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Articles 9361 - 9390 of 9843

Full-Text Articles in Physical Sciences and Mathematics

Distributional And Dimensional Patterns Of Muskrat Burrows, James G. Bruner Jul 1979

Distributional And Dimensional Patterns Of Muskrat Burrows, James G. Bruner

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Environmental And Physiological Effects On The Carbon Exchange Rate And Water Use Efficiency Of Alfalfa, Dennis D. Baldocchi Jul 1979

Environmental And Physiological Effects On The Carbon Exchange Rate And Water Use Efficiency Of Alfalfa, Dennis D. Baldocchi

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


The Prairie Naturalist Volume 11 , Number 2. June 1979 Jun 1979

The Prairie Naturalist Volume 11 , Number 2. June 1979

The Prairie Naturalist

SPECIES WITH EXTRA FLORAL NECTARIES IN A TEMPERATE FLORA (NEBRASKA) ▪ Kathleen H. Keeler

PLANTS OF MOUNT GOLIATH RESEARCH NATURAL AREA ▪ Jeanette Hartman and Rod Mitchell

STATUS OF THE STURGEON CHUB (HYBOPSIS GELIDA) AND SICKLEFIN CHUB (HYBOPSIS MEEKI) IN NORTH DAKOTA ▪ Robert C. Reigh and Dean S. Elsen

OBSERVATIONS ON COYOTE BIOLOGY IN NORTH-CENTRAL MISSOURI ▪ Fred B. Samson and Bill D. Hill

DESTRUCTION TO NESTING BIRDS ON A MARSH BAY BY A SINGLE STORM ▪ Martin K. McNicholl

BOOK REVIEWS

Presentations on Predators ▪ Staff

Migratory Game Birds ▪ Ronald A. Ryder

Wolf …


A Gering Formation (Miocene) Pumice Conglomerate And Associated Beds From Broadwater, Nebraska, Robert F. Diffendal Jr. Mar 1979

A Gering Formation (Miocene) Pumice Conglomerate And Associated Beds From Broadwater, Nebraska, Robert F. Diffendal Jr.

School of Natural Resources: Faculty Publications

The Mitchell Pass Member of the Gering Formation was defined by Vondra, Schultz, and Stout in 1969 on the basis of exposures in the Wildcat Ridge area of western Nebraska. The basal part of the member in many areas of Wildcat Ridge is a pumice-pebble conglomerate bed. A newly discovered pumice-pebble conglomerate locality occurs north of Broadwater, Nebraska, some twenty miles east of the easternmost previously reported exposure of the pumice conglomerate at Redington Gap on Wildcat Ridge. Pumice samples from Redington Gap and Broadwater have the same index of refraction and similar inclusions. Beds above the conglomerate and below …


The Prairie Naturalist Vol. 11, No. 1. March, 1979 Mar 1979

The Prairie Naturalist Vol. 11, No. 1. March, 1979

The Prairie Naturalist

ORIN ALVA STEVENS, A PRAIRIE NATURALIST ▪ G. Monson

FIRST RECORD OF LONG-TAILED JAEGER FOR NORTH DAKOTA ▪ T. Gatz and D. Treasure

NEW RECORDS OF THE DWARF SHREW (SOREX NANUS) IN SOUTH DAKOTA ▪ R. J. Cinq-Mars, R. S. Hoffmann and J. K. Jones, Jr.

THE ETHYLENE FROM BURNING LIGNITE AS A PROBABLE CAUSE OF COLUMNARITY IN NORTH DAKOTA JUNIPERS ▪ J. M. Murphy and D. J. Holden

CAMOUFLAGED COYOTE DEN ENTRANCES ▪ D. P. Althoff

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1978 ▪ R.N. Randall

NOTES

An Upland Nest of the Virginia Rail in North …


An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey Feb 1979

An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey

School of Natural Resources: Faculty Publications

A research effort was initiated in 1976 to develop an objective lake-effect snowfall forecast model for each of the Great Lakes. It is the purpose of this paper to present the development and evaluation of the forecast method which was created for the Lake Ontario induced snowfall systems. All Lake Ontario lake-effect days were identified for a 10-yead period prior to the 1976 snowfall season. Upper air surface observations were combined with overlake data for these lake-effect periods. The dominant predictors were derived through the diagnostic ability of stepwise multiple discriminant analysis. The final product of this research effort was …


