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Animal Industry Report

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Corn Silage And Earlage Nutrient Analysis, Russ Euken Jan 2018

Corn Silage And Earlage Nutrient Analysis, Russ Euken

Animal Industry Report

Corn Silage and earlage are two common feeds for beef cattle. Both of these feeds can increase beef production per acre as compared to corn grain but require good management from production through feeding to optimize beef production. Variation in the production, harvesting and storage of these feeds could influence the nutrient analysis and beef production.


Effect Of Varying Trace Mineral Supplementation Of Steers With Or Without Hormone Implants On Growth And Carcass Characteristics, Emma Niedermayer, Olivia Genther-Schroeder, Dan Loy, Stephanie Hansen Jan 2018

Effect Of Varying Trace Mineral Supplementation Of Steers With Or Without Hormone Implants On Growth And Carcass Characteristics, Emma Niedermayer, Olivia Genther-Schroeder, Dan Loy, Stephanie Hansen

Animal Industry Report

The utilization of hormone implants and the supplementation of trace minerals have become well adopted management strategies in the feedlot industry. When hormone implants increase rates of growth in feedlot cattle, this could increase the demand for trace minerals to support those rapid rates of growth. In this study, an aggressive implant strategy dramatically increased growth rates and HCW, without having negative effects on marbling score. It was also observed, regardless of hormone implant, trace mineral supplementation tended to increase overall ADG and steers supplemented at industry consultants recommended concentrations had a 33 lb increase in HCW compared to cattle ...


Iowa State University Department Of Animal Science Undergraduate Teaching Update, Jodi Sterle Jan 2018

Iowa State University Department Of Animal Science Undergraduate Teaching Update, Jodi Sterle

Animal Industry Report

For the first time in eleven years, undergraduate student enrollment in the Animal Science department decreased slightly. A total of 1,078 undergraduate students were enrolled as Animal Science, Dairy Science and General Pre-Veterinary Medicine majors fall semester 2017. Placement numbers remain high, with over 97% of graduates either entering graduate or professional school or gaining employment within six months of graduation. Undergraduate student enrollment in the Department of Animal Science reached a record in 2016 with 1131 students.


Empirical Progeny Equivalent Of Genotyped Animals In A Multi-Breed Beef Cattle Genetic Evaluation Using A Single-Step Bayesian Regression Model, Mahdi Saatchi, Rohan L. Fernando, Lauren Hyde, Jackie Atkins, Steve Mcguire, Wade Shafer, Matt L. Spangler, Bruce Golden Jan 2018

Empirical Progeny Equivalent Of Genotyped Animals In A Multi-Breed Beef Cattle Genetic Evaluation Using A Single-Step Bayesian Regression Model, Mahdi Saatchi, Rohan L. Fernando, Lauren Hyde, Jackie Atkins, Steve Mcguire, Wade Shafer, Matt L. Spangler, Bruce Golden

Animal Industry Report

The objective of this study was to measure the accuracies of genomic enhanced EPDs of genotyped animals in an international multi-breed beef cattle genetic evaluation using single-step Bayesian regression model. The average Breed Improvement Federation (BIF) accuracies of genotyped animals with no progeny information compared to the average BIF accuracies of non-genotyped sires with different number of progenies with observed phenotypes. The results show that the BIF accuracy of a genotyped animal is equivalent to the BIF accuracy of a non-genotyped sire with 21, 22 and 24 progeny with observed phenotypes for birth, weaning and yearling weights, respectively. The empirical ...


Observations Regarding Depressed Cholinesterase In Beef Cattle After Feeding Contaminated Corn Silage, Garland Dahlke Jan 2018

Observations Regarding Depressed Cholinesterase In Beef Cattle After Feeding Contaminated Corn Silage, Garland Dahlke

Animal Industry Report

Beef cattle fed corn silage with an unidentified mycotoxin or possibly some other metabolite expressed a great decline in blood and brain cholinesterase activity. The presence of the ionophore in the ration appeared to make the depression much more severe initially and although blood cholinesterase levels did rebound somewhat after a period of time, brain cholinesterase levels did not recover to what would be considered normal even though the ionophore was removed from the ration.


