SAES-422 Multistate Research Activity Accomplishments Report

Sections

Status: Approved

Basic Information

Participants

Duarte Diaz, University of Arizona Bob Godfrey, University of the Virgin Islands Bill Payne, University of Nevada Reno (administrator) Grazyne Tresoldi (Representing C. Tucker), University of California Davis Kifle Gebremendhin, Cornell University Dusty Yates, University of Nebraska Jessica Petersen, University of Nebraska Ty Schmidt, University of Nebraska Ignacy Misztal, University of Georgia Yuzhi Li, University of Minnesota Alexandre Scanavez (Representing Luis Mendonca and Lindsey Hulbert), Kansas State University Jay Johnson, USDA-ARS Indiana H.G. Kattesh, University of Tennessee

Wednesday August 2nd - Dinner (individually)

Thursday August 3rd -  Meeting in Hotel Conference Room – Dr. Diaz started the meeting with some general meeting information and we talked about details for the trip on Friday. Presentation by Bill Payne on administrators AFRI funding report. Dr. Payne discussed some of the ongoing administrative issues facing land grant institutions and how funding could be impacted in the upcoming years. Presentations by Bob Godfrey on evaluating the relationship between environment, body temperature and grazing behavior of hair sheep ewes in the tropics. He showed us some of the methodology utilized by his center to monitor and track behavior and grazing. The Nebraska group (Ty, Dusty and Jessica) presented on physiological, molecular, and whole-animal evaluation of the impact of stress on animal well-being and performance. Their presentation focused on refining the understanding of molecular and physiological mechanisms by which livestock respond to heat-stress and βAA supplementation, and how those responses and their interaction affect animal wellbeing and production. They presented their efforts to use video to quantify respiratory rate. Next Alexandre Scanavezon the association of vaginal temperature during the dry period and performance in the subsequent lactation of heat stressed dairy cows. Dr. Henry Kattesh on his work on the vaginal endocrine responses and bacterial interaction in beef heifers undergoing estrous synchronization. After lunch Grazyne Tresoldi presented the work from Dr. Tucker’s lab and their work on the effects of flow rate and spray timing on response to heat loan and production. Their research looked at the differences of frequency and flow rate on and showed no significant differences on laying time. Dr. Li presented her work on floor space allowance in gestating sows and behavioral issues (tail biting in growing-finishing pigs. Next Dr. Jay Johnson presented his groups work on utero heat stress on swine performance, the effects of orally administered cortisol and norepinephrine on microbial populations. Lastly, Dr. Johnson talked about the use of a conveyer belt to load weanling and nursery pigs into trailers.  Next up Dr. Gebremedhin showed his work on conductive cooling and the use of 3-D modeling bio-energetics. The last presentation was from Ignacy Misztal and he presented on their methodology to study genetics of heat tolerance using easily available weather records and pigs and cattle. We concluded with the business meeting discussed 2018 meeting locations. We will try to go to Hawaii next year (Dr. Diaz will reach out to Dr. Lee) and we voted on a new secretary with Ty Schmidt agreeing to serve as secretary for the upcoming year. We went to dinner that night as a group at La Jaquita Baya.

Friday August 3rd – The group traveled to the Southwestern part of the Island and visited the NOAA Center for Atmospheric Sciences in the Island of Magueyes. The center is managed by the University of Puerto Rico, Mayaguez Campus. We were met there by Dr. Agner Rodriguez (from University of Arizona and a member of the group). Once in the center Dr. Yasmin Detres and her colleagues gave us a tour and discussed the center work on climate change. After the meeting and tour we met for lunch at a local restaurant. We then traveled to the Cabo Rojo light house and toured the University Campus with Dr. Rodriguez. On our return drive we stopped the by the Rincon Light house.

 Saturday August 4th – The group was on their own to do some sightseeing.

