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Mammals Of The Platte River Valley: Final Report, Patricia W. Freeman, Russell A. Benedict

University of Nebraska State Museum: Mammalogy Papers

Nebraska is characterised as a critical juncture for distributional ranges of mammals from northern, southern, eastern, and plains faunal elements. As might be expected, ranges have not remained static since the benchmark survey done by Jones, 1964. We have evidence that 10 of about 80 species of mammals found in the Platte River Valley have expanded their ranges. Opossum, red bats, bog lemmings, white-footed mice, woodchucks and least weasels are further west in the state, and grasshopper mice are further east in the state. Elliot's short-tailed shrew, cotton rats and armadillos are further north in the state. We have the …

Rural Flies In The Urban Environment?, Gustave D. Thomas, Steven R. Skoda

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Because metropolitan areas in the United States have been expanding at a dramatic rate, there has been direct competition between rural and urban interests for land. Also, market pressures often make it most profitable for meat producers to locate as close to urban centers as possible. A resultant growing interface between rural and urban centers, coupled with inadequate understanding of the people between the two centers, provides a potential for problems to develop. This book generally summarizes one area of contention - flies: few people tolerate flies in any setting anymore.

Wpa News 39 (1993), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (February 1993), number 39

Published by the World Pheasant Association

Geological Field Guide To The Cedar Point Biological Station, Keith County, Nebraska, Robert F. Diffendal Jr., Roger K. Pabian

School of Natural Resources: Faculty Publications

This field guide was produced by staff members of the Conservation and Survey Division of the University of Nebraska originally in 1979 at the request of Dr. Brent Nickol, former Director of the Cedar Point Biological Station. It is an introduction to the geologic history and paleoecology of the Cedar Point area intended for students, staff, and other persons using the camp. This revision has been made some 15 years after the first version to reflect changes in ideas resulting from new data collected during that time.

Users of this guide should take care when studying the rock exposures described …

Ard News February 1993

Agricultural Research Division: News and Annual Reports

CONTENTS:
COMMENTS FROM THE DEAN
106TH ANNUAL REPORT FOR ARD
FORM FOR RECORDING ALLOCATION OF PROGRAM RESOURCES
NEW OR REVISED PROJECTS
GRANTS & CONTRACTS RECEIVED DECEMBER 1992 AND JANUARY 1993
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
ESCOP RESEARCH INITIATIVES
DISTRIBUTION OF FEDERAL "BASIC" RESEARCH FUNDS BY PROGRAM AREA
COMPARISON OF INVESTMENTS IN AGRICULTURAL RESEARCH
PROGRAM SIZE AND FY 1991 RESEARCH EXPENDITURES OF SELECTED AGRICULTURAL EXPERIMENT STATIONS
COMPARISON OF SAES FUNDING SOURCES FY 1991
SAES LEADERSHIP DEVELOPMENT COURSE
COMPARISON OF PROGRAM SIZE – FY 1991

Economic Impact Of Leafy Spurge On Grazing Land And Wildland In North Dakota, F. Larry Leistritz, Dean A. Bangsund, Nancy M. Wallace, Jay A. Leitch

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

A variety of undesirable plants pose problems for managers of grazing land and/or wildland because they reduce the land's usefulness for livestock grazing or are detrimental to its other functions, such as wildlife habitat or watershed protection. The purpose of this study was to assess the direct and secondary economic impacts of leafy spurge infestations in North Dakota. This involved estimating the extent of leafy spurge infestations on grazing land and wildland, estimating the effects of the infestation on the outputs of both types of land, estimating the direct economic effects of these changes in outputs, and using input-output analysis …

Great Plains Research News And Notes - Vol. 3, No. 1, 1993

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

The Nebraska Chapter of The Wildlife Society (NCTWS) held its 1992 Annual Meeting and Technical Sessions on September 30 - October 2, 1992 at the 4-H Camp near Halsey, Nebraska. The goal was to provide a forum for professionals involved with wildlife in Nebraska to discuss new advances and recent ideas in management programs, public education, research, and technology.

This year's introductory session focused on Conservation Biology. NCTWS President Jon D. Kauffeld introduced keynote speaker Richard L. Knight of Colorado State University, who delivered an address entitled "What's So New About Conservation Biology?" The threat of losing biological diversity …

Review Of Medicinal Wild Plants Of The Prairie: An Ethnobotanical Guide By Kelly Kindscher, David J. Harter

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

This is a book for the advanced amateur. It comes five years after Kindscher's Edible Wild Plants of the Prairie which was also an outgrowth of the author's master's thesis (University of Kansas).