Development Of A Crush Margin Calculator For Beef And Pork Markets, Dinesh Reddy Poddaturi, Garland Dahlke, Russ Euken, Lee Schulz Jan 2018

Development Of A Crush Margin Calculator For Beef And Pork Markets, Dinesh Reddy Poddaturi, Garland Dahlke, Russ Euken, Lee Schulz

Animal Industry Report

A convenient, web-based application was developed that utilizes Chicago Mercantile Exchange (CME) futures settlement price data to generate an expected margin. Futures price data is available for live cattle, feeder cattle, lean hogs, soybean meal, and corn. The prices of these commodities on the futures market can be hedged in advance of cash purchases or sales to reduce price risk or used to estimate potential margins when producing and selling fed cattle or market hogs.


Genetic Parameters And Genomic Regions Associated With Growth Rate And Response To Newcastle Disease In Local Chicken Ecotypes In Ghana And Tanzania, Esinam Nancy Amuzu-Aweh, Muhammed Walugembe, Boniface Baboreka Kayang, Amandus Pachificus Muhairwa Jan 2018

Genetic Parameters And Genomic Regions Associated With Growth Rate And Response To Newcastle Disease In Local Chicken Ecotypes In Ghana And Tanzania, Esinam Nancy Amuzu-Aweh, Muhammed Walugembe, Boniface Baboreka Kayang, Amandus Pachificus Muhairwa

Animal Industry Report

Local chicken enterprises in Africa are of great importance to household livelihoods but face major constraints with devastating disease outbreaks such as Newcastle disease (ND), which cause major economic losses. A study was conducted in two countries, Ghana and Tanzania, where three ecotypes in each country were challenged with a lentogenic (vaccine) strain of ND virus and various response phenotypes, including growth, anti-NDV antibody levels, and viral load from hatch to 38 days of age were taken. We estimated variance components and performed a genome-wide association study (GWAS) using ~2800 birds. Moderate heritabilities (0.14-0.55) of the above traits ...


2017 Fall Dairy Tour, Jennifer Bentley, Mariah Schmitt Jan 2018

2017 Fall Dairy Tour, Jennifer Bentley, Mariah Schmitt

Animal Industry Report

The second annual Fall Dairy Tour provided a two day, one-night learning opportunity for producers, industry, and potentially new dairy producers to network and learn more about the industry. These tours showcased farms and industry that have seen success in advancing and utilizing genetics, implementing technology, and facility design for improved herd health and efficiency.


International Engagement To Enhance Global Food Security: An Example In The Republic Of Kosova, Curtis R. Youngs, Albulena Basha Jan 2018

International Engagement To Enhance Global Food Security: An Example In The Republic Of Kosova, Curtis R. Youngs, Albulena Basha

Animal Industry Report

Since 2011, personnel at Iowa State University (ISU) have been engaged with the southeastern European country of the Republic of Kosova (more commonly known as Kosovo). The purpose of this engagement has been to empower Kosovars to transform their agricultural sector so that this newly independent country can reduce its reliance on food imports and develop into a food secure nation. Activities conducted under terms of the international memorandum of cooperation and understanding between ISU and the University of Prishtina (UP) are described in this report. Accomplishments resulting from this partnership include: 1) guest lectures by ISU faculty to UP ...


Selection For Increased Natural Antibody Levels To Improve Disease Resilience In Pigs, Laura E. Tibbs, Carolyn Ashley, Austin Putz, Kyu-Sang Lim, Michael K. Dyck, Frederic Fontin, Graham S. Plastow, Jack Dekkers, John C. S. Harding Jan 2018

Selection For Increased Natural Antibody Levels To Improve Disease Resilience In Pigs, Laura E. Tibbs, Carolyn Ashley, Austin Putz, Kyu-Sang Lim, Michael K. Dyck, Frederic Fontin, Graham S. Plastow, Jack Dekkers, John C. S. Harding

Animal Industry Report

Breeding animals are typically raised under high health conditions in nucleus herds, but their offspring are often exposed to multiple disease challenges in commercial production facilities. Because breeding animals are not exposed to many common swine pathogens, it is difficult to select for resilience to disease. A possible solution is selecting for levels of natural antibodies (NAb), which can be measured in a high health environment and in this study are shown to correlate with disease resilience and to be heritable (h2 = 0.11 to 0.39). Therefore, breeding for increased NAb levels in clean conditions could be a valuable ...