 

Accomplishments

1. PI(9)- Terry Engle, Colorado State University; Objective No(s)- 1,,3; Species-Beef Cattle

Trace minerals are involved in growth, reproduction, immunity, and carbohydrate and lipid metabolism in beef cattle. Inhibiting trace mineral absorption can impact overall animal health and productivity. A key component to trace mineral absorption by an animal is solubilization of a given element within the digestive tract. We are currently examining factors that influence trace mineral solubilization and alter availability of trace minerals. Through in vitro techniques we were successful in quantifying the impact of pH, feed type, and Cu and Zn concentration on Cu and Zn solubility from various feedstuffs. The present work demonstrated significant interactions of metallic cations with several feedstuffs.

2. PI(8)-Ignacy Mitzal, University of Georgia; Objective No(s)- 2,3; Species- Swine, Cattle

 Research has focused on quantifying heat stress in beef cattle and swine species and developing genetic evaluation to select more environmentally robust animals. We have developed computer algorithm to manipulate physical and temperature images of a cow to obtain body surface area and skin surface temperature. Measured environmental (air temperature, relative humidity, air velocity) physical (body weight, surface area, hair-coat properties) and physiological (skin temperature, rectal temperature, vaginal temperature, sweating rate, respiration rate, sonogram measurements of skin, fat and muscle thicknesses) parameters.

 3. PI(2)-Robert Godfrey, SA Lakos, University of the Virgin Islands; Objective No(s)- 1,2; Species- Sheep

 The relationship between body temperature and grazing behavior of tropically adapted hair sheep ewes was evaluated using behavioral observations, GPS tracking and body temperature measurements. Ewes were evaluated 1 week each month for a year. Based on GOS tracking data it was determined that Hair sheep spent significant time in certain areas of the pasture during the day, perhaps in order to utilize shade provide by trees. Grazing behavior observations showed that these breeds of sheep are adapted to the tropical climate and can graze during the time of day with elevated THI and solar radiation. A lower body temperature, measured using vaginal temperature, of St Croix White ewes compared to that of Dorper x St Croix White ewes is likely due to their adaptation to the high heat and humidity found in the tropics.

  4. PI(4)-Henry G. Kattesh, C. Kojima; University of Tennessee; Objective No(s)- 1; Species- Cattle

 A study was initiated to investigate the vaginal endocrine response and associated bacterial interactions in beef heifers undergoing estrous synchronization and to gain a better understanding of the direct impact of CIDRs used to facilitate synchronized breeding. Serum and vaginal aspirations were collected from Spring-born heifers (n = 80) pre- and post- 7 day CO-Synch + CIDR insertion protocol. Samples are currently undergoing various endocrine and bacterial analyses.

5. PI(7)-Caddandra Tucker; University of California-Davis; Objective No(s)-: 3; Species-Cattle;

 Spraying dairy cattle with water provides physiological cooling benefits. However, work is needed to determine appropriate spraying strategies (e.g., time on and off) to improve the efficiency of heat loss and water use. Also, more efficient strategies should be evaluated to minimize water and energy use. Tested the effects of different flow rates and timing intervals on cattle behavior and physiology. Begun to test the effects of innovative cooling strategies that use less water and energy (conduction, air convection) on cattle behavior and physiology; and effects of supplementary air flow at the feed bunk when using sprayed water.

6. PI(1)-Dustin Yates, Kent Eskridge, Tay Schmidt and Jessica Petersen, University of Nebraska AES; Objective No(s)- 1,2,3 ; Species-Cattle, Sheep

  Animal adaption to heat stress may be characterized by morning and afternoon lags of animal temperature to air temperature where a well-adapted animal will have a long morning lag and a short afternoon lag. The intent is to develop innovative methods of estimating and using lags to characterize heat stress in cattle. A piecewise regression method was developed to estimate and test morning and afternoon lags, and a cluster analysis method, was developed to categorize animals into four levels of heat stress as a possible management tool. The method is being applied to data from US MARC animal heat stress experiments. A permutation test for testing the existence of the change points in a segmented regression was developed and evaluated via simulation. A novel quadratic segmented regression approach was developed and compared to linear segmented regression and previously used hysteresis models via simulation and applied to cattle heat stress data. Cattle from a heat stress experiment were clustered into 4 heat stress categories (normal, alert, danger, emergency) using the estimated morning and afternoon lag values based on segmented regression.

