Physical Sciences and Mathematics Commons^™

Effects Of Temperature And Moisture On Productivity Of Oryzopsis Hymenoides, L. C. Pearson

Progress reports

No abstract provided.

Further Development Of A Stream Ecosystem Model, J. H. Wlosinski, G. W. Minshall

Progress reports

No abstract provided.

Food Habits Of Young-Of-The-Year Fishes In Abbey Pond, South Dakota, Randall D. Radant

Electronic Theses and Dissertations

Food habits of young-of-the-year largemouth bass (Micropterus salmoides), bluegill (Lepomis macrochirus), black crappie (Pomoxis nigromaculatus), yellow bullhead (Ictalurus natalis), and yellow perch (Perca flavescens) were studied during 1973 and 1974 in Abbey Pond, South Dakota. Organisms found in young-of-the-year fish stomachs and in plankton samples were identified and counted in the laboratory. Zooplankton, aquatic insects and fish were the most important food organisms consumed by young fishes. Using Ivlev’s electivity index food electivity by the fishes for zooplankton was calculated. The size-specific food habits of young-of-the-year largemouth bass progressed from entomostracans to aquatic insects to fish. In most cases zooplanktons …

Distribution And Importance Of Stockdams, Dugouts, And Natural Wetlands To Breeding Waterfowl In South Dakota, James J. Ruwaldt

Electronic Theses and Dissertations

Wetland distribution and utilization by breeding waterfowl of stockdams, dugouts, and natural wetlands were investigated in South Dakota during 1973 and 1974. Wetlands in South Dakota were estimated to encompass 590,499 ha and to total 631,557 basins. Natural ponds and lakes comprised 74.7 percent of the wetland area and 46.0 percent of the total number. Stockdams composed 13.9 percent of the wetland area and 14.0 percent of the number, and dugouts 0.3 percent and 8.1 percent of the state’s wetland area and number respectively. Ninety-one percent of the ponds and lakes were found east of the Missouri River and 86.7 …

Results And Evaluation Of An Aerial Creel Survey Technique On Lake Sharpe, South Dakota, Bruce R. Schmidt

Electronic Theses and Dissertations

A creel survey, consisting of two independent surveys, was conducted on Lake Sharpe, South Dakota from May, 1973, through May, 1974. An aerial fisherman count was used to estimate fishing pressure and an angler interview survey was used to estimate catch rates, mean party size, mean fisherman day, and residence of the anglers. The results of the two surveys were combined to estimate harvest. The separate surveys were combined to estimate harvest. The separate surveys allowed optimum stratification and allocation of sampling effort for each. Estimated fishing pressure was 32,643 fisherman-hours, ±9.60% at the 95% confidence level, and the total …

Food Habits, Growth, And Production Of Young-Of-The-Year Walleyes, Stizostedion Vitreum Vitreum (Mitchell), In A South Dakota Pond, Ronne E. Walker

Electronic Theses and Dissertations

A 12.45 hectare South Dakota pond was stocked with 25,000 walleye, Stizostedion vitreum vitreum (Mitichell), fingerling on 13 June, 1973. Walleyes were monitored for growth rate and food habits until 13 September, 1973. Walleyes were removed from the pond using various methods in order to evaluate the efficiency of removal methods. The average total length and average weight of walleyes in the pond increased from 43.5 mm and 0.50 g on 13 June to 167.1 mm and 41.25 g on 13 September. This was a gain of 123. 6 mm and 40.75 g or an average daily increase of 1.34 …

Effects Of Atrazine On Penned Pheasants And The Occurrence Of Stress Marks On Feathers, Thomas Orin Melius

Electronic Theses and Dissertations

Doses of 4 g of atrazine (AAtrex) were not lethal to penned hen pheasants (Phasispus colchicus), but levels of 6, 8, 10 and 12 g induced mortality. Pen studies to determine the effects of atrazine on reproduction of hen pheasants were conducted with two replicates of the basic test. Birds were administered treatment levels of 0, 100, 200, or 400 mg of atrazine per hen per week. Egg production and gain in weight of hens were unaffected by the treatments. Replicate A eggs were unaffected by the treatments. Replicate A eggs were unaffected in shell thickness and pipping rates, while …

Chesapeake Bay Bibliography - Volume Iv. Virginia Waters, Sandra A. Gleason, Jane F. Stauble

Reports

The Chesapeake Bay Bibliography was initiated by the Virginia Institute of Marine Science in response to growing resource management problems of the Chesapeake Bay and its tributaries. With these problems came the realization that planning and management of such a great natural resource is an overwhelming task requiring the best available information. This bibliography, therefore, was undertaken to document existing sources of information, to help identify research and data gathering needs, and to develop a comprehensive research and information services programs for individuals interested in research on, and management of the natural resources of the Chesapeake Bay region.

