Life Sciences Commons^™

G92-1101 Dairy 10-Point Quality Control Program--Mastitis Treatment Records, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide presents a mastitis treatment record keeping system that will help to reduce the chances of having adulterated milk enter the milk tank.

Starting July 1, 1993, the national Milk and Dairy Beef Quality Assurance Program will become effective. This program is a direct result of media attention concerning milk quality. It also reflects a growing consumer concern with drug residues in the nation's food supply chain. The American Veterinary Medical Association and National Milk Producers Federation responded to these concerns by developing a ten-point Milk and Dairy Beef Residue Prevention Protocol.

Nf92-71 Nutrition And The Athlete: Vitamin And Mineral Supplements, Linda S. Boeckner

University of Nebraska-Lincoln Extension: Historical Materials

For the public as well as for athletes, vitamin/mineral supplements are frequently used nutritional supplements. Much of this use represents an expensive and wasted effort. Well-planned diets can meet most of the vitamin and mineral needs of people.

Nf92-74 Nutrition And The Athlete: Protein Needs, Linda S. Boeckner

University of Nebraska-Lincoln Extension: Historical Materials

The following information explores some of the misconceptions about athletes' protein needs. In spite of current knowledge about protein use in the body, there is still an improper belief that protein supplements will result in a more well-muscled and efficient body. Please read on for an update on protein needs for athletes.

Parasitology As An Interpretive Tool In Archaeology, Karl J. Reinhard

Karl Reinhard Publications

Parasitological studies of archaeological sites can be used to interpret past beh avior and living conditions. During the 1980s problem-oriented research into prehistoric- and h istorical-period parasitism developed and resulted in thefield of archaeoparasitology. A rchaeoparasitology attempts to integrate parasite data into archaeological theory and interpretation. Within the last decade,four major archaeoparasitologicallaboratories emerged. They developed interpretive frameworks that apply parasitological data to a remarkable variety of prehistoric beh aviors. Parasite remains can be used to reconstruct aspects of diet. health . and other behaviors such as transhumance and trade. Finally. analysis of the distribution of parasite remains can be used …

Coprolite Analysis: A Biological Perspective On Archaeology, Karl J. Reinhard, Baughn M. Bryant Jr

Karl Reinhard Publications

The most remarkable dietary remains recoverable from archaeological contexts are coprolites. Coprolites are desiccated or mineralized feces that are preserved in sheltered and open sites in arid regions, primarily in the New World. These dietary remains are remarkable from several perspectives. They typically contain a variety of macroscopic and microscopic remains that form interrelated data sets for the reconstruction of diets. Because contexts containing coprolites are typified by excellent preservation, the remains coprolites contain tend to be in better states of preservation than dietary remains recovered from nonfecal deposits. Coprolites also contain the well-preserved remains of intestinal parasites and pathogens …

Vertebral Pathology In Prehistoric And Historic Skeletons From Northeastern Nebraska, Karin L. Sandness, Karl J. Reinhard

Karl Reinhard Publications

Vertebral pathology has long been a useful criterion for anthropologists in the assessment of activity patterns, stress, and general health of extinct peoples. This method of analysis, however, has never been applied to the peoples of the Nebraska Great Plains. This study is the first to concentrate on the indigenous Native Americans of this region, examining the spinal pathology present in the prehistoric and historic skeletal remains. Pathology present in the form of spondylolysis, Schmorl's nodes, osteophytosis (degenerative disc disease), and osteoarthritis (degenerative joint disease), provides evidence to suggest differing activity patterns and levels of stress in Plains groups before …

Dan Canyon Burial: A Piii Burial In Glen Canyon National Recreation Area, Steve Dominguez, Karl Reinhard, Kari L. Sandness, Cherie A. Edwards, Dennis Danielson, F. A. Calabrese, Chris Kincaid

Karl Reinhard Publications

The Dan Canyon burial was discovered at a time when the philosophy, ethics, and legislation concerning the study of human remains are in a state of flux. A number of important sensitive issues germane to managers, archeologists, and American Indians are discussed in the introduction. The subsequent analysis provides a detailed scientific account of these remains and a glimpse of a segment of a people's past lifeway while remaining sensitive to the wishes of the American Indians.

The burial and associated grave goods of site 42SA21339 were exposed by wave action in a location frequented by boaters at the Glen …

Pqf News: Newsletter Of The Partridge, Quail And Francolin Specialist Group 1-3, 5-6 (1992-1995), Iucn Species Survival Commission, Birdlife International, World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

The purpose of the newsletter is to receive details of new projects, re-assessments of the status of relevant species, interesting discoveries or observations, taxonomic changes, conservation successes or threats and anything else that members might find interesting. We would like in future issues to produce a list of relevant publications which appear during the year in order to keep members up-to-date with current information. We will publish requests for contacts or information, advertisements for conferences and workshops and news of projects and project proposals.