Lake Erie Induced Mesosystems- An Operational Forecast Model, Kenneth F. Dewey Jan 1979

Lake Erie Induced Mesosystems- An Operational Forecast Model, Kenneth F. Dewey

School of Natural Resources: Faculty Publications

All Lake Erie lake-effect days for a 10-year period prior to the 1976-77 snowfall season were utilized in the development of an operational lake-effect snowfall forecast model. Upper air and surface observation were combined with overlake data and analyzed, using stepwise multiple-discriminant analysis. A nine-predictor mesoscale forecast model resulted from this statistical test and its performance was evaluated during the 1976-77 and 1977-78 snowfall seasons. The results of this evaluation indicate that it is possible to predict six intensities of the Lake Erie lake-effect snowstorm using this mesoscale model.


Aerial And Crop Resistances Affecting Energy Transport, S. B. Verma, B. J. Barfield Jan 1979

Aerial And Crop Resistances Affecting Energy Transport, S. B. Verma, B. J. Barfield

School of Natural Resources: Faculty Publications

No abstract provided.


Turbulence Under Conditions Of Sensible Heat Advection, R. P. Motha, S. B. Verma, N. J. Rosenberg Jan 1979

Turbulence Under Conditions Of Sensible Heat Advection, R. P. Motha, S. B. Verma, N. J. Rosenberg

School of Natural Resources: Faculty Publications

No abstract provided.


An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey Jan 1979

An Objective Forecast Method Developed For Lake Ontario Induced Snowfall Systems, K. F. Dewey

School of Natural Resources: Faculty Publications

A research effort was initiated in 1976 to develop an objective lake-effect snowfall forecast model for each of the Great Lakes. It is the purpose of this paper to present the development and evaluation of the forecast method which was created for the Lake Ontario induced snowfall systems. All Lake Ontario lake-effect days were identified for a 10-year period prior to the 1976 snowfall season. Upper air and surface observations were combined with overlake data for these lake-effect periods. The dominant predictors were derived through the diagnostic ability of stepwise multiple discriminant analysis. The final product of this research effort …


The States And Natural Hazards, The Council Of State Governments, Robert Kuzelka Jan 1979

The States And Natural Hazards, The Council Of State Governments, Robert Kuzelka

School of Natural Resources: Faculty Publications

No abstract provided.


Regional Tectonics And Seismicity Of Eastern Nebraska, R. R. Burchett Jan 1979

Regional Tectonics And Seismicity Of Eastern Nebraska, R. R. Burchett

School of Natural Resources: Faculty Publications

This annual report presents and interprets the information obtained by the Conservation and Survey Division (Nebraska Geological Survey) during contract year July 1, 1979, to June 30, 1980, under contract NRC-04-76-3l5 with the U. S. Nuclear Regulatory Commission. The information pertains to the geology, structure, tectonics, and seismicity of eastern Nebraska with emphasis on the vicinity south of Omaha, Nebraska. Some of the information presented here results from a combination of studies begun in earlier years but the greater part results from studies begun during the contract year.

The scope of the studies is summarized as follows:

1. Rock outcrops …


Planting Trees-Why Rather Than How, Angelo Cohn Jan 1979

Planting Trees-Why Rather Than How, Angelo Cohn

Journal of the Minnesota Academy of Science

Three evergreen plantings over 25 years in a private woodland are described and evaluated in terms of reforestation, economics and personal satisfaction. Credit is given to government foresters and support from the Minnesota Department of Natural Resources (DN\R) and the federal Forest Incentives Program (FIP). Changes in site preparation methods, selection of species and planting procedures are discussed as outcomes of research and field experience. Cost-benefits are assigned principally to human values reflected in family learning and enhanced appreciation of the ecosystem of rural Minnesota.


Fisheries Report No. 37 - An Inventory Of The Marine Resources Of The Bunbury Marine Area And Geographe Bay, Michael H. Walker Jan 1979

Fisheries Report No. 37 - An Inventory Of The Marine Resources Of The Bunbury Marine Area And Geographe Bay, Michael H. Walker

Fisheries Research Reports

The marine resources of the Geographe Bay/Bunbury marine area were investigated using a variety of fishing gear i.e. set lines, set nets, trawls, ring nets, beach seines, hand lines, trolling lines, traps and light attraction at night. All the ftsh species caught were documented as to breeding state and food habits.