The Chesapeake …

Studies For A Proposed Nansemond River Sewage Treatment Plant, Virginia Institute Of Marine Science

Reports

• Vol. 1: Summary and conclusion/ C.S Fang and Bruce Neilson.
• Vol. 2: An analysis of currents and circulation in Hampton Roads, Virginia / Bruce Neilson and Mark Boulé; Description of non-tidal flows / Maynard Nichols.
• Vol. 3: Water quality monitoring of Hampton Roads and the Nansemond River, Summer 1974 / Bruce Neilson ... [et al.]
• Vol. 4. : A survey of commercial shellfish in the vicinity of Newport News Point and Pig Point in the lower James River / Dexter Haven and Paul Kendall
• Vol. 5: A model for predicting the pollutant distribution from an outfall in a tidal estuary …

Eggshell Thinning And Pesticide Residues In Ospreys From The Lower Chesapeake Bay, Jerry Waller Via

Dissertations, Theses, and Masters Projects

No abstract provided.

La Gallina De Los Huevos De Oro, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

The Prairie Naturalist Volume 6, Nos. 3 And 4. September-December 1974

The Prairie Naturalist

A BIOLOGICAL SURVEY OF KRAFT SLOUGH ▪ G. L. Krapu & H. F. Duebbert

CHRISTMAS BIRD·COUNTS FOR NORTH DAKOTA - 1974 ▪ R. N. Randall

USE OF SMALL FENCES TO PROTECT GROUND BIRD NESTS FROM MAMMALIAN PREDATORS ▪ A. B. Sargeant & A. D. Kruse

BOOK REVIEW: Finding Birds in Minnesota ▪ E. M. Welter

The Prairie Naturalist Volume 6, No.2. June 1974

The Prairie Naturalist

WOOD DUCKS IN NORTH DAKOTA ▪ H. A. Doty

AERIAL FEEDING BY RED-WINGED BLACKBIRDS NEAR FULLER'S LAKE, NORTH DAKOTA ▪ W. C. Royall, Jr. & O. E. Bray

ARBOREAL WOODCHUCKS? ▪ K. T. Killingbeck

IMAGES, CHOICE, AND COMMUNITY DEVELOPMENT ▪ E. Smith

BREEDING STATUS OF THE LEAST BITTERN IN NORTH DAKOTA ▪ C. L. Cink

NOTE: Maximum Sizes for Ambystomatid Salamanders ▪ D. W. Larson

Microfossils From The Upper Severy Shale (Pennsylvanian) Near Dubois, Nebraska, Robert F. Diffendal Jr.

School of Natural Resources: Faculty Publications

Organic rich limestone nodules within the Severy Shale Formation collected directly above the Nodaway Coal Member near DuBois, Nebraska, have yielded a rich microflora and microfauna. The microflora includes Triletes megaspores, seeds, cuticle, and pieces of wood with well preserved structures. The microfaunal skeletal material is either partially or completely replaced by pyrite, marcasite, or, in rare cases, by sphalerite. The following major invertebrate groups and genera within these groups have been identified to date: Bryozoa (one undetermined genus); Brachiopoda (Juresania) ; Gastropoda (four undetermined genera); Ammonoidea (one undetermined genus); Ostracoda (Amphissites, Coryellites, Hollinella, Macrocypris); Echinoidea (five spine types); and …

Finitely Generated Modules Over Bezout Ringsrwiegand@Unl.Edu, Roger Wiegand, Sylvia Wiegand

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Let R be a Bezout ring (a commutative ring in which all finitely generated ideals are principal), and let M be a finitely generated R -module. We will study questions of the following sort: (A) If every localization of M can be generated by n elements, can M itself be generated by n elements? (B) If M 0 R m = Rn for some m, n, is Af necessarily free? (C) If every localization of M has an element with zero annihilator, does M itself have such an element? We will answer these and related questions for various familiar classes …

The Prairie Naturalist Volume 6, No.1. March 1974

The Prairie Naturalist

AVIAN MORTALITY FROM COLLISIONS WITH OVERHEAD WIRES IN NORTH DAKOTA ▪ G. L. Krapu

NOTES ON THE BIOLOGY OF THE OLIVE-BACKED POCKET MOUSE PEROGNATHUS FASCIATUS ON THE NORTHERN GREAT PLAINS ▪ J. E. Pefaur & R. S. Hoffman

NOTE: Swans Resting on the Surface of A Dry Lake ▪ D. S. Gilmer

Conservation Of The National Estate, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

In 1973 the Australian Government established a Committee of Inquiry under Mr. Justice R. M. Hope to inquire into the National Estate. Under its terms of reference the Committee was to assess the nature and condition of the National Estate and the measures which were being and should be taken for its preservation and enhancement.

Officers of the Department of Agriculture recognise that there are basic natural resources such as land, water, gene material and ecosystems which are essential elements of the National Estate held in trust by successive generations.

