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Short-Term Exposure To Heat Stress Attenuates Appetite And Intestinal Integrity In Growing Pigs 1, S. C. Pearce, M. V. Sanz-Fernandez, James Hollis, Lance H. Baumgard, Nicholas K. Gabler Dec 2014

Short-Term Exposure To Heat Stress Attenuates Appetite And Intestinal Integrity In Growing Pigs 1, S. C. Pearce, M. V. Sanz-Fernandez, James Hollis, Lance H. Baumgard, Nicholas K. Gabler

Food Science and Human Nutrition Publications

Acute heat stress (HS) and heat stroke can be detrimental to the health, well-being, and performance of mammals such as swine. Therefore, our objective was to chronologically characterize how a growing pig perceives and initially copes with a severe heat load. Crossbred gilts (n=32; 63.8±2.9 kg) were subjected to HS conditions (37°C and 40% humidity) with ad libitum intake for 0, 2, 4, or 6 h (n=8/time point). Rectal temperature (Tr), respiration rates (RR), and feed intake were determined every 2 h. Pigs were euthanized at each time point and fresh ileum and ...


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 ...


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 ...


Effects Of Two Feed Additives On Performance, Energy Digestibility, And Body Composition Of First-Cycle Laying Hens Fed Two Concentrations Of Dietary Energy, Alysha Gareis Jan 2014

Effects Of Two Feed Additives On Performance, Energy Digestibility, And Body Composition Of First-Cycle Laying Hens Fed Two Concentrations Of Dietary Energy, Alysha Gareis

Graduate Theses and Dissertations

Three experiments were conducted to determine the effects of feed additives on the performance, energy digestibility, and body composition of first-cycle laying hens fed two concentrations of dietary energy. The first and second experiments were 8 wk in duration. The first experiment contained two dietary energy levels (2,750 and 2,850 kcal/kg) with or without the addition of a mannose rich fraction (MRF) from a specific strain of yeast. As expected, no differences in performance parameters including egg production, egg weight, and egg mass were detected, although increased dietary energy, but not MRF resulted in increased total and ...


Nutrient Utilization, Pork Quality, And Lysine Requirement Of Immunological Castrates, Amanda Jo Elsbernd Jan 2014

Nutrient Utilization, Pork Quality, And Lysine Requirement Of Immunological Castrates, Amanda Jo Elsbernd

Graduate Theses and Dissertations

Investigational research is required to support the development of a new technology called immunological castration, which addresses the issue of boar taint in male pigs and allows for increasing growth efficiency. There is a knowledge gap in the understanding of the nutritional requirements for immunological castrates (IC). Therefore, the objective of this thesis was to extend the current knowledge of immunological castration in the pig as it relates to growth performance, nitrogen and phosphorus retention, and pork quality. Forty six pigs were used in the first experiment, 11 each of IC and physical castrates (PC) and 12 each of gilts ...


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 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 ...


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.


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 ...


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 ...


An On-Farm Demonstration Of Calcium Hydroxide Treatment Of Corn Silage With Subsequent Observations In The Cooperating Dairy Herd, Garland R. Dahlke Jan 2014

An On-Farm Demonstration Of Calcium Hydroxide Treatment Of Corn Silage With Subsequent Observations In The Cooperating Dairy Herd, Garland R. Dahlke

Animal Industry Report

Calcium hydroxide is best used when treating over mature fibrous forage to improve dry matter digestibility and energy availability to the recipient animal. There does not seem to be a strong impact on treating high quality feeds such as good quality corn silage. The treated feed tends to ferment slower, but cattle accept it well and production does not seem to be adversely affected and may, in fact tend to reduce some day to day production variation.


Effect Of Sampling Time On Feed Intake Data And Residual Feed Intake When Compared To Extended Sample Times, Garland R. Dahlke Jan 2014

Effect Of Sampling Time On Feed Intake Data And Residual Feed Intake When Compared To Extended Sample Times, Garland R. Dahlke

Animal Industry Report

A shorter term of feed intake monitoring, whether it is from a consecutive number of days or from a periodic sampling, correlates fairly well with a full duration accumulation of feed intake data in a normal bull performance test for the weaning contemporary group.