 7. PI(10)-Benjamin Renquist; University of Arizona; Objective No(s)- 1 ; Species- Cattle, Mice

 Our project aims to understand the mechanism by which feed intake and milk production are decreased in response to heat exposure. We established that Beta-OH butyrate is not involved in the hypophagia of heat stress. We developed a model of heat stress and pair feeding hypogalactia that mirrors the heat stressed cow.

 8. Lindsey E. Hulbert, Luis Mendonca; Kansas State University; Objective No(s)- 1,2 ; Species- Cattle

Our projects address heat stress abatement methods for dairy cattle, hematological markers of stress and health, as well as management practices, such as weaning commingling. We published our review for the stress and management of calves, and 2 manuscripts on regarding the effects of space allowance on calf health, performance, and immunity. We also submitted manuscripts which were conducted in commercial farms comparing THI obtained from weather station, vaginal temperature, THI from a logger fastened to the cow and THI at the pen level.

 9. PI(6)-Abner Rodriguez, John Fernandez, and Luis Solorzano; University of Puerto Rico-Mayaguez; Objectives No(s)- 1,3 ; Species Sheep, Goats

 It is necessary design production systems for sheep and goats raised under heat stress to enhance sheep and goat production (meat and milk) in tropical climates. For the implementation of these systems, it is essential to establish a baseline of the physiological parameters (rectal temperature, respiration rate and hearth rate) associated with heat stress in sheep and goats, and evaluate management and feeding strategies to enhance their comfort and performance. The physiological parameters associated with heat stress in native and pygmy goats raised under tropical climates were compared. The physiological parameters of lambs, ewes and rams raised under tropical climates were established also. The effect of adding fat sources in the diets on physiological parameters, dry matter and water intake, and nutrient digestibility in growing lambs were evaluated.

 10. PI(3)-Jay Johnson, Susan Ericher, Donald Lay Jr.; USDA-ARS Livestock Behavior Research Unit, Indiana Objective No(s)- 1,3 ; Species-Swine, Cattle

 Our projects are focused on addressing welfare concerns for food producing animals in three significant areas: 1) instances in which animals may experience pain or distress, 2) morbidity or mortality, and 3) the deleterious effects caused by climate variability. Results from the research directly address the public’s concerns relative to animal welfare which are being raised across the United States and globally. Developed and tested a natural antibiotic alternative that improves the health and productivity of piglets following weaning and transport similarly to traditional dietary antibiotics. Developed implantable temperature monitor for pigs that allow researchers to continuously collect vaginal temperature without disturbing animals. Development of cooling pads to reduce the impact of heat stress on lactating sows. Determined that in utero heat stress increases (12.1%) maintenance costs in pigs during postnatal life. Determined leukocyte response to chronic pain condition (concrete flooring) and substance P. Found that weaning and nursery aged piglets could be easily loaded to a height of 8 feet using a mechanical conveyor that would take them to the top without them having to walk the steep angle.

  11. PI(5)-Yuzhi Li; Lee Johnston, Larry Jacobson, Wayne Martin; University of Minnesota; Objective No(s)- 1,3 ; Species- Swine

 The overall goal of this project is to develop an effective and animal welfare-friendly measure to prevent tail biting in pigs. The impact of tail docking on performance and welfare of pigs will be evaluated; effects of tail biting on pain, stress, and performance of victimized pigs will be assessed; and development of tail biting behavior will be investigated to predict and manage tail biters. Behavior, skin lesions, tail damage, growth performance, and carcass traits were compared between pigs (n= 336, initial wt = 8 kg; and n = 240, initial wt = 25 kg) with docked tails and intact tails. Tail docking reduced tail biting behavior and incidence of tail damage, but did not affect other behaviors, growth performance, skin lesions or carcass traits. Pain (Substance P), stress and immune function (Total serum protein, Ig-G) of tail biters (n = 11), victimized pigs (n = 30) and control pigs (n = 27) were compared. Tail biters had lower total serum protein and Ig-G compared with other pigs, suggesting that poor immune function may predispose pigs to tail biting. Behavior of pigs (8 pens, 30 pigs/pen) with docked tails and intact tails were monitored by video-recording for 13 weeks at 3-day intervals. Data were analyzed using both a traditional method (scan sampling) and optical flow analysis. Before outbreaks of tail biting, pigs increased their activity levels which could be detected by optical flow measures. Social network analysis was conducted to evaluate social structure of pigs (12 pens, 8 pigs/pen) in pens with tail biting vs in pens without tail biting. Pigs in tail biting pens were less socially connected, suggesting that social isolation may be associated with development of tail biting.