Comparison Of Trace Mineral Repletion Strategies In Beef Cattle To Overcome A High Antagonist Diet, Sarah Hartman, Olivia Genther-Schroeder, Stephanie Hansen Jan 2018

Comparison Of Trace Mineral Repletion Strategies In Beef Cattle To Overcome A High Antagonist Diet, Sarah Hartman, Olivia Genther-Schroeder, Stephanie Hansen

Animal Industry Report

It was observed that diets with high sulfur and molybdenum decreased markers of copper, selenium, and manganese after 90 d. In a 62-d trace mineral repletion period, steers receiving an injection of Multimin90 had the most rapid improvement of copper and selenium status by d 14, while it took 28 d and 42 d for copper and selenium status to improve in steers supplemented with 150% of national recommended concentrations from either an inorganic and organic blend, or only inorganic trace minerals. Further research is needed to understand the optimal trace mineral supplementation strategy to overcome dietary antagonisms without creating ...


Behavioral Associations During A Novel Object Test And Performance Of Barrows Divergently Selected For Residualfeed Intake, Samaneh Azarpajouh, Jessica Colpoys, Emily Arkfeld, Nicholas Gabler, Anna Johnson, Jack Dekkers, Elisabeth Huff-Lonergan, Steven Lonergan, John Patience, Kenneth Stalder Jan 2018

Behavioral Associations During A Novel Object Test And Performance Of Barrows Divergently Selected For Residualfeed Intake, Samaneh Azarpajouh, Jessica Colpoys, Emily Arkfeld, Nicholas Gabler, Anna Johnson, Jack Dekkers, Elisabeth Huff-Lonergan, Steven Lonergan, John Patience, Kenneth Stalder

Animal Industry Report

Selection for decreased RFI is controversial from a welfare standpoint, given that the genetic variation in RFI reflects the genetic variation in activity and response to stress. The objective of this experiment was to examine the behavioral metric correlations and growth performance of barrows divergently selected for residual feed intake (RFI) during a novel object test. Forty low-(LRFI, more feed efficient) and 40 high-RFI (HRFI, less feed efficient) barrows from the 8th generation Yorkshire selection lines were randomly selected. Barrows were evaluated in a Novel Object Test for zone crossing, zone 1 (defined as the mouth, nose, and/or ...


How Does The Type Of Vaccine Affect Pig Approachability Pre- And Post-Vaccination?, Shawna Weimer, Anna Johnson, Kenneth Stalder, Locke Karriker, Thomas Fangman Jan 2018

How Does The Type Of Vaccine Affect Pig Approachability Pre- And Post-Vaccination?, Shawna Weimer, Anna Johnson, Kenneth Stalder, Locke Karriker, Thomas Fangman

Animal Industry Report

The objective of this study was to determine if nursery pigs display different behaviors and postures pre- and post-injection using a live- and digital image methodology. A total of 149 pens housing approximately 19 barrows and gilts/pen (a mix of approximately 50% barrows and 50% gilts; 0.3 m2/pig) were used. Barrows and gilts were approximately 6-wk of age from a commercial crossbred genetic line. The pen applied injection treatments were (1) Ingelvac CircoFLEX®/Ingelvac MycoFLEX® vaccine, (2) Circumvent® PCVM vaccine (3) Saline. Pre-injection were conducted at 1600h the day before injections were administered. Pigs received their treatments ...


Iowa Beef Center, Dan Loy, Beth Doran, Russ Euken, Denise Schwab, Chris Clark, Joe Sellers, Patrick Wall, Garland Dahlke, Sherry Hoyer, Erika Lundy, Lee Schulz, Grant Dewell Jan 2018

Iowa Beef Center, Dan Loy, Beth Doran, Russ Euken, Denise Schwab, Chris Clark, Joe Sellers, Patrick Wall, Garland Dahlke, Sherry Hoyer, Erika Lundy, Lee Schulz, Grant Dewell

Animal Industry Report

During 2016, IBC staff made 183 presentations to more than 13,700 participants, conducted 564 personal consultations, and over 4,100 phone or email consultations. The webinars and videos IBC produced were viewed more than 20,000 times, and the online software tools had 375,000 downloads. There were 180,000 website visitors and 3,500 social media contacts. IBC funded 4 mini grant projects investigating current industry questions including: Management effects on ergovaline content of stockpiled tall fescue for winter grazing • Grazing cover crops • Calving management on Iowa beef cattle farms • Corn silage characteristics on Iowa farms Iowa Beef ...


