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Perceptions And Usage Of Communication Tools By Nebraska Cattle Producers, Jaclyn F. Tweeten, Thomas H. Paulsen Jan 2014

Perceptions And Usage Of Communication Tools By Nebraska Cattle Producers, Jaclyn F. Tweeten, Thomas H. Paulsen

Animal Industry Report

Communication is an important aspect of agriculture. Beef producers have access to a number of communication tools. It is important to study beef producers perceptions and usage of communication tools so that beef industries can effectively communicate with beef producers. This study examines the perceptions regarding the importance and frequencies of communication tools used by beef producers. Results indicate that beef producers, specifically Nebraska Cattlemen board of directors, prefer print and electronic media sources over social media sources for both general and beef industry information. Since social media was the least important communication tool used in this study one could ...


Fecal Starch Content And Apparent Starch Digestibility Using Field Methods In Feedlot Cattle Fed 25, 50, Or 75% Modified Distillers Grains With Solubles, Daniel D. Loy, Paul Summer, Allen H. Trenkle, Darrell Busby, Zeb Gray, Erika L. Lundy, Stephanie L. Hansen Jan 2014

Fecal Starch Content And Apparent Starch Digestibility Using Field Methods In Feedlot Cattle Fed 25, 50, Or 75% Modified Distillers Grains With Solubles, Daniel D. Loy, Paul Summer, Allen H. Trenkle, Darrell Busby, Zeb Gray, Erika L. Lundy, Stephanie L. Hansen

Animal Industry Report

Recent cattle feeding economics in the upper Midwest have encouraged increasing inclusion of distillers grains in feedlot rations. There have been suggestions that changes in grain processing may be beneficial as starch content of the diet decreases. Recently methods have been developed to estimate fecal starch digestibility in field studies using fecal protein as a marker. An estimate of fecal starch digestibility across a wide range of distillers grain inclusion and starch levels would be useful information to evaluate the utility of more extensive grain processing. This study was an evaluation of field estimates of fecal starch digestion as part ...


Genome-Wide Association Study Of Feed Efficiency In Beef Cattle, Mahdi Saatchi, Dorian J. Garrick, Jeremy Taylor Jan 2014

Genome-Wide Association Study Of Feed Efficiency In Beef Cattle, Mahdi Saatchi, Dorian J. Garrick, Jeremy Taylor

Animal Industry Report

Feed costs comprise the majority of beef production costs and feed intake has long been recognized as an economically relevant trait for beef cattle. Residual feed intake (RFI) is a function of feed intake and performance and reflects whether animals eat more or less than expected for a given level of production. The objectives of this study were to map quantitative trait loci (QTL) associated with feedlot RFI in 4 different beef cattle populations. A total of 13 significant QTL over 10 different chromosomes were detected. The identified QTL had no overlap across 4 beef cattle populations reflecting different genetic ...


Ontology Development And Its Utility In Qtl Data Annotation, Carissa A. Park, Zhiliang Hu, James M. Reecy Jan 2014

Ontology Development And Its Utility In Qtl Data Annotation, Carissa A. Park, Zhiliang Hu, James M. Reecy

Animal Industry Report

Two ontologies have been developed to characterize traits in vertebrate species. The Vertebrate Trait Ontology (VT) is a vocabulary of terms describing measurable or observable characteristics related to the morphology, physiology, or development of vertebrates. The livestock Product Trait Ontology (PT) defines those characteristics relevant to products produced by or obtained from animals maintained for use and/or profit. Both ontologies are being used to annotate data in the Animal QTL Database, providing a common basis for comparisons across databases or between species. The VT and PT will benefit the livestock production industry by implementing standardized trait nomenclature to enhance ...