Kindscher set two goals for his new book and I believe that he will achieve both. He hoped that it would foster more understanding of the prairie and the uses of its constituent plants, and he wanted to encourage protection, conservation, and reestablishment of the prairie grasslands wherever possible. These goals are shared by many today, but the prairie speaks softly while competing interests such as farming, …

Review Of Medicinal Wild Plants Of The Prairie: An Ethnobotanical Guide By Kelly Kindscher, David J. Harter

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

This is a book for the advanced amateur. It comes five years after Kindscher's Edible Wild Plants of the Prairie which was also an outgrowth of the author's master's thesis (University of Kansas).

Kindscher set two goals for his new book and I believe that he will achieve both. He hoped that it would foster more understanding of the prairie and the uses of its constituent plants, and he wanted to encourage protection, conservation, and reestablishment of the prairie grasslands wherever possible. These goals are shared by many today, but the prairie speaks softly while competing interests such as farming, …

Review Of Rivers Of Change: Essays On Early Agriculture In Eastern North America By Bruce D. Smith, Karl J. Reinhard

Great Plains Research: A Journal of Natural and Social Sciences (through 2013)

Between 1970 and 1990 there was a burst of paleoethnobotanical research into prehistoric Native American subsistence practices across North America which has resulted recently in numerous regional syntheses. No synthesis is more salient or cogent than that presented for eastern North America by Bruce D. Smith who has been a key researcher in the area of prehistoric subsistence.

Differential Allocation Of Resources Underlies The Dispersal-Reproduction Trade-Off In The Wing-Dimorphic Cricket, Gryllus Rubens, Simon Mole, Anthony J. Zera

Anthony Zera Publications

The cricket, Gryllus rubens (Orthoptera, Gryllidae), exists in natural populations as either a fully-winged (LW), flight-capable morph or as a short-winged (SW) morph that cannot fly. The SW morph is substantially more fecund than the LW morph. In this study we report on the physiological basis of this trade-off between flight capability and fecundity. Results from gravimetric feeding trials indicate that LW and SW morphs are equivalent in their consumption and digestion of food. However, during the adult stage, the LW morph is less efficient in converting assimilated nutrients into biomass. This may be a consequence of the respired loss …

Critical Shear Stress And Critical Flow Rates For Initiation Of Rilling, John E. Gilley, W. J. Elliot, J. M. Laflen, J. R. Simanton

Department of Agricultural and Biological Systems Engineering: Faculty Publications

This study was conducted to identify critical shear stress and critical flow rates required to initiate rilling on selected sites. The data used in this investigation were collected from soils located throughout the USA where crop residues had been removed, and moldboard plowing and disking had occurred. Runoff and soil loss measurements were made on sites where simulated rainfall was applied to preformed rills. Multiple regression analyses were used to relate critical shear stress values and critical flow rates to selected soil properties. The soil-based regression equations were found to provide reliable estimates. Information identified in this study will improve …

A Sign-To-Speech Translation System, Koka Veera Raghava Rao

School of Computing: Dissertations, Theses, and Student Research

This thesis describes sign-to-speech translation using neural networks. Sign language translation is an interesting but difficult problem for which neural network techniques seem promising because of their ability to adjust to the user's hand movements, which is not possible to do by most other techniques. However, even using neural networks and artificial sign languages, the translation is hard, and the best-known system, that of Fels & Hinton (1993), is capable of translating only 66 root words and 203 words including their conjugations. This research improves their results to 790 root signs and 2718 words including their conjugations while preserving a …

Breed Comparisons For Growth Traits Adjusted For Within-Breed Genetic Trend Using Expected Progeny Differences, R. Nunez-Dominguez, L. Dale Van Vleck, Larry V. Cundiff

Department of Animal Science: Faculty Publications

Records (2,910) of birth (BWT), weaning (WW), and yearling weight (YW) of F₁ calves produced in a top-cross experiment involving Angus, Hereford, Pooled Hereford, Charolais, Limousin, Simmental, Gelbvieh, Maine-Anjou, Chianina, Tarentaise, Shorthorn, and Salers bulls mated to Hereford and Angus cows and records (4,592) of WW on three-breed-cross calves out of 986 F₁ females of the same breed crosses were used in this study. The purposes were to estimate how much of the EPD of the sires was realized in crossbred calves and to estimate sire breed effects for the traits adjusted for genetic trend and sire sampling. …

Long-Term Consequences Of Childhood Physical Abuse, Robin Malinosky-Rummell, David J. Hansen

Department of Psychology: Faculty Publications

This article reviews the literature on the long-term consequences of childhood physical abuse. Empirical research is discussed within 7 topic areas: aggressive and violent behavior, nonviolent criminal behavior, substance abuse, self-injurious and suicidal behavior, emotional problems, interpersonal problems, and academic and vocational difficulties. The studies reviewed involve primarily adult populations, although pertinent findings from literature on children and adolescents are briefly summarized. Some variables that affect the relation between physical abuse and long-term consequences are examined. These moderator variables include maltreatment characteristics, individual factors, family factors, and environmental factors. The article ends with suggestions for future research on long-term consequences …

Preliminary Outline For Preservation Of Tractor Test Building, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Outline of preliminary plan for the Preservation of the Tractor Test Building and early test equipment as monument to early days of the modern power farming industry.

