Digital Commons Network^™

Derivation Of Henderson's Method Of Incorporating Artificial Insemination Sire Evaluations Into Intraherd Prediction Of Breeding Values, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

A derivation is given for the method proposed by Henderson to incorporate evaluations of sires based on daughter records in other herds into the intraherd prediction of breeding values. The derivation consists of pretending the daughters in other herds have records which have been adjusted for the herd-year-season effects of their origin. These equations then are absorbed into the equation for the sire which is tied to both sets of daughters by elements of the inverse of the matrix of relationships.

Effect Of Source Of Pig, Housing System, And Receiving Diet On Performance Of Purchased Feeder Pigs, M. C. Brumm, E. R. Peo, Jr., S. R. Lowry, A. Hogg

Department of Animal Science: Faculty Publications

An experiment was conducted to determine the effect of source of pig, housing system and receiving diet on performance of purchased feeder pigs. Pigs purchased from distant auction markets (DM) gained slower for the first 13 d post-arrival (P<.01, trials 1 and 2) than pigs of similar size purchased from local, one-owner sources (LS).

Testosterone Feedback On Fsh Secretion In Male Sheep, M. J. D'Occhio, B. D. Schanbacher, J. E. Kinder

Department of Animal Science: Faculty Publications

Testosterone-filled Silastic capsules were implanted into mature rams at the time of castration (wethers). After 6 weeks, a tonic pattern of FSH secretion was observed in rams, wethers and wethers implanted with testosterone. Castration caused serum concentrations of FSH to increase 4-5-fold. Relatively low serum concentrations of testosterone (25-50% of intact ram values) did not significantly affect FSH secretion in wethers, but wethers exposed to concentrations of testosterone equivalent to those of intact rams had serum concentrations of FSH similar to those of intact rams. We suggest that testosterone feedback can account for the gross differences in FSH observed between …

Oxidation Rates Of Major Fatty Acids In Fasting Neonatal Pigs, R. D. Boyd, R. A. Britton, H. Knoche, B. D. Moser, E. R. Peo Jr., R. K. Johnson

Department of Animal Science: Faculty Publications

Thirty-two pigs were used to compare the oxidation rates of uniformly labeled (U-14C) palmitic (16:0), stearic (18:0), oleic (18:1) and linoleic (18:2) acids in fasting neonatal pigs. The pigs were allowed to nurse the sow for 24 to 48 h following birth. Subsequently, they were removed, an indwelling catheter was surgically placed in the external iliac vein and the pigs were fasted for 12 h to attain a postabsorptive state. The ¹⁴C fatty acids were administered as a single infusion (10 / μCi) via the catheter, and recovery of the label as expired ¹⁴CO₂ was determined at …

Effect Of Pregnancy On Disease Resistance, Rita C. Manak

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

During pregnancy, the immune response of cattle has an altered potential to overcome infection than during an open period. Several mechanisms seem to control this immune response, and they are being currently researched.

G82-586 Effects Of Agricultural Runoff On Nebraska Water Quality, Elbert C. Dickey, Phillip Harlan, Don Vokal, C.J. Kisling-Crouch

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the effects of agricultural runoff on Nebraska water quality. Methods of controlling agricultural runoff are also examined.

The Federal Water Pollution Control Act Amendments of 1972 and the Clean Water Act of 1977 were written in response to a national concern for decreasing surface and groundwater quality. These laws set 1985 as a target date for eliminating pollutant discharges into navigable waters. An interim goal of the acts calls for "water quality which provides for the protection and propagation of fish, shell fish, and wildlife and provides for recreation in and on the water," where attainable, by …

G82-621 Sources Of Livestock And Poultry Market Information (Revised July 1994), Allen Wellman

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide provides a list of various market information sources, each followed by a brief summary of issue schedules and contents.

It provides a listing of widely used and readily available market information sources that contain information which may be useful to agricultural producers, lenders and agribusiness firms when making livestock and poultry marketing decisions. Most of the available market information and statistical data comes from the U.S. Department of Agriculture (USDA). Many now require an annual subscription fee.