 12. PI(9)- Kifle G. Gebremedhin; Cornell University; Objective No(s). 1,2,3 ; Species-Cattle

 Conductive cooling is an effective heat stress mitigating mechanism for high-producing dairy cows. The system provides some comfort to the cows as demonstrated by increased milk production and decreased internal body temperature and respiration rate. The effectiveness of conductive cooling can also be measured by the amount of heat of metabolism that can be dissipated, which is up to 60%. Another important concern to farmers is if condensation occurs during conductive cooling. Our results with two types of bedding (sand and sawdust) and 4 bedding thickness show that condensation will not be an issue in the system employed in this study. Cornell has been working on objectives 1 and 3. We have conducted experimental work on collecting environmental, physical and physiological measurements. We have developed computer algorithm to manipulate physical and temperature images of a cow to obtain body surface area and skin surface temperature. Measured environmental (air temperature, relative humidity, air velocity) physical (body weight, surface area, hair-coat properties) and physiological (skin temperature, rectal temperature, vaginal temperature, sweating rate, respiration rate, sonogram measurements of skin, fat and muscle thicknesses) parameters.

Impacts

  1. (1-3 Eskridge group) Simulations reveal that the proposed test controls type I error better than the competitor under testing zero change point versus one or two change points.
  2. Overall, we found that the piecewise regression lags models are efficient for obtaining the lags in comparison with previously used hysteresis models.
  3. We found that the dark-colored animals of MARC III (dark-red) and Angus (black) suffered most from heat stress followed by the light-colored animals of MARC I (tan), and Charolais (white). In the emergency level, the body temperatures lagged behind air temperatures less than four hours in the morning and greater than four hours in the afternoon. This approach aids with identifying animals which are the most susceptible to heat stress which is important to saving resources from death and economic losses.
  4. (4-6 Godfrey group) Even though the hair sheep are tropical breeds they still utilize shade at various times throughout the day to deal with the tropical environment.
  5. Hair sheep will graze during period of high temperature and solar radiation which further adds to the knowledge on their tropical adaptation.
  6. The difference in body temperature between genotypes further supports the tropical adaptation of the St Croix White hair breed compared to even other hair breeds.
  7. (7-12 Johnson Group) In addition to improving animal well-being and productivity, replacing traditional dietary antibiotics with 0.20% L-glutamine reduces feed costs for producers by 18% (on a per ton basis).
  8. Devices reduce the labor associated with body temperature data collection and improve data accuracy.
  9. Cooling pads provide producers with an effective management solution to mitigate the negative impact of heat stress on lactating sows.
  10. An increase in maintenance costs due to gestational heat stress would reduce feed efficiency, increase time to market, and reduce overall profitability for swine producers.
  11. Leukocyte phenotypes and responses to substance P are altered by flooring, showing how chronic pain affect immunity.
  12. Data can be used in the development of automated handling methods that can be used to decrease the stress pigs are exposed to during loading for transport.
  13. (13 Kattesh group) The results of this study will contribute to the overall understanding of the impact of CIDR insertion on local endocrine responses and bacterial interactions within the bovine vaginal cavity, which may lead to improving the reproductive success of cattle.
  14. (14-17 Li group) Results will help swine producers understand that removing tail docking without environmental enrichment will cause tail biting among pigs under confinement conditions.
  15. Results may lead us to reveal the underlining mechanisms for development of abnormal behaviors.
  16. Swine producers may predict outbreak of tail biting by monitoring changes in activity levels of pigs.
  17. Results indicate that social stress can be measured through social network analysis, and social structures of groups and social positions of individuals may be important to animal welfare.
  18. (18 Rodriguez group) Native crossbred sheep are capable to consume of 4% total body weigh (DMB) under heat stress conditions. Adding fat sources to the diet did not improve physiological parameters values associated with heat stress in lambs. Selected appropriate small ruminant animal types (goat and sheep) might be more tolerant to the tropical environment heat stress than large ruminants.
  19. (19-20 Tucker group) Higher flow rate (4.9 vs. 3.3 L/min) usually tended to be better for cooling cattle but differences were small, and biological relevance is unclear. When spraying same amount of water, timing had no effect on cattle responses to heat load and production. All cows were cool, relative to other studies (using 44.1 or 73.5 L of water/d per nozzle).
  20. When using innovative cooling strategies, supplementary spray water was necessary when air temperature was ≥30 ºC to prevent signs of panting.
  21. (21 Engle group) Understanding the solubility of trace minerals from a variety of feedstuffs under different simulated gastrointestinal conditions can help to improve the accuracy of dietary mineral formulation.
  22. (22-23 Renquist group) By eliminating BHB in the hypophagia of heat stress we were able to move forward to assess the role of central nervous system histamine signaling.
  23. This allows us to use genetic mouse models to better understand the hypogalactia in the cow.
  24. (24 Hulbert group) On August 8, 2017, Journal of Dairy Science reported that the Hulbert and Moisa (2016) manuscript was among the top 100 of the journal’s most highly cited papers published since the beginning of 2014.