Commercial species encountered as adults during fishing operations were: bronze whaler, whiskery and gummy sharks, Westralian jewfish, Australian herring, skippy, flathead, oriental bonito, blue and sandy sprat, pilchard, mulloway, whiting, yellowtail scad, flounder, and leatherjacket and as juveniles were: skippy, yellowtail scad, tailor, southern sea garfish, pilchard, blue and …


Fisheries Report No 33 - The Western Rock Lobster Fishery 1975 - 1976, G. R. Morgan, E H. Barker Jan 1979

Fisheries Report No 33 - The Western Rock Lobster Fishery 1975 - 1976, G. R. Morgan, E H. Barker

Fisheries Research Reports

iTshe fishery for the western rock lobster Panultrus ecygnus one of the most important single fisheries in Australia and an important export earner for the State. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and which are designed to limit the total effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the fishery both to ensure that the effort is remaining within the accepted limits and that the regulations are adequately performing their function of maintaining reasonably stable catches. …


Fisheries Report No 34 - The Status Of The Salt-Water Crocodile In The Glenelg, Prince Regent And Ord River Systems, Kimberley, Western Australia, A. A. Burbidge, H. Messel Jan 1979

Fisheries Report No 34 - The Status Of The Salt-Water Crocodile In The Glenelg, Prince Regent And Ord River Systems, Kimberley, Western Australia, A. A. Burbidge, H. Messel

Fisheries Research Reports

Counts were made of Salt-water Crocodiles (Crocodylus porosus) in the estuarine portions of the Glenelg, Prince Regent and Ord River systems of the Kimberley Division, Western Australia. During the survey 581 crocodiles were seen, including 143 hatchlings. The number of non-hatchling crocodiles in present the Glenelg system is estimated to be 200 to 259, in the Prince Regent 190 to 246 and in the Ord 235 to 306 (95% confidence limits).

The number of non-hatchling crocodiles present in the six Kimberley river systems now counted is estimated to be between 957 and 1243 (95% confidence limits) and we believe that …


Fisheries Report No 38 - The Shark Bay Prawn Fishery (1970 - 1976), J. W. Penn, R. W. Stalker Jan 1979

Fisheries Report No 38 - The Shark Bay Prawn Fishery (1970 - 1976), J. W. Penn, R. W. Stalker

Fisheries Research Reports

The existence of prawn stocks in Shark Bay, Western Australia, has been known since 1904 when the sailing ketch "Rip" on charter to the Western Australian Government, trawled large quantities of prawns from the area between Bernier Island and the mainland, Gale (1905). Although the Fisheries research vessel "Lancelin" trawled potentially commercial quantities of prawns from Shark Bay in the early 1950's, it was not until 1962 that a regular fishery was begun.

Today the prawn stocks of Shark Bay support Western Australia's largest and most consistent prawn fishery, having an annual production currently exceeding 2 000 tonnes. The catch …


Cenozoic Geology Of The North Platte River Valley, Morrill And Garden Counties, Nebraska, James B. Swinehart Jan 1979

Cenozoic Geology Of The North Platte River Valley, Morrill And Garden Counties, Nebraska, James B. Swinehart

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Exchange Coefficients Under Sensible Heat Advection Determined By Eddy Correlation, S. B. Verma Jan 1979

Exchange Coefficients Under Sensible Heat Advection Determined By Eddy Correlation, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


Design And Evaluation Of A Fisheries Information Storage And Retrieval System (Fisars) For The State Of South Dakota, Richard P. Kramer Jan 1979

Design And Evaluation Of A Fisheries Information Storage And Retrieval System (Fisars) For The State Of South Dakota, Richard P. Kramer

Electronic Theses and Dissertations

Extensive data collected each year from the streams and lakes of South Dakota necessitates a computerized system with which to efficiently utilize the large amount of material. A fisheries related data storage and retrieval system (FISARS) was developed sufficiently to provide cost estimates in creating and maintaining such a system. Detailed descriptions were made to provide information in implementing and utilizing the retrieval system. A survey was made of state fish and game agencies currently operating storage and retrieval systems. This information along with comments provided by the fisheries personnel in the state of South Dakota was used as a …