Effect Of Slow And Rapid Peroxidation Of Corn Oil On The Performance And Energy Storage Of Broiler Chicks, Isa J. Ehr, Brian J. Kerr, Michael E. Persia Jan 2014

Effect Of Slow And Rapid Peroxidation Of Corn Oil On The Performance And Energy Storage Of Broiler Chicks, Isa J. Ehr, Brian J. Kerr, Michael E. Persia

Animal Industry Report

The extraction of corn oil from DDGS has led to an increase in the utilization of coil oil in poultry diets. This corn oil has the opportunity to undergo peroxidation during storage or processing. Therefore it is important to understand the effects of peroxidation of corn oil on growth and performance of broiler chicks. Broiler chicks were provided corn-soybean based diets containing unperoxidized corn oil (UPO), slowly peroxidized corn oil (SO; heated for 72 h at 95ᵒC), and rapidly peroxidized corn oil (RO; heated for 7 h at 185ᵒC). Corn oil was added at a 5% inclusion 0- 14 d ...


Effects Of Increasing Concentrations Of Corn Dried Distiller’S Grains With Solubles On The Egg Production And Internal Quality Of Eggs, Hongyu Sun, Eun Joo Lee, Himali Samaraweera, Michael E. Persia, Dong U. Ahn Jan 2014

Effects Of Increasing Concentrations Of Corn Dried Distiller’S Grains With Solubles On The Egg Production And Internal Quality Of Eggs, Hongyu Sun, Eun Joo Lee, Himali Samaraweera, Michael E. Persia, Dong U. Ahn

Animal Industry Report

Four diets were formulated to contain 0, 17, 35 or 50% corn DDGS. A total of 240 54-week-old single-comb White Leghorn laying hens were assigned to one of four dietary treatments and fed for a 24-week experimental period. Two sets of the experimental diets were formulated and each diet was fed for 12 weeks. Egg production, feed consumption, egg component, yolk color, Haugh unit during storage times, and shell breaking strength were measured. Egg production, egg weight, egg mass, feed intake, and feed efficiency were adversely affected by the highest level of DDGS in the diet (50%) during the first ...


Pigs Selected For Increased Feed Efficiency Are Less Affected By Experimental Infection With The Prrs Virus, Jenelle R. Dunkelberger, Nicholas Boddicker, Jennifer Young, Dinesh M. Thekkoot, Bob Rowland, Jack C. M. Dekkers Jan 2014

Pigs Selected For Increased Feed Efficiency Are Less Affected By Experimental Infection With The Prrs Virus, Jenelle R. Dunkelberger, Nicholas Boddicker, Jennifer Young, Dinesh M. Thekkoot, Bob Rowland, Jack C. M. Dekkers

Animal Industry Report

Analyses of average daily gain (ADG) and viral load (VL) suggest that selection for increased feed efficiency based on residual feed intake (RFI) does not increase the impact of Porcine Reproductive and Respiratory Syndrome (PRRS) infection on these two traits. In fact, the results show that growth of the more efficient pigs was less affected by PRRS infection than that of the inefficient line. These findings provide commercial farmers with additional incentives to invest in feed-efficient pigs.


Costs Of Bedding, Trailer Washout, And Transport Losses In Market Weight Pigs, Rebecca K. Kephart, Anna K. Johnson, Kenneth J. Stalder, Ted W. Huiatt, Avi Sapkota, John James Mcglone Jan 2014

Costs Of Bedding, Trailer Washout, And Transport Losses In Market Weight Pigs, Rebecca K. Kephart, Anna K. Johnson, Kenneth J. Stalder, Ted W. Huiatt, Avi Sapkota, John James Mcglone

Animal Industry Report

Trailers used to transport market weight pigs in the U.S. are passively ventilated meaning airflow is dependent upon vehicle movement, thermal buoyancy, and wind speed. Research detailing the trailer micro-environment in the U.S. is sparse. The amount of bedding on a trailer and the number of loads on it are believed to influence trailer microenvironment. Using 2011 data for number of pigs transported, industry standards for density of pigs inside a trailer, and the average cost of bedding an estimated annual cost of bedding can be made. If new bedding were put on trailers after every load it ...