Publications

Publications/Thesis/Dissertations

 

Kismiantini, "Methods for detecting time lags in animal temperature regulation" (2017). Univ. of Nebraska, Lincoln (Dissertation).

Godfrey, R.W., W.D. Preston, S.R. Joseph, L. LaPlace, P.E. Hillman, K.G. Gebremedhin, C.N. Lee, and R.J. Collier. 2017. Evaluating the impact of breed, pregnancy and hair coat on body temperature and sweating rate of hair sheep ewes in the tropics. J. Anim. Sci. 95:2936-2942. doi:10.2527/jas2016.1125

Godfrey, R.W., W. Preston, A. Hogg, S. Joseph, L. Laplace, P. Hillman, K. Gebremedhin, C. Lee and R. Collier. 2016. Evaluating the impact of breed, pregnancy and hair coat on body temperature and sweating rate of hair sheep ewes in the tropics. UVI-AES Annual Report pp. 20-26. (Extension Pub.)

Johnson, J.S., and D.C. Lay Jr. 2016. Evaluating the behavior, growth performance, immune parameters, and intestinal morphology of weaned piglets after simulated transport and heat stress   when antibiotics are eliminated from the starter diet or replaced with L-glutamine. J. Anim. Sci. 95:91-102. doi: 10.2527/jas2016.1070

Johnson, J.S., and K.A. Shade. 2017. Characterizing body temperature and activity changes at the onset of estrus in replacement gilts. Livestock Sci. 199: 22-24.

Cabezon, F.A. A.P. Schinckel, A.J. Smith, J.N. Marchant-Forde, J.S. Johnson, and R.M. Stwalley. 2017. Initial evaluation of floor cooling on lactating sows under severe acute heat stress. Prof. Anim. Sci. 33:254-260.

Calvo-Lorenzo, M. S. , L. E. Hulbert, M. A. Ballou, A. L. Fowler, Y. Luo, K. C. Klasing, and F. M. Mitloehner. 2017. Space allowance influences individually housed Holstein bull calf innate immune measures and standing behaviors after castration at 3 weeks of age. J. Dairy Sci. 100: 2157-2169. http://doi.org/10.3168/jds.2016-11833.

Calvo-Lorenzo, M.S., L.E. Hulbert, A.L. Fowler, A. Louie, L. J. Gershwin, K. E. Pinkerton, M. A. Ballou, K. C. Klasing, and F. M. Mitloehner. 2016. Wooden hutch space allowance influences male Holstein calf health, performance, daily lying time, and respiratory immunity. J. Dairy Sci. 99:4678-4692 http://dx.doi.org/10.3168/jds.2016-10888 .