Nitrogen Retention And Nutrient Digestibility In Diets Formulated Using The Net Energy System, Jesus A. Acosta Camargo, Dean Boyd, John F. Patience Jan 2014

Nitrogen Retention And Nutrient Digestibility In Diets Formulated Using The Net Energy System, Jesus A. Acosta Camargo, Dean Boyd, John F. Patience

Animal Industry Report

Diets with an increasing amount of co-products and formulated with a constant or declining net energy (NE) content were compared for ATTD of gross energy and for nitrogen retention. Forty gilts 38.5±1.2 kg BW were individually allocated and fed ad libitum with the experimental diets for a 69d period. Fecal and urine samples were collected two times for growing and for finishing periods. ATTD decreased when co-products were added, even when NE content held constant. Nitrogen retention was lower when co-products were added to the diet. In conclusion diets containing up to 36% co-products and formulated using ...


Calcium Oxide And Calcium Hydroxide Treatment At Various Moisture Levels Of Cornstalks And Fescue Hay, Russell M. Euken, Garland R. Dahlke Jan 2014

Calcium Oxide And Calcium Hydroxide Treatment At Various Moisture Levels Of Cornstalks And Fescue Hay, Russell M. Euken, Garland R. Dahlke

Animal Industry Report

Calcium Oxide (CaO) and Calcium Hydroxide (Ca(OH)2) treatment of forage when a fresh alkali product is used can improve the digestibility of some forage, but not all forages stand to benefit. In these trials the treatments at lower moisture did not combust and there was evidence that the treatment was effective in increasing digestibility at moistures less than 50%. Less water or possible no water addition might allow for easier treatment of forages. Larger scale treatments should be evaluated. It would be interesting to see if the alkali treatment has different effect on different particle sizes of forage.


Effects Of Calf Birth Weight, Sex, And Number Of Calvings On Assigned Maternal Disposition Scores, Anna K. Johnson, Emma C. Farruggio, Samantha J. Hamlin, Theresa P. Johnson, Marshall V. Ruble Jan 2014

Effects Of Calf Birth Weight, Sex, And Number Of Calvings On Assigned Maternal Disposition Scores, Anna K. Johnson, Emma C. Farruggio, Samantha J. Hamlin, Theresa P. Johnson, Marshall V. Ruble

Animal Industry Report

Little work has been conducted to compare maternal disposition scores assigned to a heifer/cow after calving, and if these scores remain stable over consecutive calvings. The objective of this trial was to determine if calf birth weight, sex, and the number of calvings affects the cows maternal disposition scores. The fall data set included observations from 406 calvings, which were pure Angus (n = 316), pure Simmental (n = 75), or crosses of the two breeds (n = 43). The spring data set included observations from 550 calvings, which were Angus (n = 253) or Simmental (n = 338). All calvings occurred on pasture ...


Identification Of Genomic Regions Associated With Lactation Performance In Yorkshire Sows, Dinesh M. Thekkoot, Bob Kemp, Max F. Rothschild, Graham Plastow, Jack C. M. Dekkers Jan 2014

Identification Of Genomic Regions Associated With Lactation Performance In Yorkshire Sows, Dinesh M. Thekkoot, Bob Kemp, Max F. Rothschild, Graham Plastow, Jack C. M. Dekkers

Animal Industry Report

Lactation is an economically important phase in the lifecycle of sows, and events that happen during that period have a big impact on longevity of the sow and therefore profitability of the operation. The difficulty in collecting accurate phenotypes that are required to assess lactation performance, and the inability to evaluate longevity of sows in nucleus herds, highlight the importance of using genomic tools to examine the underlying genetics of these traits. The goal of this project was to conduct genome wide association studies (GWAS) of traits related to lactation in Yorkshire sows using 60k SNP marker information. A 1 ...