Analysis Of Gene Expression In A Region Associated With Host Response To Porcine Reproductive And Respiratory Syndrome Virus Challenge, Christopher J. Eisley, Eric R. Fritz-Waters, Igseo Choi, James Eugene Koltes, Nicholas Boddicker, James M. Reecy, Joan Lunney, Susan L. Carpenter, Chris K. Tuggle, Peng Liu, Jack C. M. Dekkers Jan 2014

Analysis Of Gene Expression In A Region Associated With Host Response To Porcine Reproductive And Respiratory Syndrome Virus Challenge, Christopher J. Eisley, Eric R. Fritz-Waters, Igseo Choi, James Eugene Koltes, Nicholas Boddicker, James M. Reecy, Joan Lunney, Susan L. Carpenter, Chris K. Tuggle, Peng Liu, Jack C. M. Dekkers

Animal Industry Report

Previous work identified a 1 Megabasepair region encompassing a quantitative trait locus (QTL) on Sus scrofa chromosome 4 associated with response to PRRS virus infection, in terms of weight gain and PRRS viremia. To identify candidate genes in the region responsible for these effects, we evaluated the expression of genes in the region by RNAseq using RNA isolated from whole blood taken from 8 pairs of littermates at 5 time-points following experimental infection with the PRRS virus. Each littermate pair included one individual with the favorable genotype (AB) for the SSC4 region and one with the unfavorable genotype (AA). A ...


Validation Of The Effects Of A Snp On Ssc4 Associated With Viral Load And Weight Gain In Piglets Experimentally Infected With A 2006 Prrs Virus Isolate, Andrew S. Hess, Nicholas Boddicker, Bob Rowland, Joan Lunney, Graham Plastow, Jack C. M. Dekkers Jan 2014

Validation Of The Effects Of A Snp On Ssc4 Associated With Viral Load And Weight Gain In Piglets Experimentally Infected With A 2006 Prrs Virus Isolate, Andrew S. Hess, Nicholas Boddicker, Bob Rowland, Joan Lunney, Graham Plastow, Jack C. M. Dekkers

Animal Industry Report

Host genetic differences in viral load (VL) and weight gain (WG) during challenge were assessed for five trials of ~200 commercial crossbred piglets each, all from different commercial suppliers. Piglets were experimentally infected with porcine reproductive and respiratory syndrome virus (PRRSV) isolate KS-2006-72109 in order to validate the effects of a SNP previously identified on SSC4 (WUR10000125), whereby AB individuals had increased WG and reduced VL when experimentally infected with PRRSV isolate NVSL-97-7895. VL was defined as the area under the curve of logged viremia from 0-21 dpi. WG was defined as the weight gained from 0-42 dpi. The SNP ...


The Impact Of Housing System On The Determination Of Apparent Total Tract Digestibility Of Energy And Dry Matter, John F. Patience, Stacie A. Gould, Cassie L. Holloway Jan 2014

The Impact Of Housing System On The Determination Of Apparent Total Tract Digestibility Of Energy And Dry Matter, John F. Patience, Stacie A. Gould, Cassie L. Holloway

Animal Industry Report

The performance and growth of 176 gilts in three different housing systems was observed over a 7-day trial at the Iowa State Swine Nutrition Farm. Pigs were split into one of three systems, group pens (GP) with 20 pigs in each, individual pens (IP), or metabolism crates (MC). Pigs started with an initial weight of 48.5 kg, ± 0.31, and were fed and watered ad libitum. Pigs in the GP systems had less apparent total tract digestibility (ATTD) than those in IP, which also had less ATTD than those in MC. This indicates that digestibility trials held in MC ...


Application Of Genomic Information To Longitudinal Traits, Anna Wolc, Jesus Arango, Petek Settar, Janet E. Fulton, Neil P. O'Sullivan, Rudolf Preisinger, Rohan L. Fernando, Dorian J. Garrick, Jack C. M. Dekkers Jan 2014

Application Of Genomic Information To Longitudinal Traits, Anna Wolc, Jesus Arango, Petek Settar, Janet E. Fulton, Neil P. O'Sullivan, Rudolf Preisinger, Rohan L. Fernando, Dorian J. Garrick, Jack C. M. Dekkers

Animal Industry Report

Random regression models are commonly used for analysis of longitudinal traits measured across time such as egg production in chickens and milk production in cattle. In this study, we include genomic information for evaluation of longitudinal traits using a random regression reduced animal model with a genomic relationship matrix. Substantial increases in accuracy of estimated breeding values were observed when applying the proposed method to egg production records in chickens.