Issue 1 (February 1992)

Foreword by Simon D. Dowell

News from around the regions: Commonwealth of …

A Preliminary Study Of Antibiotic Sensitivity Of Planktonic Bacteria From Cultures Of The Brine Shrimp Artemia Franciscana Kellogg, James R. Rosowski, Eugene D. Ayotte, Julie A. Peterson, Eugene L. Martin

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Great Salt Lake-biotype brine shrimp cysts were added to 440-1 saltwater cultures maintained at 20° ,25° , and 30° C. A micronized corn-byproduct was added each day as food. Planktonic bacteria found during growth of the brine shrimp were enumerated on Plate Count Agar (Difco). From the 25° and 30° brine shrimp cultures, a total of seven prevalent bacterial types (five gram-negative and two gram-positive) were isolated from throughout the 12-day growth cycle. Eight antimicrobial agents were tested against these bacteria, with chloramphenicol the most effective antibacterial agent overall, followed by erythromycin and carbenicillin. The bacterial density of the culture …

Loop Rating Curves From Goodwin Creek, Roger A. Kuhnle, Andrew J. Bowie

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Two types of hysteresis loops have been observed on Goodwin Creek: those with a greater flow depth for a given discharge on the falling limb of the hydrograph (type 1) and those with a greater flow depth for a given discharge on the rising limb of the hydrograph (type 2). Causes of these 2 loop types are investigated in this paper.

Pathogenicity Of Pseudomonas Gladioli Pv. Gladioli On Rhizomatous Iris And Its Possible Role In Iris Scorch, Annie L. Wrobel, John E. Watkins, Don Steinegger

Department of Agronomy and Horticulture: Faculty Publications

Scorch of rhizomatous iris, Iris spp., occurs throughout much of the United States (Black, 1984). It is characterized as a rustcolored browning that starts on the tips of the youngest leaves in the center of the fan. Leaf necrosis progresses downward on the leaves and outward on the fan until the entire fan is affected. Roots shrivel and decay. Root cortical tissue completely deteriorates, but the epidermis and stele remain intact. The rhizome appears unaffected (Wadekamper, 1972).

Because of the sporadic occurrence of scorch and the difficulty of artificially reproducing scorch symptoms, little is known about the etiology, epidemiology, or …

Response Time Of Broiler Chickens To Cimaterol: Meat Tenderness, Muscle Composition, Fiber Size, And Carcass Characteristic, B. L. Gwartney, Steven J. Jones, Chris R. Calkins

Department of Animal Science: Faculty Publications

The response time to cimaterol (CIM), a P-adrenergic agonist, by broiler chickens for carcass characteristics, muscle composition, muscle fiber size, catheptic enzyme activity, and tenderness was determined. Two trials were conducted in which chickens were fed a control diet (CON) containing 0 ppm of CIM or a diet containing 1 ppm of CIM. Trial 1 consisted of 55, 31-d-old broiler chickens individually fed for up to 48 h. At 0, 6, 12, 18, 24, and 48 h, five CON and five CIM-fed chickens were killed. Trial 2 consisted of 160, 33-d-old broiler chickens group-fed for up to 14 d. At …

Circulating Gonadotrophins During A Period Of Restricted Energy Intake In Relation To Body Condition In Heifers, M. S. Roberson, T. T. Stumpf, M. W. Wolfe, Andrea S. Cupp, N. Kojima, L. A. Werth, Roger J. Kittok, J. E. Kinder

Department of Animal Science: Faculty Publications

Beef heifers, 13 months old, were fed to achieve high (7·6 + 0·2 units) or low (3·9 ± 0·1 units) body condition by feeding them one of two diets for 20 weeks. During week 17 of the growth phase, all heifers were ovariectomized. From week 20 to week 27 (restriction phase), all heifers were fed a daily diet containing 0·071 MJ metabolizable energy kg^-1 body weight. At weekly intervals throughout the restriction phase, blood samples were collected at 10-min intervals for 11 h to determine the pattern of secretion of luteinizing hormone (LH), the amount of LH released in …

Exogenous Progesterone And Progestins As Used In Estrous Synchrony Regimens Do Not Mimic The Corpus Luteum In Regulation Of Luteinizing Hormone And 17Β-Estradiol In Circulation Of Cows, N. Kojima, T. T. Stumpf, Andrea S. Cupp, L. A. Werth, M. S. Roberson, M. W. Wolfe, Roger J. Kittok, James E. Kinder