Chapel. N.C., C.J. Byrd, D.W. Lugar, G.M. Morello, L.H. Baumgard, J.W. Ross,

T.J. Safranski, M.C. Lucy, and J.S. Johnson. 2017. Characterizing the effects of early gestation heat stress on postnatal fasting heat production and circulating biomarkers associated with metabolism in growing pigs. J. Anim. Sci. In press.

Eicher, S. D., M. H. Rostagno, and D. C. Lay, Jr. 2017. Feed withdrawal and transportation effects on Salmonella enterica levels in market-weight pigs. J. Anim. Sci. Doi:10.2527/jas.2017.1454

Hulbert, L.E. and S.J. Moisá. 2016. Stress, immunity and the management of calves. 2016 J. Dairy Sci. 99:3199-3216 doi:10.3168/jds.2015-10198.

Lay Jr., D.C., A. Sapkota, and S.A. Enneking. 2017. Testing the feasibility of using a conveyor belt to load weanling and nursery pigs for transportation. Transl. Anim. Sci. 1: doi:10.2527/tas2017.0033

 Love, W.J., T.W. Lehenbauer, B.M. Karle, L.E. Hulbert, Randy Anderson, A.L. Van Eenenaam, T.B. Farver, S.S. Aly. 2016. Survey of dairy practices associated with respiratory health of pre-weaned calves on California dairies. J. Dairy Sci. 99:1483-1494 doi:10.3168/jds.2015-9394.

Petrosus, E. 2016. The effects of cortisol and norepinephrine on weanling piglets and the selection of an anxiolytic probiotic. (Dissertations)

Petrosus, E., S. Eicher, and M. Erasmus. 2017. Gut feelings: How probiotics may improve animal welfare. Purdue Extension. AS-364-W. (Extension Pub)

Lockwood, S. A., H. G. Kattesh, J. D. Rhinehart, L. G. Strickland, J. B. Wilkerson, P. D. Krawczel, F. D. Kirkpatrick, and A. M. Saxton. 2016. Relationships among temperament, acute and chronic cortisol concentrations, and breeding soundness during performance testing of bulls. Theriogenology. 89:140-45.

Pighetti, G. M., L. Wojakiewicz, S. I. Headrick, O. Kerro Dego, S. S. Lockwood, H. G. Kattesh, M. J. Lewis, C. D. Young, L. J. Siebert, B. E. Gillespie, M. E. Prado, R. A. Almeida, and S. P. Oliver. 2017. Vaccination with recombinant Streptococcus uberis adhesion molecule (rSUAM) alters         cytokine profiles during experimental challenge.Inter. J. Vet. & Dairy Sci.

https://www.clytoaccess.com/articles/vaccination-recombinant-streptococcus-uberis-adhesion-molecule-alters-immune-response

Li, Y. Z., K. A. McDonald, and H. W. Gonyou. 2017. Determining feeder space allowance across feed forms and water availability in the feeder for growing-finishing pigs. J. Swine Health Prod. 25: 174-182

Li, Y. Z., H. F. Zhang, L. Johnston, L. Jacobson, and W. Martin. 2016. Tail biting in growing-finishing pigs. Final Report to National Pork Board. (Extension Pub.)

Li, Y. Z., J. Brown, L. Johnston, T. Parsons, T. Safranski, and Y. Seddon. 2016. Floor Feeding – A Guide for Managing Sows. National Pork Board #004934; Clive, IA. 12/2016. (Extension Pub.)

Zhang, H. F., J. Wang, L. Wan, and Y. Z. Li. 2016. Consumers’ preferences and willingness to pay for traceable pork in Guangzou (China). Guangdong Agricultural Science 43: 183-192 (in Chinese). (Extension Pub.)

Abner Rodriguez. Measuring physiological parameters associate with heat stress in goats Bulletin SEA, Caprinos UPRM, Vol 1; No 2. 2017. (Extension Pub.)