The Probe, Issue 18 - January 1982

The Probe: Newsletter of the National Animal Damage Control Association

THE PROBE National Animal Damage Control Association January, 1982
We must admit the first elections for NADCA did seem a bit rigged as there were only two candidates suggested for Secretary/Treasurer and no opponents for the incumbent RDs in Regions I and VII.
TREASURER'S REPORT FOR 1981.
WHAT PRICE RABIES ?
ADC AND THE RELATED PROFESSIONS
1980 IRS returns
CALLING ALL COYOTES
Eli Lily & Company is supposed to seek registration for this new chemical from EPA this year .
The pallia, a small bird of the honeycreeper family, lives on the upper slopes of Hawaii's dormant volcano, Mauna Kea. …

G620 Pinkeye, Don Hudson, Duane N. Rice

University of Nebraska-Lincoln Extension: Historical Materials

The signs and causes of pinkeye, a painful eye disease that is common in cattle, are covered, as well as control and treatment procedures.

Ec82-872 Revised 1982 Estimated Crop And Livestock Production Costs, H. Douglas Jose, Larry L. Bitney, Douglas D. Duey

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 82-872: Estimated crop and livestock production costs for Nebraska in 1982.

Ec82-130 A 1982 Guide For Herbicide Use In Nebraska, John D. Furrer, Fred W. Roeth, Robert G. Wilson

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 82-130: 1982 Guide for herbicide use in Nebraska.

Impacts Of Technology On U.S. Cropland And Rangeland Productivity, Office Of Technology Assessment

Congressional Research Service Reports

This Nation's impressive agricultural success is the product of many factors: abundant resources of land and water, a favorable climate, and a history of resourceful farmers and technological innovation. We meet not only our own needs but supply a substantial portion of the agricultural products used elsewhere in the world. As demand increases, so must agricultural productivity. Part of the necessary growth may come from farming additional acreage. But most of the increase will depend on intensifying production with improved agricultural technologies. The question is, however, whether farmland and rangeland resources can sustain such intensive use.

Land is a renewable …

G82-590 Feeder Cattle Grades, Keith E. Gilster, H. Dwight Loveday

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes the ten USDA feeder cattle grades.

The purpose of the USDA Feeder Cattle Grades is to sort feeder cattle into similar groups that will facilitate their selling and buying. These grades can also be used for sorting feeder cattle into similar outcome groups in a feedlot. Differences in frame size and muscle thickness score are the basis for the USDA Feeder Cattle Grades.

Feeder cattle are given a grade score that is coded for both frame size (large, medium and small) and thickness (1, 2 and 3). For example, a large frame, thick feeder steer would have …

Management Of Roosevelt Elk Habitat And Harvest, E. E. Starkey, D. S. Decalesta, G. W. Witmer

United States National Park Service: Publications

Historically, Roosevelt elk (Cervus elaphus roosevelti) were distributed from northern California to southern British Columbia in the coastal Pacific Northwest. During the Pleistocene, the subspecies was isolated reproductively from the Rocky Mountain elk (C. e. nelsoni) to the east by the Cascade Mountain Range and by glaciation (Guthrie 1966). Thus Roosevelt elk have adapted to relatively moist forest habitats with maritime climates, while Rocky Mountain elk evolved under the continental climate of the interior.
Unfortunately, less is known of Roosevelt elk biology than of the closely related Rocky Mountain elk east of the Cascades. This has …

Influence Of Energy Intake During Lactation On The Interval From Weaning To First Estrus In Sows, D. E. Reese, B. D. Moser, E. R. Peo, Jr., A. J. Lewis, Dwayne R. Zimmerman, J. E. Kinder, W. W. Stroup, Win Butler

Department of Animal Science: Faculty Publications

A total of 191 crossbred sows were used to determine the effect of energy intake during one lactation on (1) sow and pig performance and (2) the percentage of sows in estrus by 7, 14, 21 and 70 d post-weaning. Sows received 8 (Lo) or 16 (Hi) Meal of metabolizable energy (ME)/d (Exp. 1 and 2) and 8 (Lo), 12 (Md) or 16 (Hi) Meal of ME/d (Exp. 3) during a 28-d lactation period. All sows were fed an equal amount of crude protein, vitamins and minerals that met or exceeded the recommendations of the National Research Council.

Influence Of Energy Intake During Lactation On Subsequent Gestation, Lactation And Postweaning Performance Of Sows, D. E. Reese, B. D. Moser, E. R. Peo, Jr., A. J. Lewis, Dwayne R. Zimmerman, J. E. Kinder, W. W. Stroup, Win Butler

Department of Animal Science: Faculty Publications

Forty-four second parity crossbred sows were used to determine (1) the effect of energy intake during their first lactation (Lac 1) on subsequent reproductive performance from re-breeding to farrowing and (2) the effect of energy intake during two successive lactations on performance during the second lactation (Lac 2) and post-weaning periods. Sows received 8 (Lo) or 16 (Hi) Meal of metabolizable energy (ME)/d during Lac 1 and 5.4 Mcal of ME/d during the subsequent gestation.