Excess Rumen Undegradable Protein Alters Parameters Of Reproductive Function In Beef Cows, Patrick J. Gunn, Ron Lemenager, Allen Bridges Jan 2014

Excess Rumen Undegradable Protein Alters Parameters Of Reproductive Function In Beef Cows, Patrick J. Gunn, Ron Lemenager, Allen Bridges

Animal Industry Report

Evolution of the ethanol industry will likely result in future distiller’s grains feedstuffs that are more concentrated in crude protein (CP) and less concentrated in fat. However, the direct effects of excess dietary CP on reproductive function in beef cows have not been adequately addressed. In the present study, we observed that excess dietary CP derived from a rumen undegradable protein (RUP) abundant feedstuff impacted ovarian follicular growth patterns and affected follicular estradiol production and circulating concentrations of progesterone in the subsequent estrous cycle. The mechanisms by which these physiological and endocrine changes occur as a result of excessive ...


Evaluation Of Teat Coverage Persistency And Teat Health For 2 New Prototype & 1 Commercial Dry Period Persistent Barrier Teat Dips, Melanie M. Matti, Leo L. Timms Jan 2014

Evaluation Of Teat Coverage Persistency And Teat Health For 2 New Prototype & 1 Commercial Dry Period Persistent Barrier Teat Dips, Melanie M. Matti, Leo L. Timms

Animal Industry Report

Mastitis research has shown that 40-50% of intramammary infections (IMI) are contracted during the dry or non-lactating period with the greatest percentages of these occurring during the first and last two weeks of the dry period. The ability to develop and apply external persistent barrier teat dip products (like a liquid bandage) that can persist for these 1 week periods could decrease IMI, thus improving animal health and performance, and product quality and safety. The objective of this study was to evaluate 2 new prototype persistent barrier dry cow teat dips compared to a commercially available dry cow barrier teat ...


Inclusion Of Fresh Pork Pancreas In Raw Pork Meat-Based Diets For African Wildcats (Felis Silvestris Tristrami) Does Not Impact Macronutrient Digestibility, Cheryl L. Morris, Kelly Kappen Jan 2014

Inclusion Of Fresh Pork Pancreas In Raw Pork Meat-Based Diets For African Wildcats (Felis Silvestris Tristrami) Does Not Impact Macronutrient Digestibility, Cheryl L. Morris, Kelly Kappen

Animal Industry Report

Apparent total tract macronutrient digestibility was evaluated in 4 African wildcats (Felis silvestris tristrami) fed beef or pork-based raw meat diets. Diets were formulated to meet nutrient requirements of cats (NRC, 2006). Cats were fed isocaloric amounts of either control (standard beef raw diet) or pork-based raw diets containing 0, 3, or 5% added raw pancreas, in four 14-day periods. Protein digestibility was higher for pork diets compared with beef and inclusion up to 5% fresh pancreas did not increase macronutrient digestibility in healthy animals. Raw pork can be fed to exotic felids as a viable alternative to standard beef-based ...


June Dairy Month Open Houses: Learning Events To Improve Consumer Understanding Of Modern Animal Agriculture, Leo L. Timms, Kevin Lager, Jennifer A. Bentley, Megan Kregel Jan 2014

June Dairy Month Open Houses: Learning Events To Improve Consumer Understanding Of Modern Animal Agriculture, Leo L. Timms, Kevin Lager, Jennifer A. Bentley, Megan Kregel

Animal Industry Report

Three dairy open houses as part of June Dairy Month events were conducted to provide the public the opportunity to experience and learn first-hand about the efforts made daily on modern dairies to achieve cow care, cow comfort and health, hygienic milking procedures, local cropping systems that provide quality feed for the dairy herd, manure management and land stewardship, respect for family and non-family workers, and overall quality and safety of milk and dairy products. These events were a product of industry partnerships. The three events reached 3600+ participants. Surveys performed at two events showed many participants had trust in ...


Effects Of D-Α-Tocopherol And Dietary Energy On Growth And Health Of Pre-Ruminant Dairy Calves, Lucas A. Krueger, Donald C. Beitz, Ken Onda, Mohammed Osman, Mathew R. O'Neil, Samantha Lei, Robert Stuart, Howard D. Tyler, Brian J. Nonnecke Jan 2014

Effects Of D-Α-Tocopherol And Dietary Energy On Growth And Health Of Pre-Ruminant Dairy Calves, Lucas A. Krueger, Donald C. Beitz, Ken Onda, Mohammed Osman, Mathew R. O'Neil, Samantha Lei, Robert Stuart, Howard D. Tyler, Brian J. Nonnecke