Minutes Of Ag Tractor Test And Power Museum January 12th, 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

No abstract provided.

Biological Efficiency Differences Among Bos Taurus X Bos Taurus And Bos Indicus X Bos Taurus F1-Cross Cows, Ronnie D. Green, Larry V. Cundiff, Gordon E. Dickerson, Thomas G. Jenkins

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Matching germplasm to resources through designed crossbreeding programs can contribute to optimum beef production efficiency. This is particularly true in light of the wide diversity of environmental conditions encountered by beef producers in the U.S. This approach requires considerable knowledge about genetic diversity among breeds in components of performance and furthermore how those components interact to influence life-cycle efficiency in the production setting. It was largely this identified need, coupled with the importation of a number of new breeds from continental Europe, that gave impetus for the establishment of the Germplasm Evaluation (GPE) Program. In Cycles I and II of …

Characterizing Stress In Feeder Cattle, G. Leroy Hahn, John A. Nienaber

Roman L. Hruska U.S. Meat Animal Research Center: Reports

During the period August 6 to 10, 1992, a heat wave moved through central and eastern Nebraska. Maximum air temperatures were in the 90 to 95°F range, generally not considered to be extreme during the summer season. However, during this particular episode, the accompanying humidity was higher than normal (50 to 70% during the hottest portions of the day), with light to moderate winds except on August 8 when the wind was fairly strong. The relatively cool preceding summer weather had not adequately conditioned livestock to high levels of heat stress. As a result, several hundred feedlot cattle died in …

Gene Mapping In Cattle, Craig W. Beattie, Roger T. Stone, Michael D. Bishop, Sara L. F. Sunden, John W. Keele, Steven M. Kappes

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Over the last decade, progress in molecular biologic techniques has brought the mapping of genes within the human and mouse genomes to a point where information on the location of groups of genes and additional anonymous, but unique, bits of DNA (markers) within their respective genomes can be brought to bear in developing a bovine genomic map. This is possible because of the conservation of genes, particularly those concerned with regulating important functions, between species into syntenic (single chromosome) groups.

Investment in the development of a bovine map is important for several reasons. While continued selection of desirable traits by …

Immunization Against Inhibin Increases Sperm Production In Young Beef Bulls, Donald D. Lunstra, Terry L. Martin, Gary L. Williams, James J. Ireland

Roman L. Hruska U.S. Meat Animal Research Center: Reports

The specific biological mechanisms that control pubertal development, testicular growth and onset of sperm production in the beef bull have not been well defined. It is known that two protein hormones (the gonadotropins, LH and FSH) produced by the pituitary stimulate testicular growth, cause an increase in numbers of testicular receptors for LH and FSH, and stimulate production of steroid hormones by the testes. Researchers have shown that the patterns of LH and FSH secretion diverge during the peripubertal period in several species, including the bull. While LH increases during the peripubertal period of development in the bull, FSH exhibits …

Mortality And Cold Tolerance Of Calves With Different Ratios Of Bos Indicus To Bos Taurus Inheritance, Maurie J. Josey, Larry V. Cundiff, Robert M. Koch, Keith E. Gregory, G. Leroy Hahn

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Results from the Germplasm Evaluation Program (GPE) at the Roman L. Hruska U. S. Meat Animal Research Center (U.S. Meat Animal Research Center) have shown that significant differences exist among cows representing breeds of diverse biological types In such production traits as 200-day weaning wt per cow in the breeding herd. Production of Bos indicus F₁ cross cows (Brahman and Sahiwal sired crosses out of Hereford and Angus dams) was equalled only by F₁ cross cows sired by large size dual purpose breeds (Brown Swiss, Gelbvleh, Simmental, Holstein and Maine Anjou crosses out of Hereford and Angus dams) …

Beef Research Program Progress Report (1993) No. 4 (Part 1): Table Of Contents

Roman L. Hruska U.S. Meat Animal Research Center: Reports

ROMAN L. HRUSKA U.S. MEAT ANIMAL RESEARCH CENTER, D.B. Laster .... v

General Interest

Beef facilities and management at U.S. Meat Animal Research Center: W. Gordon Hays and Gary S. Ross .... 1

Genetics and Breeding

Cycle V of the germplasm evaluation (GPE) program in beef cattle: Larry V. Cundiff, Keith E. Gregory, and Robert M. Koch .... 3

Contributions of ovum cytoplasm and uterine environment and postnatal environment to maternal effects in beef cattle: Keith E. Gregory, and Ralph R. Maurer .... 6