Thermal And Mechanical Nociception Threshold Tests As Objective Tools To Measure Painful And Non-Painful Lameness Phases In Multiparous Sows, Caroline M. Mohling, Anna K. Johnson, Caitlyn Abell, Kenneth J. Stalder, Locke A. Karriker, Johann F. Coetzee, Suzanne T. Millman Jan 2014

Thermal And Mechanical Nociception Threshold Tests As Objective Tools To Measure Painful And Non-Painful Lameness Phases In Multiparous Sows, Caroline M. Mohling, Anna K. Johnson, Caitlyn Abell, Kenneth J. Stalder, Locke A. Karriker, Johann F. Coetzee, Suzanne T. Millman

Animal Industry Report

The objective of this study was to quantify differences in thermal and mechanical nociception thresholds when sows are in painful and non-painful lameness states. Twelve, clinically healthy, mixed-parity, crossbred sows were used for each of the nociceptive threshold tests. The sow was the experimental unit and a cross-over design with a 2 (left and right hind limb) x 3 (days: D-1, D+1 and D+6) factorial arrangement of treatments were compared. On induction day (D0), 10 mg of amphotericin B were injected in the distal interphalangeal joint space in both claws of one hind limb. All sows served as ...


Carcass Composition Of Market Weight Pigs Subjected To Heat Stress In Utero Or During Growth, Shannon M. Cruzen, Rebecca Boddicker, Kody L. Graves, Theresa P. Johnson, Emily Arkfield, Lance H. Baumgard, Jason W. Ross, Steven M. Lonergan, Tim Safranski, Matt Lucy Jan 2014

Carcass Composition Of Market Weight Pigs Subjected To Heat Stress In Utero Or During Growth, Shannon M. Cruzen, Rebecca Boddicker, Kody L. Graves, Theresa P. Johnson, Emily Arkfield, Lance H. Baumgard, Jason W. Ross, Steven M. Lonergan, Tim Safranski, Matt Lucy

Animal Industry Report

Pigs were exposed to prolonged chronic heat stress (HS) and thermoneutral (TN) conditions prenatally (during first of last half of gestation) or postnatally (7-10 wk starting at 14 wk of age). Gestational HS had minimal impact on carcass composition but may impact skeletal system structure and development. Additionally, results indicate that while similar levels of lean can be achieved in pigs subjected to chronic postnatal HS with increased time on feed, carcass fat may be decreased with HS.


Backfat Depth And Loin Eye Area Measurements Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa, P. Matthew Swantek, Wayne B. Roush, David R. Stender, John W. Mabry, Mark S. Honeyman Jan 2014

Backfat Depth And Loin Eye Area Measurements Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa, P. Matthew Swantek, Wayne B. Roush, David R. Stender, John W. Mabry, Mark S. Honeyman

Animal Industry Report

The variation in backfat of commodity pork has declined to the point some major packers are no longer measuring backfat depth. From our previous research with Berkshire pigs, a large amount of variation in backfat and loin eye area (LEA) still existed, especially between barrows and gilts. In our previous research, barrows average one inch backfat depth around 210 pounds whereas gilts did not achieve one inch until 260 pounds. This potentially may be a meat quality issue for gilts marketed less than 260 pounds.

The objective of these trials was to replicate our previous study and to determine whether ...


Effects Of Handling Intensity On Surface Temperature When Loading Market Weight Pigs, Caroline M. Mohling, Anna K. Johnson, Kenneth J. Stalder, Ted W. Huiatt, Avi Sapkota, John James Mcglone Jan 2014

Effects Of Handling Intensity On Surface Temperature When Loading Market Weight Pigs, Caroline M. Mohling, Anna K. Johnson, Kenneth J. Stalder, Ted W. Huiatt, Avi Sapkota, John James Mcglone

Animal Industry Report

The objective of this study was to determine the relationship between handling intensity and surface temperature of the market weight pig at the time of loading on commercial farms. One hundred and fifty-five loads of market weight pigs were used. Handling intensity (HI) score ranged from 1 to 5 where 1 was very good handling and 5 was very poor handling. Researchers took pig movement, use of handling tools, and vocalizations, slips and falls, and stress signs into consideration when scoring. All data is presented descriptively. A total of 77.4 % scored ≤ 3 for HI, indicating a positive animal-human interaction ...