Animal Industry Report

Newborn Holstein bull calves were fed milk to support low or moderate growth and were supplemented with a complement of vitamins A, D, and E. The objective of the study was to determine the effects of dietary energy and vitamin supplementation on inflammation at the whole-body level. Calves were assigned randomly to one of four treatment groups (low growth, not vitamin supplemented; low growth, vitamin supplemented; moderate growth, not vitamin supplemented; moderate growth, vitamin supplemented) for five weeks. Vitamin supplementation tended to improve average daily gain in moderate-growth calves and significantly increased concentrations of retinol, 25-(OH)-vitamin D, and ...


Developing A Reduced Snp Panel For Low-Cost Genotyping In Beef Cattle, Mahdi Saatchi, Dorian J. Garrick Jan 2014

Developing A Reduced Snp Panel For Low-Cost Genotyping In Beef Cattle, Mahdi Saatchi, Dorian J. Garrick

Animal Industry Report

The objective of this study was to develop a low-density reduced SNP panel (RP) that could capture most of the predictive ability of a 50K panel for six important traits (birth, weaning and yearling weights; calving ease direct; marbling; and rib eye area) in beef cattle. More than 15,000 animals from six cattle breeds genotyped with 50K were used to select markers highly associated with target traits. Accuracies of direct genomic breeding values (DGV) were calculated for 3 independent validation populations using either 50K or RP. Accuracies of DGV obtained from RP were comparable with those obtained from 50K ...


Growth Performance And Ultrasonic Scan Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa (Trials 3 And 4), P. Matthew Swantek, David R. Stender, John W. Mabry, Mark S. Honeyman, Wayne B. Roush Jan 2014

Growth Performance And Ultrasonic Scan Of Purebred Berkshire Pigs Housed In Hoop Buildings In Iowa (Trials 3 And 4), P. Matthew Swantek, David R. Stender, John W. Mabry, Mark S. Honeyman, Wayne B. Roush

Iowa State Research Farm Progress Reports

A certified Berkshire program continues to lead niche pork production markets based on its meat quality advantage over commodity-based pork. This economic advantage is especially valuable for smaller, more traditional pork producers. The disadvantages of Berkshire pigs are fatter carcasses, slower gains, and less efficient feed conversion compared with commodity pork production. Consequently, these pigs are often a better fit for less intensive or lower production systems.


Impact Of Lameness On Production And Intake In Holstein Cows, Brittany N. Shonka, Diane M. Spurlock Jan 2014

Impact Of Lameness On Production And Intake In Holstein Cows, Brittany N. Shonka, Diane M. Spurlock

Animal Industry Report

Lameness is a critical issue to the dairy industry due to animal welfare and economic concerns. Daily milk production and dry matter intake (DMI) were monitored in 400 Holstein cows, including 51 that experienced at least one occurrence of lameness. Milk production and DMI decreased by approximately 10.3% and 13.2%, respectively, at the time of treatment for lameness, relative to production and intake levels two weeks prior to treatment. However, both production and DMI returned to pre-treatment levels two weeks after treatment. These results demonstrate that lameness can have a significant impact on milk production, and therefore economic ...


Comparison Of Ivermectin And Extended-Release Eprinomectin Deworming Treatment On Stocker And Subsequent Feedlot Performance And Carcass Characteristics Of Fall-Born Angus Heifers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson Jan 2014

Comparison Of Ivermectin And Extended-Release Eprinomectin Deworming Treatment On Stocker And Subsequent Feedlot Performance And Carcass Characteristics Of Fall-Born Angus Heifers, Christopher A. Clark, Patrick J. Gunn, Joe Dedrickson, Jerry Sorenson

Iowa State Research Farm Progress Reports

Severe parasite infections in beef cattle are sometimes associated with decreased growth and performance and clinical disease. Stocker cattle are exposed to many parasites and appropriate deworming strategies can help to minimize parasite burdens when cattle are on grass. Feedlot cattle are often dewormed at arrival and have minimal exposure to additional parasites once placed in the feedlot. The purpose of this study was to evaluate stocker and feedlot performance and carcass characteristics relative to treatment with deworming agents of varying durations of activity.


