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Full-Text Articles in Physical Sciences and Mathematics
Seasonal Movements And Habitat Selection Of Pheasant Cocks In South Dakota, Robert A. Fedeler
Seasonal Movements And Habitat Selection Of Pheasant Cocks In South Dakota, Robert A. Fedeler
Electronic Theses and Dissertations
Data were gathered on seasonal movements and habitat selection of 30 pheasant (Phasianus colchicus) cocks that were radio-equipped in eastern South Dakota from 1970 to 1972. Pheasant cocks stayed in an area of less than 100 acres from spring through hunting season. In winter, cocks used even smaller areas more intensively. Cocks moved about their home range by shifting their activity center rather than by adjustment in range of daily travel. Adult cocks seemed to have strong site attachments on a year-round basis. Immature cocks were more mobile, especially during the fall prior to hunting season. In spring, adult cocks …
Origin And Transport Of Nutrients In The Upper Big Sioux River, South Dakota, Charles William Thompson
Origin And Transport Of Nutrients In The Upper Big Sioux River, South Dakota, Charles William Thompson
Electronic Theses and Dissertations
The upper Big Sioux River Basin, in northeastern South Dakota, was studied to determine the origin and transport of nutrients in the Big Sioux River. The area was divided into three segments. Two of the segments, the Big Sioux River and Willow Creek Basins, were primarily agricultural drainage areas, and one segment was the city of Watertown. Sampling stations were selected to facilitate the determination of nutrient inputs to the river from each of these segments and to determine the nutrient load in the river leaving the study area. Nutrients studied included total orthophosphate and the particulate and dissolved fractions …
Evaluation Of Cattle Use Of A Deer Winter Range In The Black Hills, David C. Hamm
Evaluation Of Cattle Use Of A Deer Winter Range In The Black Hills, David C. Hamm
Electronic Theses and Dissertations
Cattle use of a deer winter range in the Black Hills was investigated during the summer grazing seasons of 1971-1972. A U.S. Forest Service grazing allotment situated between Mystic and Redfern, South Dakota, was used as the study area. The allotment was divided into five grazing units or pastures managed collectively under a “rest-rotation” system of grazing. Three study sites were selected in each unit of the allotment, and 75 exclosures were erected on each site; a paired-plot method was used to collect data. Indices to use of sites by deer and cattle were obtained by counts of deer pellet …
Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora
Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora
Electronic Theses and Dissertations
Concentration and flow of total phosphate (TP), total organic nitrogen (TON), and total organic carbon (TOC) were measured from November 9, 1971 to November 8, 1972 on the Big Sioux River, Six Mile-North Deer Creek, and Drainage M. The Big Sioux River transported 418,640 x 10 3 m3 of water, 776,880 kg TP, 599,590 kg TON, and 5,419,580 kg TOC during the study-year. Six Mile Creek transported 23,900 x 10 3 m 3 of water, 52,040 kg TP, 43,580 kg TON, and 327,860 kg of TOC. The transport of water and nutrients in Six Mile Creek per square kilometer of …
Evaluation Of Giant Canada Goose Restoration In Western South Dakota, Dennis L. Lengkeek
Evaluation Of Giant Canada Goose Restoration In Western South Dakota, Dennis L. Lengkeek
Electronic Theses and Dissertations
A study of giant Canada goose (Branta Canadensis maxima) restoration in western South Dakota was conducted during 1970 and 1971. Nesting, production and mortality, homing, and pioneering were evaluated both years. Nesting began April 4 in 1970 and extended for 73 days, but the peak of nesting occurred from April 29 to May 5. In 1971, nesting began April 1 and continued for 69 days, with the peak occurring April 8-14. The peak of hatching occurred June 6-12 in 1970 and May 8-14 during 1971. Small stockponds were utilized for nesting both years. Islands were preferred nesting sites. Peninsulas and …
Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson
Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson
Electronic Theses and Dissertations
Available phosphorus, organic carbon, and organic nitrogen were measured in bottom sediments of 16 lakes and ponds in northeast South Dakota. These lakes were glaciated, relatively shallow, and productive. Ranges of the surface sediments were: available phosphorus, 2 to 42 ppm; organic carbon, 0.94 to 5.34 percent; and organic nitrogen, 0.29 to 0.79 percent. Ranges of subsurface sediments were: available phosphorus, 2 to 39 ppm; organic carbon, 0.54 to 6.06 percent; organic nitrogen, 0.19 to 0.88 percent. Concentrations in most lakes varied little from top to bottom. Hard-bottomed lakes generally decreased in nutrient concentrations from sediment surface of subsurface. Lower …