Midwest Dairy School Focuses On Generational Transfer, Jennifer A. Bentley, Larry F. Tranel, Kristen Schulte, Kelvin L. Leibold Jan 2014

Midwest Dairy School Focuses On Generational Transfer, Jennifer A. Bentley, Larry F. Tranel, Kristen Schulte, Kelvin L. Leibold

Animal Industry Report

The Midwest Dairy School 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, Northeast Iowa Community College, and Northeast Iowa Dairy Foundation, this program has continued to provide valuable information.


Grass-Finishing High Value Beef: A Pilot Project In Northern United States, Pete Lammers, Suzanne T. Millman, Reneé Dewell, Dallas L. Maxwell, Mark S. Honeyman Jan 2014

Grass-Finishing High Value Beef: A Pilot Project In Northern United States, Pete Lammers, Suzanne T. Millman, Reneé Dewell, Dallas L. Maxwell, Mark S. Honeyman

Animal Industry Report

This project examined the feasibility of producing USDA Choice beef—without grain-based finishing—through genetic selection and pasture management. Purebred Angus heifers with high-marbling potential and small/medium frame size were born spring 2011. Heifers were allotted to either pasture (grass-finishing) or feedlot (grain-fed) treatments based on liveweight and intramuscular fat content. When reaching market weight (±1,000 lb) heifers were harvested and carcass data was collected. Feedlot cattle were marketed on August 27, 2012. The grass-finished cattle were marketed on November 1, 2012. Starting and end weights were similar for both treatments but feedlot cattle reached market weight 50 ...


Effects Of Internal Parasite Infection At Feedlot Arrival On Performance And Carcass Characteristics In Beef Steers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson Jan 2014

Effects Of Internal Parasite Infection At Feedlot Arrival On Performance And Carcass Characteristics In Beef Steers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson

Animal Industry Report

The performance and carcass characteristics of 43 beef steers were evaluated relative to internal parasite burden at feedlot arrival. Despite being effectively dewormed at feedlot entry, cattle with more significant worm burdens on arrival had lesser body weights throughout the feeding period and tended to have more days on feed. Even with a tendency for more days on feed, more heavily infected cattle also tended to have lesser marbling scores, dressing percentages, KPH, and back fat. However, there were no differences in ADG throughout the finishing period, REA, yield grade, or HCW relative to initial worm burden. These data indicate ...


Effect Of Dietary Changes On Manure Nutrient Content And Value, P. Matthew Swantek, David R. Stender, Thomas G. Miller, Mark Storlie Jan 2014

Effect Of Dietary Changes On Manure Nutrient Content And Value, P. Matthew Swantek, David R. Stender, Thomas G. Miller, Mark Storlie

Animal Industry Report

The design of the model is to evaluate a more comprehensive valuation swine feeding programs other than cost per ton of feed or cost per pound of gain. Ingredient supplies and value may be part of the a production system, but if that system depends upon more than pounds of pork out the door, and utilizes manure as a fertilizer input for crop production, then how the pigs are fed has consequences other than feed cost per pig or gain.

The model may be used to help identify the role of swine diet formulations in the determination of manure nutrient ...


Independent Study 490a: Positive Reinforcement Training Piglets To Stand In A Container And Follow A Human, Adrianne R. Kaiser, Anna K. Johnson, Jason W. Ross, Joshua T. Selsby, Kenneth J. Stalder Jan 2014

Independent Study 490a: Positive Reinforcement Training Piglets To Stand In A Container And Follow A Human, Adrianne R. Kaiser, Anna K. Johnson, Jason W. Ross, Joshua T. Selsby, Kenneth J. Stalder

Animal Industry Report

The Department of Animal Science within the biomedical research area is using the pig as a model for Duchenne and Becker muscular dystrophy. Duchenne muscular dystrophy is the leading, fatal, X-linked disease, affecting 1:3,500 male births worldwide. Two tests require the pigs afflicted with Duchenne and Becker muscular dystrophy is to stand still and walk in a controlled manner. To accomplish this pigs need to undergo Positive Reinforcement Training (PRT). Therefore, the objectives of this study was to use PRT on young pigs to 1) get them to recogonize PRT during lactation 2) have them stand still one ...