Tresoldi, G., Schütz, K. E., and C. B. Tucker. Assessing heat load in drylot dairy cattle: Refining on-farm sampling methodology. J. Dairy Sci. 99:8970-8980.

Chen, J. M., Schütz, K. E., and C. B. Tucker. Comparison of instantaneous sampling and continuous observation of dairy cattle behavior in freestall housing. J. Dairy Sci. 99:8341-8346.

Tresoldi, G., Schütz, K. E., and C. B. Tucker. Cow cooling on commercial drylot dairies: a description of 10 farms in California. Calif. Agric. (accepted)

Kistner, M. J., J. J. Wagner, J. Evans, S. Chalberg, S. Jalali, K. Sellins, M. L. Kesel, T. Holt, and T.E. Engle. 2017. The effects of molybdenum water concentration on feedlot performance, tissue mineral concentrations, and carcass quality of feedlot steers. J. Anim. Sci. (In press)

Caldera, E., J. J. Wagner, K. Sellins, S. B. Laudert, J. W. Spears, S. L. Archibeque, and T. E. Engle. 2017. Effects of supplemental zinc, copper, and manganese concentration and source on performance and carcass characteristics of feedlot steers. Prof. Anim. Sci. 33:63-72.

Davis, B. P., T. E. Engle, J. I. Ransom, and T. Grandin. 2017. Preliminary evaluation of the effectiveness of varying doses of supplemental tryptophan as a calmative in horses. App. Anim. Behav. Sci. 188:34-41.

Wagner, J. J., T. E. Engle, C. R. Belknap, and K. L. Dorton. 2016. Meta-analysis examining the effects of Saccharomyces cerevisiae fermentation products on feedlot performance and carcass traits. Prof. Anim. Sci. 32:172-182.

The effects of molybdenum water concentration on feedlot performance, tissue mineral concentration, and carcass quality of feedlot steers. (PI-Engle) (Dissertation)

Hepler, C., C.E. Foy, M.R. Higgins, and B.J. Renquist. 2017. The hypophagic response to heat stress is not mediated by GPR109A or peripheral beta-OH butyrate. Am. J. Phys. Reg. Int. and Comp. Phys.  301:R992.

Geisler, C.E. 2016. THE ROLE OF KETONE SIGNALING IN THE HEPATIC RESPONSE TO FASTING. University of Arizona (PI-Renquist) (Dissertation)

Collier, R.J., T.R. Bilby, B.J. Renquist. 2017.  Emerging Trends in Agriculture. Proc. 5th International Symposium on Dairy Cow Nutrition and Milk Quality. Ed. J. Wang, N.Sheng, S. Zhao, and A. Kurtz. Beijing, China.  pg. 3-19.

 

Abstracts/Presentations

Godfrey, R. W., A. Nero, G. Roberts and S. A. Lakos. 2017. Evaluating the relationship between environment and body temperature of hair sheep ewes in the tropics. J. Anim. Sci. 95(Suppl. 1):247 doi:10.2527/asasann.2017.506

Godfrey, R. W., A. Nero, G. Roberts and S. A. Lakos. 2017. Tracking the movement of hair sheep grazing in pastures in the tropics. 95(Suppl. 1):251 doi:10.2527/asasann.2017.514

Godfrey, R. W., A. Nero, G. Roberts and S. A. Lakos. 2017. Evaluation of the grazing behavior of hair sheep in the tropics. J. Anim. Sci. 95(Suppl. 1):251 doi:10.2527/asasann.2017.515

Shade, K.A., K.R. Stewart, and J.S. Johnson. 2016. Characterizing body temperature and movement differences at the onset of estrus in replacement gilts. J. Anim. Sci. 94:194. doi: 10.2527/msasas2016-415.

Johnson, J.S., K.L. Martin, and K.R. Stewart. 2016. Rapid fluctuations in ambient temperature before conception reduce future fetal viability in replacement gilts. J. Anim. Sci. 94: 153. doi: 10.2527/msasas2016-326.

Johnson, J.S., C.J. Byrd, and N.M. Chapel. 2016. Effects of a 48h feed withdrawal on intraperitoneal core body temperature in growing pigs. J. Anim. Sci. 94 (suppl. 5).

