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Page 6388, results 159676 - 159700

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Publication Extents

Not all publications have extents, not all extents are completely accurate
A definition of depletion of fish stocks
John Van Oosten
1949, Transactions of the American Fisheries Society (76) 283-289
Attention was focused on the need of a common and better understanding of the term depletion as applied to the fisheries in order to eliminate if possible the existing inexactness of thought on the subject. Depletion has been confused at various times with at least ten different ideas associated with...
Structure and senses of fish
Ralph Hile
1949, Marine Fisheries Review (35) 48-53
Also printed as U. S. Fish and Wildlife Service. Fisheries Leaflet 132. 13 pp....
The present status of the United States commercial fisheries of the Great Lakes
John Van Oosten
1949, Transactions of the North American Wildlife Conference (14) 319-330
This review of the trends in production on the Great Lakes suggests that great biological changes have taken place. The general abundance of the choicer varieties, and of some of the less choice fishes, has been lowered considerably; and the prospects are that this level will fall still farther....
Trends in the lake trout fishery of Lake Huron through 1946
Ralph Hile
1949, Transactions of the American Fisheries Society (76) 121-147
The production of lake trout, Cristivomer namaycush (Walbaum), in the United States waters of Lake Huron was highest in the earliest years for which there are statistical records, averaging 2,362,000 pounds in 1879–1894. The general level of yield was much lower but relatively stable in 1895–1939, during which period the...
Progress report on the sea lamprey study
John Van Oosten
1949, The Fisherman (17) 6, 9-10
SUMMARY: The Peromyscus leucopus on a 17-acre study area were live-trapped, marked, and released over a seven-day period. On the three following nights intensive snap-trapping was done on the central acre of the study plot. The animals caught by snap traps in...
Le stereorestituteur Kelsh
H. T. Kelsh
1949, Photogrammetria (6) 123
Le stéréorestituteur Kelsh est un appareil de restitution à double projection basé sur le principe des anaglyphes, comme le Multiplex par exemple, mais il a une plus grande précision que ce dernier, vu que les négatifs sont utilisés directement pour la restitution, sans que l'on soit obligé de les réduire...
Response of brook, rainbow, and brown trout to various dosages of sulfamerazine
J.S. Gutsell, S. F. Snieszko
1949, Transactions of the American Fisheries Society (77) 93-101
During experiments in 1945 and 1946 in which sulfamerazine in the food was found to be effective in the treatment of furunculosis in brook trout (Salvelinus fontinalis), it was observed that fish grew faster on untreated food and that when the dosage rate was heavy they did not eat...
Relations of bauxite and Kaolin in the Arkansas bauxite deposits
M.I. Goldman, Joshua Irving Tracey Jr.
1949, Economic Geology (41) 567-575
Investigation of the Arkansas bauxite deposits by the U. S. Geological Survey during the years 1942 to 1945 has brought out the fact that secondary kaolinization or silication of the bauxite is much more common than has been generally recognized. On the other hand no direct evidence was found of...
Natural water losses in mountain drainage areas of southern California
Harold C. Troxell, H.M. Stafford
1949, Eos, Transactions, American Geophysical Union (30) 752-758
For twenty‐five small mountain drainage areas of Southern California, natural water losses are shown to vary with basin altitude, and with estimated absorptive and retentive characteristics of the drainage areas. Among other relationships demonstrated is the increase of the annual natural water loss with increased annual precipitation to an optimum,...
Ground water in the East Shore area, Utah. Part I. Bountiful District, Davis County
H. E. Thomas, W.B. Nelson
1948, Technical Publication 5
The Bountiful district in Davis County, Utah, less than 10 miles from the heart of Salt Lake City, is rapidly becoming an integral part of the metropolitan area of Salt Lake City. It cannot achieve the development that its location merits unless the present water supplies are increased. The district...
A report upon the Grand Coulee Fish Maintenance Project 1939-1947
F. F. Fish, Mitchell G. Hanavan
1948, Special Scientific Report - Fisheries 55
The construction or Grand Coulee Dam, on the upper Columbia River, involved the loss of 1,140 lineal miles of spawning and rearing stream to the production of anadromous fishes. The fact that the annual value of these fish runs to the nation was estimated at $250,000 justified reasonable expenditures to...
New compounds for the control of bacterial gill disease
R.R. Rucker
1948, Progressive Fish-Culturist (10) 19-22
BACTERIAL GILL DISEASE, a common epizootic among hatchery fish, can be controlled by copper sulphate dips, as stated by Davis (1945), or by prolonged treatments with Roccal, as noted by Fish (1947). The use of copper sulphate is not without danger because of variation in toxicity according to the hardness...
The return on the blueback salmon to the Columbia River
Frederick S. Fisher
1948, Scientific Monthly (66) 283-292
THE year 1941 was a crucial one for the blueback salmon of the Columbia River. During that year, one brood came closer to extinction than was realized by more than a few individuals. The immediate causes were not overfishing, hydroelectric power development, or irrigation—although these factors continued to exert their...
Removal of excess nitrogen in a hatchery water supply
R.R. Rucker
1948, Progressive Fish-Culturist (10) 88-90
The water system at the U. S. Fish Cultural Station, Leavenworth, Washington, has been supplemented with two wells that were to be used to increase the temperature of the water during the winter and to cool the Water in the summer if necessary. The well water proved to be unsuitable...
Cranberry magnetite deposits Avery County, N.C., and Carter County, Tenn.
M.H. Kline, T.J. Ballard
1948, U.S. Bureau of Mines Report of Investigations 4274
The Cranberry magnetite deposits occur in pre-Cambrian granite-gneiss in a belt extending from 3 miles southeast of Cranberry, N.C., to about 6 miles southwest of Magnetic City, Tenn. The belt forms a curve, elongated to the north, approximately 26 miles in length....