Effect Of Cooking On Radiation-Induced Chemical Markers In Beef And Pork During Storage, Joong Ho Kwon, Eun Joo Lee, Dong U. Ahn Jan 2014

Effect Of Cooking On Radiation-Induced Chemical Markers In Beef And Pork During Storage, Joong Ho Kwon, Eun Joo Lee, Dong U. Ahn

Animal Industry Report

Raw and cooked beef and pork loins were irradiated at 0 or 5 25 kGy. The radiation induced marker compounds, such as hydrocarbons, 2-alkylcyclobutanones and sulfur volatiles, were determined after 0 and 6 months of frozen storage. Two hydrocarbons [8-heptadecene (C17:1), 6,9- heptadecadiene (C17:2)] and two 2-alkylcyclobutanones [2- dodecylcyclobutanone (DCB), 2-tetradecylcyclobutanone (TCB)] were detected only in irradiated raw and cooked meats. Although pre-cooked irradiated meats produced more hydrocarbons and 2-alkylcyclobutanones than the irradiated cooked ones, the amounts of individual hydrocarbons and 2- alkylcyclobutanones, such as 8-heptadecene, 6,9- heptadecadiene, DCB, and TCB, were sufficient enough to detect ...


Genetics Of Feed Efficiency In Laying Hens, 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

Genetics Of Feed Efficiency In Laying Hens, 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

Feed efficiency data from multiple generations of a brown egg layer line were analyzed with pedigree- and marker-based methods. Marker information improved accuracy of estimated breeding values (EBV), especially for long-term prediction. Several regions in the genome were found to be associated with feed consumption and efficiency.


The Effect Of Ph And Nitrite Concentration From Celery Juice Concentrate In Ham Slices On The Antimicrobial Impact And Ham Quality Effects Of Celery Juice Concentrate Compared With Conventional Sodium Nitrite, Ashley Horsch, Joseph G. Sebranek, James S. Dickson, Steven E. Niebuhr, Benjamin L. Ruther Jan 2014

The Effect Of Ph And Nitrite Concentration From Celery Juice Concentrate In Ham Slices On The Antimicrobial Impact And Ham Quality Effects Of Celery Juice Concentrate Compared With Conventional Sodium Nitrite, Ashley Horsch, Joseph G. Sebranek, James S. Dickson, Steven E. Niebuhr, Benjamin L. Ruther

Animal Industry Report

The impact of pH and nitrite from celery juice concentrate (CJ) on the growth of L. monocytogenes on ham slices, and quality attributes of the ham were evaluated. The pH of the ham was increased by addition of CJ. The CJ treatments at both 100 and 200 mg/kg of nitrite resulted in growth of L. monocytogenes (p>0.05) similar to that of conventional nitrite at the same concentrations. Reducing the pH of CJ before addition to the ham had greater impact on L. monocytogenes growth at 200 mg/kg nitrite than at 100 mg/kg. Consequently, celery juice ...


Factors Associated With N-Specific Igg Response In Piglets Experimentally Infected With Porcine Reproductive And Respiratory Syndrome Virus, Andrew S. Hess, Benjamin Trible, Yu Wang, Bob Rowland, Joan Lunney, Jack C. M. Dekkers Jan 2014

Factors Associated With N-Specific Igg Response In Piglets Experimentally Infected With Porcine Reproductive And Respiratory Syndrome Virus, Andrew S. Hess, Benjamin Trible, Yu Wang, Bob Rowland, Joan Lunney, Jack C. M. Dekkers

Animal Industry Report

This study examined serum porcine reproductive and respiratory syndrome virus (PRRSV) N protein-specific IgG levels from sera collected from 464 Large White-Landrace commercial crossbred piglets from three separate experimental infection trials with PRRSV isolate NVSL-97- 7895. IgG levels at 42 days post infection (dpi) were measured by fluorescent microsphere immunoassay, herein referred to as total antibody (tAb) response. tAb levels were assessed for an association with different disease-related traits, the presence of a heritable genetic component, and for genomic regions associated with tAb response. tAb response was negatively associated with viral load (VL) and weight gain from 28-42 dpi (WG ...