Selection For Lean Growth In Swine, Erik R. Cleveland, P. J. Cunningham, E. R. Peo, Jr.

Department of Animal Science: Faculty Publications

Growth rate (ADG) and back fat (BF) data were collected during five generations of selection in two lines of Gene Pool pigs (14-breed synthetic): select (S) and control (C). C were randomly selected, while mass selection was practiced in the S line with an index (I), I = 100 + 286.6 (ADG) - 39.4 (BF). S and C pigs were fed a 14% protein, corn-soybean meal diet from 42 d of age until they reached 79.4 kg.

Individual And Maternal Additive And Heterotic Effects On 205-Day Weight In Beef Cattle, M. D. Macneil, C. A. Dinkel, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Weaning weight records on 47,652 calves in 371 contemporary groups were obtained from the South Dakota Beef Cattle Improvement Association and used to estimate breed individual and maternal additive effects and heterotic effects on 205-d weight. A mixed model was used. Individual additive effects were -22.6 ± 1.3 kg for Red Angus, -19.0 ± 1.1 for Hereford, -12.2 ± .9 for Angus, -11.5 ± 3.1 for Polled Hereford, -10.1 ± 2.2 for Shorthorn, -7.5 ± 4.9 for Tarentaise, 5.3 ± 1.6 for Gelbvieh, 9.5 ± 1.8 for Limousin, 11.4 ± 3.1 for Chianina, 12.4-± 1.2 for Charolais, 14.6 ± 1.2 …

Selection With Restriction In Cattle, E. Niebel, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Application of new and accurate methods of estimating breeding values and systematic selection based on performance characters have increased the complexity of animal breeding. Negative correlations between the most important characters may be involved, especially in the selection of dairy and beef cattle. This problem demands efficient selection models to maximize genetic improvement of some economic traits and simultaneously to restrict other antagonistic traits to a certain genetic change. We have established a general theory of selection indexes with constraints to impose fixed and proportional restrictions when several selection indexes containing different information sources are applied. A detailed description of …

Comparison Of First Lactations And All Lactations Of Dams To Predict Sons’ Milk Evaluations, P. A. Murphy, R. W. Everett, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Multiple regression of genetic evaluations of about 170 Holstein bulls on sire, dam, and maternal grandsire genetic evaluations indicated that the partial regression coefficient for the sire is similar to the theoretical regression coefficient (.45 vs..50), that the regression coefficient for the dam is much smaller than the theoretical regression coefficient when all records of the dam including her first are included in her evaluation (.12 vs..35), although about as expected when only first records of the cow and her herdmates are used (.33 vs..35), and that the regression for the maternal grandsire is larger than expected when his proof …

Monte Carlo Study Of Genetic Groups In Sire Evaluation, T. R. Famula, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Fixed genetic groups have been defined arbitrarily in linear models for sire evaluation. This simulation examined genetic groups under several selection strategies. Sires with highest estimated transmitting abilities were selected to have sons and additional female progeny. The process of evaluation and selection of sires and dams was continued for four generations. Final estimates of transmitting ability were compared to actual transmitting ability for several sire evaluation models on 300 simulated data sets. Genetic groups defined by generation increased the accuracy of estimating sire transmitting abilities over ignoring genetic groups when selected dams and sires of young bulls were mated. …

Components Of Variance Of Dairymen's Workability Traits Among Holstein Cows, K. Agyemang, E. Clapp, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Dairymen of an artificial insemination cooperative subjectively evaluated 5,601 of their cows in first lactation sired by 187 young Holstein bulls for temperament, milking speed, udder, leg and foot problems, and milk production. Exclusive categories were defined for each characteristic. Individual categories were separate traits, and components of variance and covariance were estimated for herd-year of measurement, sire of cow, and residual effects. Variance from sire of cow was less than 3% of the total for all traits so that heritabilities within herd-year were less than .12 for every trait. Variances and covariances were used in a multiple trait sire …

Relationships Among Sires In Estimating Genetic Variance, L. Dale Van Vleck, G. F. S. Hudson

Department of Animal Science: Faculty Publications

A method to account for relationships among sires in estimating covariance among paternal half-sibs and heritability is described. The reduction in sum of squares from fitting sire effects after eliminating all other effects in the model is divided by the sum of products of elements of the matrix of coefficients after absorption and elements of the matrix of relationships among sires rather than by the trace of the matrix of coefficients. The method requires computation of relationships that for many sires may be difficult.