Germplasm utilization in beef cattle: Keith E. Gregory, Larry V. Cundiff, Robert M. Koch, and Donald …

Evaluation Of Four Computer Models For Prediction Of Growth And Body Composition, Gary L. Bennett, Ralph N. Arnold

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Leaner, high quality beef can be produced by making good management and genetic decisions. The problem is knowing what is a good decision. Computer models can be used to predict the outcomes of different ways of producing beef. Managers can choose their best system using these predictions combined with their financial and feed resource information. Several computer models predict growth and body composition as part of an overall evaluation of beef production. Other models predict only growth and body composition. These models predict one or more of the following biological processes: the amount of feed consumed, the partition of consumed …

Development Of A Sensitive Antibody Detection Method To Bovine Viral Diarrhea Virus (Bvdv) Infection, Jimmy Kwang, E. Travis Littledike

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Bovine viral diarrhea virus (BVDV) is a RNA virus and a prototype member of the pestivirus genus in the genetic family Flaviviridae. Due to the rapid growth of BVDV molecular biology in the last 4 yr, our understanding of the genomic organization of BVDV has greatly increased, and a protein encoding map of the BVDV genome has been established. According to this map, it is generally accepted that a glycoprotein, identified as gp116, is the precursor which gives rise to gp62 and gp53 proteins through a proteolytic process. Further protein break down of gp62 yields glycoproteins gp48 and gp25. The …

Postpartum Interval Is Influenced By Nutritional Environment And Biological Type, Russell A. Nugent Iii, Thomas G. Jenkins, Andrew J. Roberts, John M. Klindt

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Reproduction is a major component of production efficiency for a cow-calf system. Failure of a cow to conceive is the most important factor reducing net calf crop. The interval from parturition to estrus, or postpartum interval, greatly influences the chances of a cow becoming pregnant during a restricted breeding season. Breeds can differ in length of postpartum interval and further, postpartum interval is influenced by numerous environmental factors including nutritional value of available feedstuffs. Inadequate energy availabilityincreases postpartum interval in suckled beef cows, but energy requirements differamong biological types. The level at which energy begins to limitreproductive performance may not …

A Track Physics Retrospective, Robert Katz

Robert Katz Publications

Many condensed matter dosimeters and detectors respond to the perspectives of track physics, a parametric model which relates their response to gamma rays to their response to heavy ions through the radial distribution of dose about a heavy ion’s path. Most dosimeters are treated as 1-hit detectors, a classification which includes emulsions, scintillators, TLDs, the Fricke dosimeter, alanine, and some biological substances: enzymes and Eschericia coli, among others. We have discovered many hit detectors. An extended model describes the killing, transformation, and mutation of biological cells after gamma and heavy ion irradiation. A detector is treated as a black box, …

But How Do We Get Them To Think?, Carol A. Weiss

Professional and Organizational Development Network in Higher Education: Archives

We hear this question constantly from faculty these days. This article will describe strategies for motivating and teaching students skills in this area.

Application Of Sealevel Stratigraphy To Neogene Great Plains Stratigraphy, Robert F. Diffendal Jr., A. Lowrie

Robert F. Diffendal, Jr., Publications

Absolute-dated high frequency (Milankovitch cycles) marine climate/sealevel oscillatory stratigraphy can be correlated generally with continental stratigraphies. Improvements in absolute dating of Neogene formations across the North American Great Plains make this a candidate area in which to correlate marine and continental stratigraphies. Mid-latitude continental areas respond directly to climate variations. During glaciated/ cold climates, sealevel lowering results in steepened river gradients, increased erosion all along the river channel, and larger stress-bed loads. This, combined with glacial catastrophic flooding, produces greater cut-and-fill sequences along river systems than crevasse splays along the emergent coastal plain, deltas along the shelf, and submarine fans …

The Honor Society Of Agriculture, Gamma Sigma Delta, Nebraska Chapter History, Diamond Jubilee 1918-1993, Charles H. Adams

Gamma Sigma Delta, Nebraska Chapter: Bylaws and Other Documents

GAMMA SIGMA DELTA is a faculty governed society that selects its members from junior and senior students, graduate students, faculty, and alumni for the promotion and recognition of high achievement. While Gamma Sigma Delta is an honor society of agriculture, it may elect members from related fields such as biology, botany, chemistry, economics, entomology, forestry, home economics, plant pathology, sociology, statistics, veterinary medicine, or zoology when the work of the individuals is related to agriculture. Officers, committee chairpersons, and others leading the chapter are faculty or alumni.

EARLY INTERNATIONAL HISTORY

GAMMA SIGMA DELTA INTERNATIONAL OFFICERS FROM THE NEBRASKA CHAPTER

THE …