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Translational Animal Science : Just Published

 

Accepted, edited articles are published here after author proofing to provide rapid publication and better access to the newest research. Articles are compiled into issues at dl.sciencesocieties.org/publications/tas, which includes the complete archive.

Citation | Articles posted here are considered published and may be cited by the doi.

Current issue: 1(2)



    • E. G. Taylor, R. P. Lemenager and K. R. Stewart
      Using corn gluten feed in post-partum diets of young beef cows to optimize reproductive performance

      Forty-eight primiparous and diparous Angus-Simmental cows were fed 1 of 3 diets; 1) total mixed ration (TMR) based of corn silage and corn stalks (CON), 2) TMR with 3.3 kg/d DM of corn gluten feed (CGF; MID), or 3) TMR with 6.7 kg/d DM of CGF (HIGH). From 11 ± 5 days post-partum (DPP) to 105 ± 5 DPP, all diets were formulated to be isocaloric for a post-partum ADG targeted at 0.22 kg, but CP exceeded requirements in both CGF diets. Blood samples were collected from cows starting at trial initiation until estrous synchronization for determination of plasma progesterone concentration (7 d intervals), as an indicator of resumption of cyclicity, as well as for plasma urea nitrogen (PUN; 21 d intervals). Milk production was assessed at 62 ± 5 DPP via a weigh-suckle-weigh procedure, and milk samples were collected at 64 ± 5 DPP for composition analysis. (continued)


      doi:10.2527/tas2017.0034
      Published: July 13, 2017



    • E. J. McCoy, T. G. O’Quinn, E. F. Schwandt, C. D. Reinhardt and D. U. Thomson
      Effects of liver abscess severity and quality grade on meat tenderness and sensory attributes in commercially finished beef cattle fed without tylosin phosphate

      Strip loin steaks (n = 119) were used to evaluate the association between liver abscess severity and USDA quality grade and meat tenderness and sensory attributes of steaks from finished feedlot cattle. Steaks were used in a 3 × 2 factorial treatment structure using a completely randomized design and were collected at a commercial abattoir located in northwest Texas. All cattle were sourced from a single feedlot and fed a common diet that did not include tylosin phosphate. Treatments were USDA quality grades of Select (SEL) and Low Choice (LC) and liver abscess scores of normal (NORM; healthy liver, no abscesses), mild (M; 1 abscess less than 2 cm in diameter to 4 abscesses less than 4 cm in diameter), and severe (SV; 1 abscess greater than 4 cm in diameter or greater than 4 small abscesses). (continued)


      doi:10.2527/tas2017.0036
      Published: July 6, 2017



    • K. J. McLean, M. S. Crouse, M. R. Crosswhite, D. N. Black, C. R. Dahlen, P. P. Borowicz, L. P. Reynolds, A. K. Ward, B. W. Neville and J. S. Caton
      Endogenous retroviral gene elements ( syncytin-Rum1 and BERV-K1 ), interferon- τ , and pregnancy associated glycoprotein-1 are differentially expressed in maternal and fetal tissues during the first 50 days of gestation in beef heifers

      We hypothesized that the endogenous retroviruses [ERV: syncytin-Rum1 and (BERV-K1)], and pregnancy hormones [interferon-τ (IFN-τ), and pregnancy associated glycoprotein-1 (PAG-1)] would be differentially expressed whereas progesterone and insulin concentrations in maternal blood would remain steady during early gestation. To test this hypothesis Angus crossbred heifers (n = 46; ∼15 mo of age; BW = 363 ± 35 kg) were fed native grass hay, supplemented with cracked corn to gain 0.3 kg/d, and given ad libitum access to water. All heifers were subjected to a 5-d CO-Synch + CIDR estrous synchronization protocol and AI (breeding = d 0). Ovariohysterectomies were performed on d 16, 22, 28, 34, 40, and 50 of gestation and at d 16 of the estrous cycle for non-pregnant (NP) controls. (continued)


      doi:10.2527/tas2017.0026
      Published: June 22, 2017



    • M. J. Powell, C. Yuan, R. S. Dzikamunhenga, R. Tarté, E. Huff-Lonergan, S. M. Lonergan and A. M. O’Connor
      A systematic review and meta-analysis of tenderness metrics in control groups used in comparative nutrition experiments ,