Update From The Animal Science Undergraduate Teaching Section, Jodi A. Sterle Jan 2014

Update From The Animal Science Undergraduate Teaching Section, Jodi A. Sterle

Animal Industry Report

Undergraduate student enrollment in the Animal Science department continues to increase. A total of 1,051 undergraduate students set another new record this fall. Placement numbers also remain high, with over 97% of graduates either entering graduate or professional school or gaining employment within six months of graduation


Sensory Characteristics Of Loins From Pigs Divergently Selected For Residual Feed Intake And Fed Diets Differing In Energy, Emily K. Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, Christine A. Fedler, Kenneth J. Prusa, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan Jan 2014

Sensory Characteristics Of Loins From Pigs Divergently Selected For Residual Feed Intake And Fed Diets Differing In Energy, Emily K. Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, Christine A. Fedler, Kenneth J. Prusa, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan

Animal Industry Report

The goal of this experiment was to determine the impact of high and low energy diets on sensory traits of pigs divergently selected for residual feed intake (RFI). Diet had little effect on sensory quality of loins. Line did have an impact on sensory rated juiciness of loins. Loins from animals of the LRFI line had greater juiciness than those of the HRFI line. This difference is most likely not numerically large enough to be detected by the untrained consumer.


Impact Of Mitochondrially Targeted Novel Antioxidant On Pig Feed Efficiency, Mathew R. O'Neil, George A. Kraus, Nicholas K. Gabler, Steven M. Lonergan, Donald C. Beitz Jan 2014

Impact Of Mitochondrially Targeted Novel Antioxidant On Pig Feed Efficiency, Mathew R. O'Neil, George A. Kraus, Nicholas K. Gabler, Steven M. Lonergan, Donald C. Beitz

Animal Industry Report

Thirty crossbred barrows were used to evaluate the effects of conventional and mitochondrially targeted antioxidants on body weight, average daily gain, feed efficiency, and lean tissue accretion. The study did not yield statistically significant results for any variable measured. However, for each variable measured, the ranking of responses for treatments matched what was predicted by the hypothesis. Our results suggest that use of mitochondrially targeted antioxidants show promise in improving feed efficiency


Genetic Analysis Of Reproductive Traits And Antibody Response In Prrs Infected Sows, Nick V. L. Serão, Oswald Matika, Steve Bishop, Bob Kemp, John Harding, Graham Plastow, Jack C. M. Dekkers Jan 2014

Genetic Analysis Of Reproductive Traits And Antibody Response In Prrs Infected Sows, Nick V. L. Serão, Oswald Matika, Steve Bishop, Bob Kemp, John Harding, Graham Plastow, Jack C. M. Dekkers

Animal Industry Report

The genetic components of reproductive performance and antibody response of 641 commercial sows were assessed in a commercial herd that faced a PRRS outbreak. Antibody response after the PRRS outbreak was highly heritable and had high genetic correlations with reproductive traits. Many genomic regions were associated with antibody response in this study. These results indicate that there is a significant genomic component associated with PRRS antibody response and its high genetic correlations with reproductive traits during PRRS suggest that this trait could be used as an indicator trait to reduce the impact of PRRS on reproductive performance.


Embedded Micro-Computer Base Force Plate As An Objective Tool To Measure Hoof Lameness Phases In Multiparous Sows, Caroline M. Mohling, Anna K. Johnson, Kenneth J. Stalder, Caitlyn Abell, Locke A. Karriker, Johann F. Coetzee, Suzanne T. Millman Jan 2014

Embedded Micro-Computer Base Force Plate As An Objective Tool To Measure Hoof Lameness Phases In Multiparous Sows, Caroline M. Mohling, Anna K. Johnson, Kenneth J. Stalder, Caitlyn Abell, Locke A. Karriker, Johann F. Coetzee, Suzanne T. Millman

Animal Industry Report

The objective of this study was to compare differences in weight placed on each hoof from sows in differing lameness phases. Twelve, clinically healthy, mixed-parity, crossbred sows (228.89±19.17 kg) were used. The sow was the experimental unit and a cross-over design with a 2 (hind left and hind right hoof) x 3 (days: D-1, D+1 and D+6) factorial arrangement of treatments were compared. On induction day, 10 mg of amphotericin B were injected in the distal interphalangeal joint space in both claws of one hind hoof. All sows served as their own control and treatment ...