Department of Animal Science: Faculty Publications

Our working hypothesis was that the low concentrations of progesterone (P₄) and synthetic progestins administered in hormonal regimens to control estrous cycles of cows would have similar effects on secretion of LH and 17β-estradiol (E₂). In addition, we hypothesized that concentrations of exogenous P₄ typical of the midluteal phase of the estrous cycle and the corpus luteum (CL) would have similar effects on LH and E₂, and the effects would be different from those of synthetic progestins and low concentrations of P₄. Cows (n = 29) were randomly assigned to one …

Steady-State Amounts Of Α- And Luteinizing Hormone (Lh) Β-Subunit Messenger Ribonucleic Acids Are Uncoupled From Pulsatility Of Lh Secretion During Sexual Maturation Of The Heifer, M. S. Roberson, M. W. Wolfe, T. T. Stumpf, D. L. Hamernik, Andrea S. Cupp, L. A. Werth, N. Kojima, Roger J. Kittok, H. E. Grotjan, J. E. Kinder Kinder.15@Osu.Edu

Department of Animal Science: Faculty Publications

Our primary objective for this study was to determine whether steady-state amounts of α - and LH β-subunit mRNAs in the anterior pituitary are altered during sexual maturation in the bovine female. A secondary objective was to determine whether 17β-estradiol (E₂) alters amounts of LH subunit mRNAs before onset of puberty. Heifers (7 mo old) were assigned to one of three treatments: 1) ovariectomized (OVX, n = 16); 2) OVX and administered E₂ (OVXE, n = 16); or 3) ovary-intact (INTACT, n = 20). Pituitaries were collected at an estimated 120 days before onset of puberty (prepuberty) …

Multiple-Trait Restricted Maximum Likelihood For Simulated Measures Of Ovulation Rate With Underlying Multivariate Normal Distributions, L. Dale Van Vleck, K. E. Gregory

Department of Animal Science: Faculty Publications

A data set that was used to estimate covariance components with REML for an animal model with eight measures of ovulation rate treated as separate traits was used as a template to simulate data sets of eight multivariate normal traits that were then truncated to binomial traits. The model for simulation included eight measures on 610 animals with 1,071 animals in the numerator relationship matrix. Heritabilities were equal for the eight measures, and both genetic and phenotypic correlations among the measures were equal. Ten replications for each combination of heritability (.15, .25, and .35) and genetic correlation (.50, .66 and …

Genetic Variation Liver Mass, Body Mass, And Liver:Body Mass In Mice, L. D. Jones, Merlyn K. Nielsen, R. Britton

Department of Animal Science: Faculty Publications

Genetic variation for liver mass (LM), body mass (BM), and 1iver:body mass (LM/ BM) was examined for outbred populations of laboratory mice. Liver mass and body mass data were collected on 170 pureline sires at 12 wk of age, representing four outbred stocks of laboratory mice; 523 of their male and female two-way cross progeny at 9 or 12 wk; and 214 four-way-cross' offspring at 12, 14, or 16 wk. Genetic differences for LM, BM, and LM/BM were found among the base sire lines and between two-way crosses. Heritabilities and genetic correlations for LM, BM, LM/BM, and LM/MBM (MBM = …

Local Polyploid Variation In The Native Prairie Grass Andropogon Gerardii, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

The microscale distribution of polyploid variants of the dominant grass big bluestem (Andropogon gerardii) in virgin tallgrass prairie was mapped using flow cytometry. The correlation between DNA content and polyploidy allows the use of flow cytometry for nondestructive determination of polyploidy in intact plants. At Konza Prairie, local plots contained from 0 to 100% hexaploid cytotypes but most showed fine-scale mixing of the polyploid variants. The relationship of cytotype frequency to moisture availability or burning history was nonsignificant

The Costs Of Female Choice In A Lekking Bird, Robert M. Gibson, Gwendolyn C. Bachman

School of Biological Sciences: Faculty Publications

We investigated the costs of active female choice in sage grouse, Centrocercus urophasianus, a lekking species in which females make repeated, lengthy visits to leks to assess males before mating. Several potential costs were measured by monitoring changes in hens' ranging behavior, time budgets, and encounter rates with predators when they visited leks. Two costs were identified: hens moved further per day and encountered golden eagles, Aquila chrysaetos, more frequently when visiting leks. However, extra travel due to visiting leks increased predicted daily energetic expenditure by only about 1%, and the risk of predation by golden eagles over …