Inbreeding In Rainbow Trout (Salmo Gairdneri): Analysis Of Lethal Temperature Tolerence, Jospeh L. Mangiardi Jan 1979

Inbreeding In Rainbow Trout (Salmo Gairdneri): Analysis Of Lethal Temperature Tolerence, Jospeh L. Mangiardi

Electronic Theses and Dissertations

Inbreeding in rainbow trout (Salmo gairdneri) was evaluated in relation to an altered environment (upper lethal temperature 29 C), at four levels of inbreeding. At each level of inbreeding mean time to death for inbred, female-outbred half-sib, male-outbred half-sib and outbred families were evaluated. In all cases inbreds were less resistant to lethal temperature than were respective outbred families. Analysis of variance 9Snedecor’s F) and multiple range analysis (Tukey’s “w” procedure) provided inference limitations. Inbred fish were 82% less resistant to lethal temperature as comared to the respective outbred family at 50% inbreeding and 19% less resistant at 25% inbreeding. …


Expectation Of Genetic Alteration Of Muscle Composition And Growth Traits In Rainbow Trout (Salmo Gairdneri), George W. Partelow Jan 1979

Expectation Of Genetic Alteration Of Muscle Composition And Growth Traits In Rainbow Trout (Salmo Gairdneri), George W. Partelow

Electronic Theses and Dissertations

The breeding of farm animals to produce superior organisms has been extensively applied to many parts of the world. Much of the research has been concerned with the manip0ulation of muscle protein and fat in muscle tissue for the purpose of catering to human needs (Kielanowski 1972; Dinkel and Busch 1973; Olson et. al. 1976). Though fishes are able to convert food to quality protein more efficiently than most animals, they have been underutilized as a protein source in the United States. Until recently, genetic manipulation through selection to enhance their quality has not been extensively applied (Smith and Rumsey …


Pheasant Use Of Wetlands During The Winter And Application Of Landsat Imagery For Assessing Winter Habitat, Signe Sather-Blair Jan 1979

Pheasant Use Of Wetlands During The Winter And Application Of Landsat Imagery For Assessing Winter Habitat, Signe Sather-Blair

Electronic Theses and Dissertations

This study was designed to investigate 1) vegetative factors influencing ring-necked pheasant (Phasianus colchicus) use of wetlands during the winter, 2) the relationship of land use practices adjacent to wetlands and the use of such wetlands as winter cover by pheasants, and 3) the feasibility of assessing wetlands as pheasant winter habitat through the use of remote sensing data. Fifteen wetlands in Windsor Township, Brookings County, South Dakota, were randomly selected for study to estimate their use by pheasants. Use of cover types was analyzed by using multiple regression, chi-square, and t-tests. Correlation matrices were generated to locate significant relationships. …


Non-Game Bird Habitat Associated With Haul Roads And Surface Mining For Bentonite Clay, Tim A. Schaid Jan 1979

Non-Game Bird Habitat Associated With Haul Roads And Surface Mining For Bentonite Clay, Tim A. Schaid

Electronic Theses and Dissertations

A 2 year study was conducted to investigate possible differences in density and diversity of birds in relation to distance from mining haul roads and various aged mine spoils. Winter bird surveys and breeding bird counts were conducted during 1977 and 1978. Bird density and diversity were estimated and compared between the following habitat areas: old spoils (mined ≥20 years ago, unreclaimed), new spoils (mined ≤20 years ago, reclaimed) and unmined areas. Within unmined areas density and diversity of birds 100m, 300m, 500m, and 900m from a mining haul road were compared to detect differences in density and diversity with …


Population And Productivity Of A Flock Of Giant Canada Geese In Northeastern South Dakota, Ted A. Clausing Jan 1979

Population And Productivity Of A Flock Of Giant Canada Geese In Northeastern South Dakota, Ted A. Clausing

Electronic Theses and Dissertations

Population and productivity studies of giant Canada geese (Branta canadensis maxima) were conducted in northeastern South Dakota in 1976 and 1977. One hundred ninety-three of 436 randomly selected sample quarter sections on the 5,459 km2 area contained potential goose nesting habitat in 1976. Forty-six pairs, 6 indicated pairs, and 6 single geese were found on these 193 quarter sections during the 1977 nesting season. The population was estimated to be 1,880 geese. Recommendations were to continue aerial surveys in the spring and late summer and to supplement them with annual searches of the sample quarter sections used in this study. …


