrographic data are presented for V, Ti, Zr, Ni, Co, Sc, Cr and La in the following Pacific deep-sea cores: siliceous ooze (3), red clay (6), volcanic mud (3), calcareous ooze (3) and one manganese nodule, and in 23 near-shore cores,...
The relationship of geophysical measurements to engineering and construction parameters in the Straight Creek Tunnel pilot bore, Colorado
J. H. Scott, F. T. Lee, R. D. Carroll, C. S. Robinson
1968, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (5) 1-30
Seismic-refraction and electrical-resistivity measurements made along the walls of the Straight Creek Tunnel pilot bore indicate that both a low-velocity and a high-resistivity layer exist in the disturbed rock surrounding the excavation. Seismic measurements were analyzed to obtain the thickness and seismic velocity...
Paleomagnetism and the compositions of highly-oxidised iron-titanium oxides in basalts
P.J. Smith
1968, Physics of the Earth and Planetary Interiors (1) 88-92
As a preliminary step towards determination of the source of the natural remanence in highly-oxidised basalt lava flows, electron probe microanalysis has been carried out on the two main phases in each of two types of highly-oxidised iron-titanium oxide. The discovery of the source of NRM in these basalts is...
Water quality of streams tributary to Lakes Superior and Michigan
Jerome W. Zimmerman
1968, Special Scientific Report - Fisheries 559
Water quality of streams tributary to Lakes Superior and Michigan was analyzed for 142 stations on 99 streams tributary to Lake Superior and 83 stations on 56 streams tributary to Lake Michigan during 1962-65. Concentrations of aluminum, copper, and iron were not affected greatly by flow or season. Magnesium, calcium,...
Reward banding to determine reporting rate of recovered mourning dove bands
R. E. Tomlinson
1968, Journal of Wildlife Management (32) 6-11
Reward bands placed on the other leg of certain regularly banded immature mourning doves (Zenaidura macroura) were used to develop information on reporting rates of recovered dove bands. Reports from 15 widely separated sections of the United States showed considerable variation in recovery rate of doves both with and without...
A surface tow net for collection of parasitic-phase sea lampreys
Frederick H. Dahl
1968, Progressive Fish-Culturist (30) 183-184
A STUDY OF MIGRATORY BEHAVIOR of parasitic sea lampreys (Petromyzon marinus) in the Great Lakes required a means of capturing lampreys for tagging and releasing in St. Marys River, Lake Huron. Smith and Elliott (1953) fished specially made gill and trap nets for sea lampreys, but stationary nets could not...
An improved girthometer for studies of gill net selectivity
Richard S. Wydoski, David R. Wolfert
1968, Progressive Fish-Culturist (30) 62-64
Gill nets are effective for collecting samples of many fish species. These nets may be highly selective in their catch, depending on the mesh size or sizes used and on the size distribution and body shape of the fish in the population. Early studies related mesh selectivity to...
Movements of adult lake trout in Lake Superior
Jerold F. Rahrer
1968, Transactions of the American Fisheries Society (97) 481-484
Returns from mature lake trout (Salvelinus namaycush) tagged in western Lake Superior in 1959 and 1962-65 described here suggest that trout disperse widely from the spawning grounds after spawning and return in subsequent years. Although the data were not extensive, returns from lake trout tagged near Keweenaw Point in 1950...
An electric beam trawl for the capture of larval lampreys
Alberton McLain, Frederick H. Dahl
1968, Transactions of the American Fisheries Society (97) 289-293
The chemicals used to control the sea lamprey, Petromyzon marinus, in the Great Lakes have drastically reduced populations of larval lampreys in tributary streams. These larvicides are too costly and difficult to apply, however, in inland lakes, estuaries, and bays. Populations of sea lampreys in these areas constitute...
Distribution and abundance of the Japanese snail, Viviparus japonicus, and associated macrobenthos in Sandusky Bay, Ohio
David R. Wolfert, Jarl K. Hiltunen
1968, Ohio Journal of Science (68) 32-40
A survey of the macrobenthos of Sandusky Bay, Lake Erie, in June, 1963, provided information on the abundance and distribution of the introduced Japanese snail, Viviparus japonicus, which has become a nuisance to commercial seine fishermen. The abundance and distribution varied considerably within the bay; at the time of the...
Seasonal depth distribution of fish in southeastern Lake Michigan
LaRue Wells
1968, Fishery Bulletin (67) 1-15
This study is based on systematic seasonal bottom trawling between 3 and 50 fathoms (5.5 and 91.5 m.) from February to November 1964 and supplementary information from other experimental fishing at additional depths and with other gear. The seasonal depth distribution of eight common species is described, and temperature relations...
Daytime distribution of Pontoporeia affinis off bottom in Lake Michigan
LaRue Wells
1968, Limnology and Oceanography (13) 703-705
The vertical migration of the amphipod Pontoporeia affinis in Lake Michigan has been well documented by Wells, Marzolf, and McNaught and Hasler. Wells and Marzolf observed Pontoporeia off bottom only at night. McNaught and Hasler, however, found Pontoporeia above the bottom shortly after noon in a 24-hr study on 12...
Antimycin for controlling sunfish populations in ponds
R.M. Burress
1968, Farm Pond Harvest (2) 11,12, 22
Abstract has not been submitted...
Annulus formation on scales of four species of coregonids reared under artificial conditions
Walter J. Hogman
1968, Journal of the Fisheries Research Board of Canada (25) 2111-2122
Scales from known-age coregonids reared in the laboratory were examined to determine when annuli formed and to learn possible factors of their formation. Scales were taken monthly from marked fish for periods up to 21 months. Scales were also examined from fish that died and from preserved specimens of young-of-the-year...
Gas chromatographic separation and quantitative estimation of barbiturate mixtures in solid dosage forms
J. L. Allen
1968, Journal of the Association of Official Analytical Chemists (51) 619-621
A gas chromatographic method has been described for the analysis of mixed barbiturates in solid dosage forms. Analysis on a 10% SE-30 column gave good separations for butabarbital, amobarbital, secobarbital, pentobarbital, and/or phenobarbital; amobarbital is not separated adequately from pentobarbital. An internal standard, mephobarbital, is used to minimize injection errors....
The alewife
Stanford H. Smith
1968, Limnos (1) 12-20
When the first alewife, Alosa pseudoharengus, was discovered in Lake Michigan near South Manitou Island on May 5, 1949, few people would have guessed that it would become the best known fish of the lake in less than two decades. Now it competes only with the coho salmon in...
Species succession and fishery exploitation in the Great Lakes
Stanford H. Smith
1968, Journal of the Fisheries Research Board of Canada (25) 667-693
The species composition of fish in the Great Lakes has undergone continual change since the earliest records. Some changes were caused by enrichment of the environment, but others primarily by an intensive and selective fishery for certain species. Major changes related to the fishery were less frequent before the late...