Theoretical Weights For Regression Of A Son's Genetic Evaluation On His Sire's And His Dam's Genetic Evaluations, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Theoretical weights for prediction of a son's genetic evaluation from genetic evaluations of his sire and dam are derived. Weights for sire and dam are equal and depend on number of daughters of the son when the bull evaluation is from his daughters alone and cow evaluation is from her records alone. Mixed model procedures which incorporate records of other relatives change theoretical weights. When records of daughters of both the son and his sire are used in evaluations of both, theoretical weights for the sire to predict the son's evaluation are about .50 for many combinations of daughter numbers …

Effect Of Tallow And Choline Chloride Addition To The Diet Of Sows On Milk Composition, Milk Yield And Preweaning Pig Performance, R. D. Boyd, B. D. Moser, E. R. Peo Jr., A. R. Lewis, R. K. Johnson

Department of Animal Science: Faculty Publications

Four trials were conducted with a total of 188 crossbred sows to determine the effect of feeding diets supplemented with tallow (0 or 8%) and choline chloride (220 or 770 mg/kg diet) prior to parturition and during lactation on preweaning pig performance. On d 100 of gestation, sows were allotted to four factorially arranged dietary treatments: 0% tallow-220 mg/kg choline chloride, 0% tallow-770 mg/kg choline chloride, 8% tallow-220 mg/kg choline chloride, 8% tallow-770 mg/kg choline chloride. Diets without tallow were fed at the rate of 1.82 kg/d with an additional .18 kg/d of cornstarch, whereas sows receiving diets supplemented with …

Utilization Of The Intact Male For Red Meat Production: A Review, S. C. Seideman, H. R. Cross, R. R. Oltjen, B. D. Schanbacher

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

Castration has long been a traditional practice in the United States. Research studies indicate that intact males grow more rapidly, utilize feed more efficiently and produce a higher-yielding carcass with less fat and more edible product. The disadvantages of the intact male include aggressive behavior (bull and boar); undesirable odors and flavors (boar and ram); lower quality grade (bull); lower meat tenderness (bull and ram) and undesirable meat color (bull and ram). Research is needed to develop antemortem and(or) postmortem handling procedures that offset the disadvantages of the intact male so that the meat and livestock industry can take advantage …

Effects Of Contrasting Photoperiods And Temperatures On Performance Traits Of Confinement-Reared Ewe Lambs, B. D. Schanbacher, G. L. Hahn, J. A. Nienaber

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

The effects of contrasting photoperiods (16L:8D vs 8L: 16D) and ambient temperatures (5 C vs 18 C vs 31 C) on performance traits of ewe lambs have been evaluated. Seventy-two lambs were paired and allotted to one of six treatment groups in a 2 • 3 factorial experiment. The lambs were fed a pelleted diet ad libitum. throughout the 14-wk study (i.e., as Iambs progressed from 12 to 26 wk of age). "Analysis of performance and carcass data showed that both photoperiod and temperature affected growth rate (P.05) by treatment. Whereas serum prolactin concentrations were elevated in lambs exposed to …

Podcan Final Program: 1982 Annual Conference

Professional and Organizational Development Network in Higher Education: Conference Materials

1982 Annual POD Conference Planning Committee

Welcome to 1982 Conference Professional and Organizational Development Network

General Information

Conference Activities

Planning Sheet

Santa Fe Taos, Donald Bartlett Doe

Sheldon Museum of Art: Catalogs and Publications

Few artists' colonies have richer legacies than those of Santa Fe and Taos. Much of that Southwest tradition is represented in the collections of the Sheldon Memorial Art Gallery. For that reason alone, it seems especially right that the Sheldon organize this exhibition of contemporary art from Northern New Mexico. There are, of course, other connections. Recently, the Sheldon mounted an exhibition of the work of Georgia O'Keeffe. Bernard Plossu, Joan Myers, and William Clift, all photographers working in New Mexico, have recently been exhibited here. In sum, the Sheldon's collections and exhibition calendars reflect the vitality of art from …

1982 Annual Report

Southeast Research and Extension Center: Reports and Administration

1982 was a year of challenges for all the various members of our unit including the researcher, the extension worker, the forester, and all the support staff. Our program year started on October 1, 1981 and ended on September 30, 1982.

From the agriculture standpoint, it has been a difficult year. The fall of 1981 was not favorable to the agricultural producer. Rain, freezing temperatures and even light snow was prevalent in October, 1981. Throughout the winter of 91-82, it was cold and snow was on the ground most of the winter.

It was not uncommon for counties in the …