The Taxonomic Status Of Coyotes From Western South Dakota, Susan E. Lauzon Jan 1979

The Taxonomic Status Of Coyotes From Western South Dakota, Susan E. Lauzon

Electronic Theses and Dissertations

Expansion of the range of the coyote (Canis latrans) has been accompanied by numerous instances of hybridization with domestic dogs (C. familiaris). Recent studies have found a hybrid element in some wild coyote populations. The objectives of this study were to identify the taxonomic status of coyotes in western South Dakota, and to determine the degree of hybridization, if any, that is occurring between coyotes and domestic dogs in the state. Animals were collected from three areas in western South Dakota from September 1976 through January 1978. Skulls of 289 wild canids were cleaned; of these, 167 skulls from adults …


Special Reflectance Of Hydrophytes, Robert G. Best Jan 1979

Special Reflectance Of Hydrophytes, Robert G. Best

Electronic Theses and Dissertations

Identification of hydrophytes will improve the delineation and classification of wetlands on remotely sensed imagery. Spectral reflectance measurements of 10 species of hydrophytes were made with an Exotach radiometer during three phenological stages, flowering and early seed, senescence, and early emergent. Reflectance data were analyzed to determine significant (≥.95) reflectance differences between species in each of four spectral regions during each phenological stage. Eight species had significantly (≥.95) different reflectances during the flower and early seed stage. Only one species could not be spectrally separated during at least one phenological stage. The results indicate that films sensitive to both visible …


Winter Limnological Conditions In A Prairie Pothole And The Application Of Molecular Oxygen, Richard A. Fike Jan 1979

Winter Limnological Conditions In A Prairie Pothole And The Application Of Molecular Oxygen, Richard A. Fike

Electronic Theses and Dissertations

The physical, chemical, and biological conditions in Round Lake, Oakwood Lakes State Park, South Dakota were monitored during the 1977-1978 winter, and reaeration utilizing molecular oxygen was evaluated as a practical method to prevent winterkill. Ice and snow conditions after 20 December, 1977 allowed little light penetration, and phytoplankton numbers (6174/ml to 1668/ml) and chlorophyll concentration (46.6 mg/L to 14.1 mg/L) decreased throughout the winter. Aquatic bacteria and fungi comprised from 87.0% to 93.7% by number of the total cells identified (phytoplankton, bacteria, and fungi) in the lake water under ice. Dissolved oxygen declined to anoxic conditions after 19 January, …


Nesting Chronology Of South Dakota Ducks, Stephen A. Tessmann Jan 1979

Nesting Chronology Of South Dakota Ducks, Stephen A. Tessmann

Electronic Theses and Dissertations

Duck broods were censused on 476 randomly selected plots in South Dakota during July of the years 1973 through 1976. Broods were also censused on wetlands located off the study plots both in July and August of these years, except in 1976 when no August counts were made. Hatching and nest initiation dates were determined by back dating from brood age classes. Early nesting species were mallards (Anas platyrhynchos) and pintails (A. acuta). Northern shovelers (A. clypeata), redheads (Aythya americana), and canvasbacks (A. valisineria) were intermediate nesters while blue-winged teal (Anas discors), gadwalls (A. strepera), and American wigeons (A. americana) …


Catfish Cage Culture In A South Dakota Power Plant Cooling Reservoir, Gary P. Wheeler Jan 1979

Catfish Cage Culture In A South Dakota Power Plant Cooling Reservoir, Gary P. Wheeler

Electronic Theses and Dissertations

Studies were conducted to evaluate the Big Stone Power Plant cooling reservoir in northeastern South Dakota as a site for cage culturing channel catfish (Ictalurus punctatus) for market and sport fishery stocking. Temperatures suitable for catfish culture (21-32 C) were present in the reservoir from mid-March through mid-September 1978 and from mid-October through 4 November 1978, the end of the study period. Mean values of chemical parameters analyzed included dissolved oxygen - 8.8 mg/1, total available chlorine- 0.13 mg/1, pH - 8.6, specific conductance - 2228 micromhos/cm, total hardness - 1128 mg/1 as CaC03, calcium hardness - 570 mg/1 as …