Glen A. Sherwood
1970, North Dakota Outdoors (33) 8-11
Abstract has not been submitted...
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Publication Extents
Not all publications have extents, not all extents are completely accurateR.W. McDiarmid, N.J. Scott Jr.
1970, Science (179) 1-43
Wilbur L. Hartman
1970, Explorer (12) 6-11
Despite the tremendous value of the Great Lakes, a malaise is seriously destroying their worth. Accelerated enrichment, unabated pollution, over-exploitation, and accidental and intentional introduction of exotic species, have all been guided--more often misguided--by man. Of all five Great Lakes, Lake Erie stands out as the one most...
John W. Parsons
1970, Journal of the Fisheries Research Board of Canada (27) 1475-1489
The commercial fishery for walleyes (Stizostedion vitreum vitreum) in Lake Erie virtually collapsed in the late 1950's. The extreme decline in production was attributed primarily to a succession of weak year-classes, caused by habitat deterioration (increased water temperatures, enrichment, and pollution) in western Lake Erie. Unusually high fishing intensity and...
V. A. Adomaitis
1970, North Dakota Outdoors (33) 5-7
No abstract available....
Edward H. Brown Jr.
C.C. Lindsey, C.S. Woods, editor(s)
1970, Book chapter, Biology of coregonid fishes
The sex composition and other biological characteristics of the bloater changed substantially during recent decades of continuous ecological change in Lake Michigan. The percentages of females increased from 72% of the bloaters samples in 1928-32 to 95% in 1963, and ranged from 94 to 97% in 1964-69. The unusual predominance...
Glen A. Sherwood
1970, Prairie Naturalist (2) 23-27
Abstract has not been submitted...
Glen A. Sherwood
1970, North Dakota Journal of Education (49) 20-22
Abstract has not been submitted...
Herbert Ellis Allen, W.R. Matson, K. H. Mancy
1970, Journal of the Water Pollution Control Federation (42) 573-581
No abstract available....
Thomas A. Edsall
1970, Transactions of the American Fisheries Society (99) 376-380
Eggs from Lake Michigan alewives (Alosa pseudoharengus) were incubated at 79 different temperatures from 42.1 to 87.0 F. Hatching occurred at 44.4-84.9 F and was optimum (38% hatched) at about 64 F. Incubation time varied from 15 days at 45 F to 3.7 days at 70 F and 2.1 days...
F.B. Turner, G.A. Hoddenbach, P.A. Medica, J.R. Lannom Jr.
1970, Journal of Animal Ecology (39) 505-519
Between 1966 and 1967 populations of Uta stansburiana in southern Nevada increased about 40%. Over the next year they declined by about 50%. These changes are explained in terms of annual differences in fecundity and survival. Most females laid five clutches of...
Herbert H. Dill, Forrest B. Lee
1970, Report
Harold A. Doty
1970, Report
This pamphlet describes how to make, install and care for inexpensive duck nesting baskets. Ducks have been attracted to these structures in the prairies of eastern North and South Dakota, western Minnesota, and northern Iowa. Nesting structures can help increase the number of local nesting ducks, especially mallards....
Harold F. Duebbert
1970, Report
G.L. Pearson
1970, Prairie Naturalist (2) 15-22
Abstract has not been submitted...
W. L. Halvorson
1970, Thesis
No abstract available at this time...
Ralph Hile
1970, Transactions of the American Fisheries Society (99) 468-474
Most calculations of fish growth from scale measurements are made from one of four types of curves: straight line through the origin (Dahl-Lea); straight line with intercept (Lee); logarithmic line (Monastyrsky); empirically derived curve (SegerstråYle). Occasionally, different curves are used for different length intervals of fish. Present understanding of the...
Alan B. Sargeant
V.H. Cahalane, editor(s)
1970, Book chapter, Alive in the wild
G.M. DeGraeve
1970, Transactions of the American Fisheries Society (99) 433
No abstract available....
John T. Lokemoen
1970, North Dakota Outdoors (32) 12-14
Abstract has not been submitted...
J. S. Allen, P.D. Harman
1970, Progressive Fish-Culturist (32) 100
Abstract has not been submitted...
R.E. Lennon
C.E. Palm, editor(s)
1970, Book chapter, Vertebrate pests: problems and control
Abstract not submitted to date...
D. W. Cline
1970, Report
The response of game-farm mallards (Frost strain) to seven pharmacological immobilizing agents was evaluated in Phase I of a planned four-phase study. A limited amount of testing was also done with wild mallards. Single dosages were administered to determine the mean effective dose (ED50) and mean lethal dose (LD50), The...
J. C. Engels, C.O. Ingamells
1970, Geochimica et Cosmochimica Acta (34) 1007-1017
Error in K-Ar ages is often due more to deficiencies in the splitting process, whereby portions of the sample are taken for potassium and for argon determination, than to imprecision in the analytical methods. The effect of the grain size of a sample and of the composition of a contaminating...
Z. E. Peterman, Carl E. Hedge, H. A. Tourtelot
1970, Geochimica et Cosmochimica Acta (34) 105-120
Isotopic analyses of strontium in primary fossil carbonate reveal significant variations in Sr87Sr86">Sr87Sr86 of sea water during the Phanerozoic. The strontium isotopic composition may have been uniform from the Ordovician through the Mississippian, with an average Sr87Sr86">Sr87Sr86 of 0.7078. A subsequent decrease...