Effects Of Original Xpc On Newly Weaned Beef Steer Nutrient Digestibility And Response To A Vaccination Challenge, Erin Deters, Rebecca Stokes, Olivia Genther-Schroeder, Stephanie Hansen Jan 2018

Effects Of Original Xpc On Newly Weaned Beef Steer Nutrient Digestibility And Response To A Vaccination Challenge, Erin Deters, Rebecca Stokes, Olivia Genther-Schroeder, Stephanie Hansen

Animal Industry Report

The study was designed to determine the effects of Diamond V Original XPC, a yeast fermentation product, in the diets of newly weaned beef steers on nutrient digestibility and response to a vaccination challenge. Although no overall performance benefit was noted, XPC improved total tract CP digestibility. Steers fed XPC at 14 g/d exhibited lesser concentrations of APP, greater DMI, and more efficient rumination post-vaccination. Further research is needed to determine the optimal supplementation rate of XPC to newly received beef cattle.


Air Emissions Mitigation From Aviary Cage-Free Hen Litter, Lilong Chai, Hongwei Xin, Yang Zhao, Tong Wang, Michelle Soupir Jan 2018

Air Emissions Mitigation From Aviary Cage-Free Hen Litter, Lilong Chai, Hongwei Xin, Yang Zhao, Tong Wang, Michelle Soupir

Animal Industry Report

Spraying water or electrolyzed water (EW) has been tested to reduce animal house dust level. In this study, lab-scale experiment was conducted to mitigate particulate matter (PM) emissions of litter from aviary cage-free hen houses by spraying EW. The results showed that higher spray dosage led to greater PM reduction (PM reduction of 71%, 81% and 89% immediately after EW spray at 25, 50, 75 mL per kg dry-basis litter or 3, 6, and 9 gal per 1000 ft2 at 0.4 inch (1 cm) litter depth, respectively) but higher ammonia (NH3) emissions. To address this issue, solid litter additive ...


Siouxland Dairy Lenders Seminar Focus On Dairy Enterprise Issues, Fred M. Hall, Larry Tranel Jan 2018

Siouxland Dairy Lenders Seminar Focus On Dairy Enterprise Issues, Fred M. Hall, Larry Tranel

Animal Industry Report

Agricultural lenders in the six Northwest Iowa counties serve over 100 dairymen, representing production from over 57,000 cows. Add to that Siouxland producers in the surrounding states and the numbers double. A review of programing for dairy lenders in Siouxland found that little programing had been directed to dairy lenders specifically in recent years. With the stresses of low milk prices, variable feed prices and high land prices, lenders were often using dated budgets and formulas to evaluate profitability of dairy enterprises. A Dairy Lenders Seminar for the Siouxland area was developed based on the Tri- State Lenders Conference ...


Egg Flats And Pallets Disinfection With Heat Treatment, Lilong Chai, Hongwei Xin, Yang Zhao, Brad Richardson Jan 2018

Egg Flats And Pallets Disinfection With Heat Treatment, Lilong Chai, Hongwei Xin, Yang Zhao, Brad Richardson

Animal Industry Report

Sanitation of egg flats and pallets may be done by heating them up above 130 ºF and maintaining the high temperature for a period of time (e.g., 6-8 h). To assess the heating performance of a newly built heat treatment room at a commercial layer farm in wintertime (December) in Iowa, temperature of room air and inside the stacked pallets and flats were monitored during the heating process. Preliminary results show that directing heat more toward the floor improved the room heating effect greatly; the room air and pallet stacks temperature reached the target zone (130-140ºF) 30 min and ...


A Strategy For Undergraduate Student Development In Animal Science, Jodi Sterle, Jennifer Bundy Jan 2018

A Strategy For Undergraduate Student Development In Animal Science, Jodi Sterle, Jennifer Bundy

Animal Industry Report

The Department of Animal Science at Iowa State University has experienced a tremendous increase in undergraduate enrollment in the past decade, yet the placement rate of graduates remains at almost 98%. While the industry continues to expand its demand for qualified graduates, this placement rate is not accomplished by chance or without a strategy. This strategy is put into place during the prospective student visit which often occurs during the student’s junior or senior year of high school, and continues throughout their career at Iowa State University.