Diets Differing In Energy And Fiber Content Affected Adipose Tissue Quality Of Carcasses From Pigs Divergently Selected For Residual Feed Intake, Emily Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan Jan 2014

Diets Differing In Energy And Fiber Content Affected Adipose Tissue Quality Of Carcasses From Pigs Divergently Selected For Residual Feed Intake, Emily Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan

Animal Industry Report

The goal of this experiment was to determine the impact of high and low energy diets on adipose tissue quality of animals selected for divergent residual feed intake (RFI). Pigs of a low RFI (efficient) line and high RFI (less efficient) line were placed on either a high energy, low fiber (HELF) diet or a low energy, high fiber (LEHF) diet. Line had no impact on adipose tissue color or iodine value. Regardless of line, feeding a diet low in energy resulted in adipose tissue with a darker colored and increased iodine value, when compared to adipose tissue from animals ...


Growth Rate And Feed Intake Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa, P. Matthew Swantek, Wayne B. Roush, David R. Stender, John W. Mabry, Mark S. Honeyman Jan 2014

Growth Rate And Feed Intake Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa, P. Matthew Swantek, Wayne B. Roush, David R. Stender, John W. Mabry, Mark S. Honeyman

Animal Industry Report

Berkshire pigs make up the majority of the niche market pig population, and although niche pork production has increased across Iowa and the United States and demand continues for high quality pork there remains a lack of production standards for niche pork producers to benchmark their performance against. The Berkshire pigs in our previous studies grew faster and were more efficient in feed conversion than expected. Therefore the objective of this study was to replicate our earlier work, and add to the database of niche pork production.

For this group of Berkshire pigs, growth rate was better than earlier research ...


Identifying Dietary Fiber Components That Best Predict The Digestible And Metabolizable Energy Content In Nine Corn Co-Products Fed To Growing Pigs, Nestor A. Gutierrez, Nick V. L. Serão, Brian J. Kerr, Ruurd T. Zijlstra, John F. Patience Jan 2014

Identifying Dietary Fiber Components That Best Predict The Digestible And Metabolizable Energy Content In Nine Corn Co-Products Fed To Growing Pigs, Nestor A. Gutierrez, Nick V. L. Serão, Brian J. Kerr, Ruurd T. Zijlstra, John F. Patience

Animal Industry Report

An experiment was conducted to determine the best dietary fiber (DF) assay to estimate the effect of DF concentration on energy digestibility, and to predict the digestible (DE) and metabolizable (ME) energy of 9 corn co-products: conventional corn bran, corn bran with solubles, corn distillers dried grains with solubles (DDGS) conventionally produced, reduced oil DDGS, uncooked DDGS, high protein distillers dried grains, dehulled degermed corn, corn germ meal, and corn gluten meal. The apparent total tract digestibility (ATTD) of gross energy (GE), and the DE and ME of the 9 feed ingredients were determined in 20 growing pigs (BW = 25 ...


Divergent Selection For Residual Feed Intake Impacts Carcass Composition Of Pigs On High Or Low Energy Diets, Emily Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan Jan 2014

Divergent Selection For Residual Feed Intake Impacts Carcass Composition Of Pigs On High Or Low Energy Diets, Emily Arkfield, Emily Hamman, Jordy E. Berger, Roger Johnson, Jennifer Young, John F. Patience, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan, Elisabeth J. Huff-Lonergan

Animal Industry Report

Animals divergently selected for low and high residual feed intake (RFI) were fed either a high energy, low fiber (HELF) or low energy, high fiber (LEHF) diet. Regardless of line, pigs fed the LEHF diet had carcasses with reduced fat depth, loin depth, and greater percent lean. Line had no significant effect on carcass composition traits possibly due to line by sex interactions. Within the low RFI line, barrows had heavier carcasses with greater fat depth, while gilts had carcasses with a greater percent lean. Diet was the largest factor in final carcass composition of pigs in this study.