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184301 results.

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Page 6467, results 161651 - 161675

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Survival in wood duck broods
Frank B. McGilvrey
1969, Journal of Wildlife Management (33) 73-76
Mortality of wood ducklings (Aix sponsa) from hatching to 6 weeks of age averaged 47 percent during a 4-year study at the Patuxent Wildlife Research Center. Over 90 percent of the total mortality occurred during the first 2 weeks of life. Brood bonds began to dissolve after the fifth week....
Fish furunculosis
S. F. Snieszko
1969, Fish Disease Leaflet 17
No abstract available at this time...
Selected hydrologic data, southern Utah and Goshen Valleys, Utah
R.M. Cordova
1969, Utah Basic-Data Release 16
The purpose of this report is to present basic geologic, ground-water, surface-water, and quality of water data that are useful for the study and effective development of the water resources of southern Utah and Goshen Valleys. This report supplements an interpretive report which will be published later.Much of the basic...
Comparison of thermal data from airborne and vessel surveys of Lake Erie
Alfred M. Beeton, James W. Moffett, Dana C. Parker
1969, Conference Paper, Proceedings of the 12th Conference on Great Lakes Research
A study of the applications of airborne infrared equipment for detecting water masses and currents of the Great Lakes is described. Infrared scanners were used to make thermal strip maps and an infrared radiometer was used to obtain surface temperatures of the western end of Lake Erie and the lower...
Relation of water loss to moisture content of hydrophytes in a natural pond
W. S. Eisenlohr Jr.
1969, Water Resources Research (5) 527-530
Hydrophytes growing in natural ponds on the Coteau du Missouri in North Dakota have been studied. Previous studies in the same region showed how transpiration by hydrophytes could be separated from the total water loss from a natural pond, during the period that vegetation was growing in height, on the...
Lake Ontario phytoplankton, September 1964
Roann E. Ogawa
1969, Technical Report 14
Phytoplankton counts on samples collected in Lake Ontario on September 8-18, 1964, showed that green algae were the dominant plankters and diatoms were of secondary importance. The greatest abundance of phytoplankton was close to shore from Toronto, along the southern shore of the lake, and up the eastern shore to...
Planktonic diatoms of Lake Ontario
Jerry F. Reinwand
1969, Technical Report 14
The major species of diatoms in surface collections from Lake Ontario in September 1964 were Asterionella formosa, Fragilaria crotonensis, and Tabellaris fenestrata. Dominant species in the deep-water samples were Stephanodiscus astraea, S. astraea var. mintula, and F. crotonensis. The diatom flora in surface collections varied among several stations in the...
Rearing of sea lamprey, Petromyzon marinus, embryos in distilled water
George W. Piavis, John H. Howell
1969, Copeia (1969) 204-205
Most embryological studies of lampreys in the Great Lakes have been conducted with filtered water from Lake Huron. Although this water was entirely satisfactory for the earlier work, the present need for knowledge of the effects of various compounds on embryological development requires that the initial medium be sterile....
Maturity and fecundity of walleyes from the eastern and western basins of Lake Erie
David R. Wolfert
1969, Journal of the Fisheries Research Board of Canada (26) 1877-1888
Of 2427 walleyes (Stizostedion vitreum vitreum (Mitchill)) examined from Lake Erie in 1964–66, no females were mature at ages below III and all were mature at age V. All male walleyes from the eastern basin were mature at age II, and those from the western basin at age III. Females from...
Sediment Transport in Streams in the Umpqua River Basin, Oregon
C. A. Onions
1969, Report
This report presents tables of suspended-sediment data collected from 1956 to 1967 at 10 sites in the Umpqua River basin. Computations based on these data indicate that average annual suspended-sediment yields at these sites range from 137 to 822 tons per square mile. Because available data for the Umpqua River...