Iowa Dairy Enterprise Budgets, 2018, Larry Tranel Jan 2018

Iowa Dairy Enterprise Budgets, 2018, Larry Tranel

Animal Industry Report

No abstract provided.


The Animal And Dairy Science Learning Community Assists Students With Acclimation To Iowa State University, Jennifer Bundy Jan 2018

The Animal And Dairy Science Learning Community Assists Students With Acclimation To Iowa State University, Jennifer Bundy

Animal Industry Report

Learning communities at Iowa State University (ISU) are designed to help new students become accustomed to campus, get to know their peers, and develop an immediate support group within their major. The Animal and Dairy Science Learning Community consists of small groups of students that share the same adviser, interests, and background. These students take one to three classes together and form study teams. Groups are led by a peer mentor who is familiar with the department, curriculum, and university resources. Peer mentors must have sophomore status and be in good academic standing. The peer groups meet in coordination with ...


Midwest Dairy Day Focuses On Maximizing Production With Improved Reproduction, Jennifer Bentley, Mariah Schmitt, Kyra Bellrichard Jan 2018

Midwest Dairy Day Focuses On Maximizing Production With Improved Reproduction, Jennifer Bentley, Mariah Schmitt, Kyra Bellrichard

Animal Industry Report

The Midwest Dairy Day provides a one day learning opportunity for producers, industry, and potentially new dairy producers to network and engage in a current topic. With support from the dairy industry and business community, Iowa State University Extension and Outreach, Northeast Iowa Community College, and Northeast Iowa Dairy Foundation, this program has continued to provide valuable information.


Academic Advising Strategies To Support Undergraduate Student Success, Jennifer Bundy, Jodi Sterle Jan 2018

Academic Advising Strategies To Support Undergraduate Student Success, Jennifer Bundy, Jodi Sterle

Animal Industry Report

Undergraduate academic advising is an integral part of the student experience at Iowa State University (ISU). The Animal Science department at ISU relies almost solely on faculty members to advise and mentor undergraduate students as part of their teaching responsibilities. Incoming freshmen are matched with advisers based on their interests, career paths, and backgrounds before starting their first semester at ISU. Transfer students are initially placed with a transfer coordinator who is well versed in transfer credit evaluations and policies. Ideally, students will stay with the same adviser throughout their academic career, but they are given the option to request ...


Energy Digestibility Of A High Protein Ddgs Product In Broilers, Krysten Fries, Elizabeth Bobeck Jan 2018

Energy Digestibility Of A High Protein Ddgs Product In Broilers, Krysten Fries, Elizabeth Bobeck

Animal Industry Report

Changes to the production method of distiller’s dried grains with solubles (DDGS), a common feedstuff in poultry diets, can alter the nutrient profile and energy content. Estimates of DDGS digestibility vary as a result of the altered production method, removal of value-added products like distiller’s corn oil, as well as the strain of chicken used (broiler vs. layer). The objective of this study was to determine the energy digestibility of high protein DDGS (HiP DDGS) fed to straight-run Cobb 500 broiler chickens. The apparent nitrogen-corrected metabolizable energy of HiP DDGS was calculated at 2,710 kcal/kg. Additional ...


Six Year Summary Of Foliar Fungicide Use In Alfalfa Production, Brian Lang, Ken Pecinovsky Jan 2018

Six Year Summary Of Foliar Fungicide Use In Alfalfa Production, Brian Lang, Ken Pecinovsky

Animal Industry Report

The best probability of achieving an economic response to a foliar fungicide application in alfalfa production is to first crop. Other than that, we need to be more selective of our opportunities for an economic return based on scouting, yield potential, environmental conditions and alfalfa forage value. To apply fungicides to alfalfa without consideration for yield potential of individual cuttings or environments favorable to disease development would not follow proper stewardship of pesticide use nor result in maximizing


Automatic Calf Feeder Field Day Enhances Calf Management, Jenn Bentley Jan 2018

Automatic Calf Feeder Field Day Enhances Calf Management, Jenn Bentley

Animal Industry Report

Precision management in calf care is needed as there are many ways to add value to these heifers before they join the milking string. A one-day workshop was hosted on August 31, for a first-hand look at how fellow dairy farmers are housing pre-weaned calves using technology to help manage their calf program. These included automatic calf feeders, pasteurizers, and milk cooling systems. Areas of focus included basic sanitation for automatic calf feeders, equipment hygiene, and housing and ventilation.