Johnson, J.S., and D.C. Lay Jr. 2017. Evaluating the health and productivity of weaned piglets after simulated transport and heat stress when antibiotics are eliminated from the diet. J. Anim. Sci. 95:6.

Chapel, N.M., C.J. Byrd, D.W. Lugar, K.R. Stewart, M.C. Lucy, T.J. Safranski, L.H. Baumgard, and J.S. Johnson. 2017. The effects of in utero heat stress on fasting heat production in growing pigs. J. Anim. Sci. 95: 131.

Smith, A.J., F.A. Cabezon, A.P. Schinckel, J.N. Marchant-Forde, J.S. Johnson, and R.M. Stwalley. 2017. Initial evaluation of floor cooling on lactating sows under acute heat stress. J. Anim. Sci. 95:183-184.

Cabezon, F.A., A.P. Schinkel, J.N. Marchant-Forde, J.S. Johnson, and R.M.

Stwalley. Effects of floor cooling on late lactation sows under acute heat stress. J. Anim. Sci. 95:55.

Kpodo, K.R., A.W. Duttlinger, and J.S. Johnson. 2017. Pen location affects thermoregulation and feed efficiency in swine during late summer. J. Anim. Sci. In press.

Duttlinger, A.W., K.R. Kpodo, D.C. Lay Jr., B.T. Richert, and J.S. Johnson. 2017.

Replacing dietary antibiotics with 0.20% L-glutamine in swine nursery diets: Impact on health and productivity of pigs following weaning and transport during the summer. J. Anim. Sci. In press.

Byrd, C.J., N.M. Chapel, D.W. Lugar, M.C. Lucy, T.J. Safranski, and J.S. Johnson. It’s getting hot in here: A preliminary study to evaluate the impact of in utero heat stress on piglet behavior after weaning and transport. Regional Meeting of the International Society for Applied Ethology.

Petrosus, E., E. Silva, D. Lay, Jr, M. Rostagno, and S. Eicher. 2016.  Norepinephrine and cortisol influence Lactobacillus populations in weaned piglets. Program and Proceedings: 97th Annual meeting of the Conference of Research Workers in Animal Diseases: pp 67. Chicago, Dec. 4, 2016.

Eicher, S., E. Petrosus, D. Lay, Jr., M. Rostagno, and E. Silva. 2016. Stress hormones differentially alter gut microbes over time and affect Salmonella counts in weaned pigs. Program and Proceedings: 97th Annual meeting of the Conference of Research Workers in Animal Diseases:pp 43. Chicago, Dec. 6, 2016.

Eicher, S. E. Silva, M. M. Schutz, and J. N. Marchant-Forde. 2016. Chronic Pain: Leukocyte and neurochemical interactions. International Veterinary Immunological Symposium. Gold Coast, AU.

Garvey, M., E. Petrosus, J. N. Marchant-Forde, and S. Eicher. 2017. Effects of probiotics on anxiety-like behavior in weaned pigs. Regional Meeting of the International Society for Applied Ethology.

Garvey, M., and S. Eicher. 2017. A Seat at the Table: Considerations for International Animal Welfare. Purdue Center for Animal Welfare Science Annual Symposium.

McAfee, J. M., H. G. Kattesh, M. D. Lindemann, B. H. Voy, C. J. Kojima, N.C. Burdick Sanchez, J. A. Carroll, B. E. Gillespie, and A. M. Saxton. 2017. Effect of omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementation to lactating sows on growth and indicators of stress in the post-weaned pig. J. Anim. Sci. 95 (E-Suppl. 1):30.

Godfrey, R. W., S.R. Joseph, J.A. Martinez, S.A. Lakos, H.C. Nelthropp, R.L. Stanko, H.G Kattesh, S.A. Lockwood, and B. E. Gillespie. 2017. Evaluation of the effect of hot iron branding on cortisol and corticosteroid-binding globulin concentrations in young Senepol cattle. J. Anim. Sci. 95 (E-Suppl. 1):34.

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