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Full-Text Articles in Life Sciences

Combining Pediocin (Alta™ 2341) With Irradiation For Control Of Listeria Monocytogenes, C. H. Chen, Joseph G. Sebranek, James S. Dickson, Aubrey F. Mendonca Nov 2014

Combining Pediocin (Alta™ 2341) With Irradiation For Control Of Listeria Monocytogenes, C. H. Chen, Joseph G. Sebranek, James S. Dickson, Aubrey F. Mendonca

James S. Dickson

Pediocin (ALTA™ 2341) was studied in combination with irradiation treatments for control of Listeria monocytogenes on ready-to-eat (RTE) meat products. Both pediocin and irradiation were effective but the combination was highly effective and synergistic. Therefore, the use of pediocin for RTE meats that are irradiated should permit use of lower irradiation doses and improved product quality because of less irradiation-induced off-odors


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 Nov 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

Steven M. Lonergan

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 ...


The Impact Of Divergent Selection For Residual Feed Intake On Meat Quality Traits Of Loins From Pigs On High Or Low Energy Diets, Emily 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 Nov 2014

The Impact Of Divergent Selection For Residual Feed Intake On Meat Quality Traits Of Loins From Pigs On High Or Low Energy Diets, Emily 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

Steven M. Lonergan

The goal of this experiment was to determine the impact of low and high energy diets on the meat quality of animals selected for divergent residual feed intake (RFI). Low RFI (efficient) and high RFI (less efficient) pigs were fed either a high energy, low fiber (HELF) or low energy, high fiber (LEHF) diet. Diet had little impact on meat quality. Selection for low RFI animals resulted in loins with greater water holding capacity and sensory juiciness. High RFI animals have loins with greater percent lipid, color and marbling scores, and a* values (are more red in color). It is ...


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 Nov 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

Steven M. Lonergan

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


Mortality Rate Of Weaned And Feeder Pigs As Affected By Ground Transportation Conditions, Yang Zhao, Hongwei Xin, Jay D. Harmon, Steven J. Hoff, Thomas J. Baas Jul 2014

Mortality Rate Of Weaned And Feeder Pigs As Affected By Ground Transportation Conditions, Yang Zhao, Hongwei Xin, Jay D. Harmon, Steven J. Hoff, Thomas J. Baas

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Ground transportation of pigs at early ages is typical in modern swine production because the young animals are often produced in one part of the country and finished in another. One challenge associated with this practice is the profit-stripping incidence of mortality and compromised animal welfare due to stress stemming from unfavorable transporting conditions. The objective of this study was to examine possible causative relationships of mortality rate of weaned and feeder pigs to ground transportation conditions. Records of weaned and feeder pig transportation for the period of April 2012 – January 2014 were provided by a U.S. swine ...


Selection For Residual Feed Intake Alters The Protein Profile Of The Mitochondria In Pigs, Kyle Grubbs, Nicholas K. Gabler, Jack C. M. Dekkers, Elisabeth J. Huff-Lonergan, Steven M. Lonergan Apr 2014

Selection For Residual Feed Intake Alters The Protein Profile Of The Mitochondria In Pigs, Kyle Grubbs, Nicholas K. Gabler, Jack C. M. Dekkers, Elisabeth J. Huff-Lonergan, Steven M. Lonergan

Elisabeth J. Huff-Lonergan

Understanding the biological mechanisms underlying feed efficiency is paramount to creating a more efficient pork production system. Selection for residual feed intake (RFI) is a measure of feed efficiency and can be used as a model to determine these biological mechanisms. The mitochondria are responsible for the conversion of dietary energy to cellular energy in the form of ATP. ATP is used by many biological pathways for both growth and maintenance. These data show the mitochondria protein profile is altered with genetic selection for RFI. This alteration in protein profile indicates mitochondria from more efficient low RFI pigs may be ...


Analytical Methods For Chemical And Sensory Characterization Of Scent-Markings In Large Wild Mammals: A Review, Simone B. Soso, Jacek A. Koziel, Anna K. Johnson, Young Jin Lee, W. Sue Fairbanks Mar 2014

Analytical Methods For Chemical And Sensory Characterization Of Scent-Markings In Large Wild Mammals: A Review, Simone B. Soso, Jacek A. Koziel, Anna K. Johnson, Young Jin Lee, W. Sue Fairbanks

Agricultural and Biosystems Engineering Publications

In conjoining the disciplines of “ethology” and “chemistry” the field of “Ethochemistry” has been instituted. Ethochemistry is an effective tool in conservation efforts of endangered species and the understanding of behavioral patterns across all species. Chemical constituents of scent-markings have an important, yet poorly understood function in territoriality, reproduction, dominance, and impact on evolutionary biology, especially in large mammals. Particular attention has recently been focused on scent-marking analysis of great cats (Kalahari leopards (Panthera pardus), puma (Puma concolor) snow leopard (Panthera uncia), African lions (Panthera leo), cheetahs (Acinonyx jubatus), and tigers (Panthera tigris)) for the purpose of conservation. Sensory analyses ...


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 ...


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 ...


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 ...