Novel Resilience Phenotypes From A Natural Disease Challenge Model For Wean-To-Finish Pigs, Austin M. Putz, John C.S. Harding, Michael K. Dyck, Frédéric Fontin, Graham S. Plastow, Jack C. M. Dekkers Jan 2018

Novel Resilience Phenotypes From A Natural Disease Challenge Model For Wean-To-Finish Pigs, Austin M. Putz, John C.S. Harding, Michael K. Dyck, Frédéric Fontin, Graham S. Plastow, Jack C. M. Dekkers

Animal Industry Report

Novel phenotypes from a commercial testing system could add value to selection for resilience to disease and other stressors beyond simply collecting mortality. Day-to-day variability in feed intake (FI) and in duration at the feeder (DUR), quantified by root mean squared errors (RMSE), were investigated as novel measures of resilience using data from grow-finish pigs in a natural disease challenge facility. • RMSE of FI and DUR were moderately heritable • RMSE of FI and DUR showed moderate to strong genetic correlations with mortality and treatments These results show that day-to-day variation in FI and DUR in a challenge environment can be ...


Tri-State Dairy Youth Expo Hones In On Dairy Judging Skills, Jennifer Bentley, Ron Lenth Jan 2018

Tri-State Dairy Youth Expo Hones In On Dairy Judging Skills, Jennifer Bentley, Ron Lenth

Animal Industry Report

Tri-State Dairy Youth Expo has been a long standing program that has been in existence since the early 1980’s. A donation from the Iowa State Dairy Association allowed a group to develop the Iowa Dairy Expo, now known as Tri-State Dairy Youth Expo. It began in 1984 at the Waterloo Cattle Congress as a dairy cattle judging show with commercial exhibits and informational seminars targeted mainly at dairy producers. As dairy farms changed and Iowa saw a decrease in dairy farms, the dairy sale diminished and locations changed from Waterloo to Dubuque to Decorah, and eventually to Calmar, Iowa ...


Secure Milk Supply (Sms) Plan For Continuity Of Business, Danelle Bickett-Weddle Jan 2018

Secure Milk Supply (Sms) Plan For Continuity Of Business, Danelle Bickett-Weddle

Animal Industry Report

The Secure Milk Supply (SMS) Plan provides a workable continuity of business (COB) plan for dairy premises with no evidence of foot and mouth disease (FMD) infection in a regulatory Control Area to move raw milk to processing that is credible to Responsible Regulatory Officials (local, state, tribal, and federal officials, as appropriate). Officials must balance the risks of allowing movement of raw milk against the risk of not allowing movement and thus the necessity for on farm disposal of raw milk. FMD is a highly contagious foreign animal disease that infects cattle and other cloven-hooved livestock, such as swine ...


The Effect Of Prrsv Vaccination And Wur Genotype On The Gene Expression Profile In Blood Of Nursery Pigs Following Co-Infection With Prrsv And Pcv2b, Qian Dong, Joan Lunney, Yet Nguyen, Christopher Tuggle, Bob Rowland, James Reecy, Jack Dekkers Jan 2018

The Effect Of Prrsv Vaccination And Wur Genotype On The Gene Expression Profile In Blood Of Nursery Pigs Following Co-Infection With Prrsv And Pcv2b, Qian Dong, Joan Lunney, Yet Nguyen, Christopher Tuggle, Bob Rowland, James Reecy, Jack Dekkers

Animal Industry Report

Previous results have shown that pigs that were vaccinated (Vac) with a porcine reproductive and respiratory syndrome (PRRS) modified live virus (MLV) had lower PRRS viral load (VL) but higher porcine circovirus 2b (PCV2b) VL following co-infection with PRRSV and PVC2b than non-vaccinated (nonVac) pigs. In this study, we identified differentially expressed genes (DEGs) at 4 and 7 days post infection (dpi) between Vac and nonVac (VacStatus) pigs. Five DEGs were predicted to decrease replication of PRRSV at 7 dpi in Vac pigs, which may relate to the partial protective effect of the vaccine against PRRS. Other DEG at 4 ...