In a submission to the Inquiry, matters of particular concern …

Feeding Of Hatchery-Reared Brown Trout (Salmo Trutta L.) In Relation To The Diet In A South Dakota Stream, Richard W. Mccoy

Electronic Theses and Dissertations

One thousand five hundred catchable brown trout (17-26 cm) were stocked into the South Fork of the Yellowbank River May 17, 1973. Samples were taken one month apart from May 22, 1973, through October 29, 1973. Fifteen-minute drift samples were collected every hour for 24 hours and trout were captured every 4 hours. Trout captured ruing the study varied in condition ® from 1.34 to 2.55. Condition progressively decreased through August, rose in September, and decreased again by the October sample. The average weight of brown trout increased through the September sample and decreased in October. Two peaks in number …

La Investigación De Los Recursos Minerales Españoles Ante La Crisis De Materias Primas, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Automation Of The Continuous Coagulation Monitor, Dee Mitchell, James J. Oskowis

Technical Reports

The development of automation in the past 50 years has paralleled the accelerating growth of today’s vast technological society. Automatic control systems are indispensable extensions of man's brain that enable him to monitor and regulate his complex environment. The principles of automatic control have a wide range of applications and interests in virtually every scientific field. The need for automatic control systems in vital applications of environmental engineering is both real and urgent. Extensive pollution has resulted in unavoidable water re-use and in the inevitable establishment of stringent effluent standards. Both water and wastewater treatment processes have necessarily become more …

Environmental Evaluation Report On The Big Mulberry Creek Basin In Franklin, Madison, Newton, Johnson And Crawford Counties, Arkansas, Edward E. Dale Jr.

Technical Reports

The environmental evaluation report which follows is based on information supplied by the Corps of Engineers, Little Rock District, available literature, field observations made during the summer of 1972, and results of research now in progress on natural features of the Big Mulberry Basin. Since most major dams, levees, and flood retarding structures now in existence in the Ozarks have been constructed since about 1940, opportunities to make long term studies of their effects have been limited. Also, the natural vegetation, fauna, and archeology of the Big Mulberry Basin have not been extensively investigated, but available sources provide enough information …

Evaluation Of Duck Production On Waterfowl Production Areas In Northeast North Dakota, Gerald L. Heismeyer

Electronic Theses and Dissertations

An investigation of duck production on six Waterfowl Production Areas (WPA’s) in northeastern North Dakota was conducted during 1970-73. This investigation was conducted in conjunction with habitat-manipulation study by the Northern Prairie Wildlife Research Center that entailed prescribed burning of three WPA’s. Wetland habitat conditions, breeding populations and nesting were evaluated all four years. Brood observations were made during the last three years and nesting cover was evaluated during the last two years of investigation. Wetland habitat conditions were generally favorable during the first three years of investigation but in 1973 wetland conditions were extremely poor due to low precipitation …

Habitat Preferences And Food Habits Of Striped Skunks In Eastern South Dakota, Melvin S. Moe

Electronic Theses and Dissertations

Habitat preferences of striped skunks (Mephitis mephitis) in Brookings County, South Dakota, were determined rom the relationship of nighttime roadside indices to 25 habitat variables of 277, 1-square mile plots. Winter tracking was also conducted. Skunks were collected on the study area in 1972-1972, and contents of 59 stomachs and 63 colons were studied to determine food habits. Indices of prey abundance in different habitat types were obtained from snap-trap surveys. The 25 variables accounted for 14.9 percent of the variation in skunk numbers. The relationships of three of these variables to skunk numbers were significant (P<0.05). The significant variables and the variation accounted for by each were: (a) number of areas of idle grassland, 6.3 percent; (b) number of rockplies, 1.5 percent; and (c) acreage of idle grassland, 1.3 percent. Idle grasslands were the main activity centers of skunks tracked during the winter. Food habits were analyzed for the periods March-April, May-June, July-August, and September-November. Insects were the most frequently found food item in al time periods except March-April, during which mammals occurred more frequently. Mammals made up the largest volume of food in March-April and May-June. Amphibians made up the greatest volume in July-August, while amphibians, mammals, and insects were found in nearly equal volumes in September-November. Bird remains occurred during all time periods. Eggs were found in May-June and July-August. Meadow voles (Microtus spp.), the most frequent mammalian food item during all time periods, were common only in habitat types having heavy residual cover. Idle grassland is an important nestling cover for gamebirds and waterfowl. Since the number of areas of this cover type apparently has a stronger relationship with skunk numbers than its total acreage, grassland nesting cover might best be managed in large, homogeneous blocks. Areas managed in this way would probably support lower skunk densities than more diverse areas containing equal acreages of idle grassland, thus reducing nest predation by skunks. Skunk control programs should be most efficient when centered around idle grassland and rockplies.

Executive Meeting Minutes, Us/Ibp Desert Biome

Progress reports

No abstract provided.

Aculeate Hymenoptera (Vespidae And Sphecidae) Of Curlew Valley, George E. Bohart, George F. Knowlton, Wilford J. Hanson

Progress reports

No abstract provided.

Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, R. Mankau, S. A. Sher

Progress reports

No abstract provided.

Ecology Of Cool Desert Annuals, L. G. Klikoff, D. C. Freeman, N. Negus

Progress reports

No abstract provided.

Nitrogen Transformations In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunter, A. Wallace, M. Romney, P. A. T. Wieland

Progress reports

No abstract provided.

Mycorrhizae Of Desert Plants, E. E. Staffeldt, K. B. Vogt

Progress reports

No abstract provided.

Measurement Of Evapotranspiration With A Monolith Lysimeter, D. W. Young, D. D. Evans, T. W. Sammis

Progress reports

No abstract provided.