      This review reports the pork quality attributes, Warner-Bratzler Shear Force, Slice Shear Force, Star Probe, pH, marbling, color (Minolta L*/L or Hunter L*/L), and sensory tenderness evaluation, in control groups used in comparative nutrition experiments over the past 20 yr. The original aim of this study was to evaluate if changes in pork quality based on the above metrics occurred over time. To address this question, it was anticipated that data may come from 3 sources with decreasing relevance: representative retail pork surveys, representative post-harvest carcass surveys, and control groups from comparative nutrition experiments. To identify the study population, a review of studies reported in Centre for Agricultural Biosciences International Abstracts (Web of Knowledge; 1994–2014) was conducted. (continued)


      doi:10.2527/tas2017.0031
      Published: June 22, 2017



    • J. A. De Jong, J. C. Woodworth, J. M. DeRouchey, R. D. Goodband, M. D. Tokach, S. S. Dritz, C. R. Stark and C. K. Jones
      Stability of four commercial phytase products under increasing thermal conditioning temperatures

      Phytase is a feed-grade enzyme frequently added to swine diets to help improve the digestibility of phytate phosphorus. However, like any enzyme, it may be subject to heat damage when exposed to thermal processing. Therefore the objective of this experiment was to determine the stability of 4 commercial phytase products exposed to increasing thermal conditioning temperatures in the pelleting process. The 4 commercial products used were: Quantum Blue G (AB Vista, Plantation, FL); Ronozyme Hi Phos GT (DSM Nutritional Products, Parsippany, NJ); Axtra Phy TPT (Dupont, Wilmington, DE), and Microtech 5000 Plus (Guangdong Vtr Bio-Tech Co., Ltd., Guangdong, China). (continued)


      doi:10.2527/tas2017.0030
      Published: June 15, 2017



    • A. R. Bayat, L. Ventto, P. Kairenius, T. Stefański, H. Leskinen, I. Tapio, E. Negussie, J. Vilkki and K. J. Shingfield
      Dietary forage to concentrate ratio and sunflower oil supplement alter rumen fermentation, ruminal methane emissions, and nutrient utilization in lactating cows

      The effects of supplementing high- or low-concentrate diets with sunflower oil (SO) on rumen fermentation, nutrient utilization, and ruminal methane (CH4) emissions in lactating cows were examined. Four multiparous Nordic Red dairy cows fitted with rumen cannulae were used in a 4 × 4 Latin square with a 2 × 2 factorial arrangement of treatments and 35-d periods. Experimental treatments comprised iso-nitrogenous total mixed rations based on grass silage with forage to concentrate ratio of 65:35 or 35:65 supplemented with 0 or 50 g/kg diet DM of SO. Apparent ruminal OM and starch digestibility was greater (P < 0.05) with high- than low-concentrate diets but was unaffected by SO. (continued)


      doi:10.2527/tas2017.0032
      Published: June 15, 2017



    • J. W. Oltjen, L. C. Forero and J. W. Stackhouse
      Decision Making Tools: BeefTracker mobile app for tracking and analysis of beef herd pasture use and location

      Beef Tracker is a web-based mapping platform that provides beef cattle ranchers a tool to demonstrate that cattle production fits within sustainable ecosystems and to provide regional data to update beef sustainability lifecycle analysis. After digitizing pastures, herd data (class and number of animals) are input on a mobile device in a graphical pasture interface, stored in the cloud, and linked via the web to a personal computer for inventory tracking and analysis. Pasture use calculated on an animal basis provides quantifiable data regarding carrying capacity and beef production. This data is sought by the National Beef Cattle Association to provide more accurate inputs for beef sustainability lifecycle analyses. (continued)


      doi:10.2527/tas2017.0027
      Published: June 15, 2017



    • D. C. Lay Jr., A. Sapkota and S. A. Enneking
      Testing the feasibility of using a conveyor belt to load weanling and nursery pigs for transportation

      Transportation is known to be a multi-faceted stressor, with the process of loading being one of the most significant factors impacting the stress to which animals are exposed. This project was designed to determine if using a conveyor to load pigs into the top deck of a simulated straight deck trailer could lower the stress to which pigs and handlers are exposed. Pigs were assigned to either a Control group that were herded up a stationary conveyor ramp into a top deck trailer (2.5 m above the ground); or Conveyor group which were herded onto a mobile conveyor into a top deck trailer. The conveyor was 7.6 m long, 0.9 m wide and rose to 2.5 m high at a 16° slope, and moved 11.3 m/min. (continued)


      doi:10.2527/tas2017.0033
      Published: June 15, 2017