Life Sciences Commons^™

Effect Of Lighter (273 Kg) And Heavier (356 Kg) Initial Weight On Growth Performance Of Single-Source, Pre-Conditioned Beef Steers Fed A Single Growing-Finishing Diet, Thomas C. Norman

Electronic Theses and Dissertations

The objective of the study was to determine the influence that initial BW has on growth performance responses, efficiency of dietary net energy (NE) utilization, and carcass traits in feedlot steers. Light- and heavy-weight Charolais×Red Angus steers (n = 70) selected from a larger single-source group were used in a 209-d growing-finishing feedlot experiment at the Ruminant Nutrition Center, in Brookings, SD. On d-0 and d-1 weight and hip height (HH) measurements were collected for allotment purposes; the initial experimental weight was the average between d 0 and d 1 BW. Steers were assigned to two groups based on initial …

Diet And Management Strategies To Mitigate Decreased Feed Intake Associated With Terminal Implant Administration In Finishing Beef Steers, Alexandria M. Kelly

Electronic Theses and Dissertations

Terminal implant administration in beef steers often leads to decreased feed intake, leading to less growth. Our objective was to identify diet and management changes that can mitigate this decrease in feed intake. Single-sourced Angus x Simmental steers (n=27, initial BW= 385.1 ± 30.8 kg) were utilized in a completely randomized trial to assess the effects of animal movement and increased forage inclusion on rumination and feed intake after re-implanting. Steers were initially implanted with Synovex Choice (100 mg trenbolone acetate and 14 mg estradiol benzoate; Zoetis, Parsippany, NJ), then reimplanted 88 d later with Synovex Plus (200 mg trenbolone …

Addressing Soil Carbon Sequestration Response From Multispecies Dairy Forage Systems And Modeling Rangeland Beef Cow Dry Matter Intake Using Precision Enteric Emissions Measurements, Lillian J. Mcfadden

Electronic Theses and Dissertations

Regenerative agriculture is a pressing matter for the dairy industry to address cropland sustainability and carbon sequestration. One regenerative management practice that has been identified to help with row crop sustainability for key metrics like soil organic carbon (SOC) is complex covers. When producers use complex covers one of the main challenges is that it takes time to detect a change in SOC. However, simulation models are a tool that can be used to help determine if a regenerative practice is a strategy that gives the best results (i.e., increased SOC) while aligning with long-term production goals. Therefore, our objectives …

Evaluating Precision Supplementation Technology And Mathematical Nutrition Models For The Development Of Heifers Grazing Dormant Rangeland In Western South Dakota, Anna Katherine Dagel

Electronic Theses and Dissertations

The Great Plains supports about 40-50% of beef cattle production in the United States. Consequently, the beef cow-calf sector provides a large economic impact for states located within the Northern Great Plains (South Dakota Department of Agriculture, 2021). Producing profitable rangeland beef cattle through an economically efficient cowcalf operation presents several challenges. These challenges include providing adequate nutrition to meet the needs of growing heifers on rangelands, which requires additional labor and feed/supplement to achieve desired rates of gain and reach a target body weight, resulting in reproductive success. Implementation of precision livestock technology (PLT) and the use of precision …

Evaluation Of Precision Ingredient Inclusion On Production Efficiency Responses In Finishing Beef Cattle, Santana R. Hanson

Electronic Theses and Dissertations

Two randomized complete block design feedlot experiments were conducted over the course of two years. These experiments were conducted to investigate the effects of 1) evaluate the observed-to-expected ratio for ingredient inclusion using no commodity inclusion assistance technology or using commodity inclusion assistance technology; and 2) evaluate the influence that varying degrees (highly variable at random or 0.454 kg asfed tolerance for each ingredient) of accuracy on ingredient inclusion have on growth performance, carcass traits, efficiency of dietary NE utilization, and ingredient inventory management in finishing beef cattle. Experiment 1 used single source Black Angus heifers (n = 60; initial …

The Effects Of Body Weight, Feed Intake, And Weather On Total And Liquid Water Intake In Growing Beef Cattle, Madison Rae Kovarna

Electronic Theses and Dissertations

Research conducted in the 1950s to determine water requirements utilized cattle that vary greatly from the animals being raised today. Additionally, most of the previous research has been conducted on animals being fed for slaughter, rather than bulls or reproductive females. The objective of this study was to analyze the effect of weather variables, dry matter intake (DMI), and body weight (BW) on total daily water intake (TDWI) and liquid daily water intake (LDWI) in growing beef bulls and heifers. Two contemporary groups of Angus and Simmental x Angus bulls and heifers over a two-year period were utilized in this …

Identification Of Genes Expressed In The Anterior Pituitary Associated With Water Restriction In Beef Cattle, Himali Chathurika Wickramasinghe Vithana Arachchilage

Electronic Theses and Dissertations

Water is an essential nutrient and is required for growth, metabolism, lactation, and reproduction. Without water, livestock production would not be possible. Despite its importance, water requirements in livestock have not received much attention from the research community since the 1950s. The most recent edition of the Nutrient Requirements of Beef Cattle (8th edition) relies on literature from the 1950s or earlier for defining water requirements in beef cattle. Since the time these requirements were estimated, much has changed with regards to body size, genetics, and productivity of our livestock herds, including beef cattle. Global surface temperatures have increased in …

Strategies To Optimize Confinement Fed Beef Cattle In The Northern Plains, Erin R. Gubbels

Electronic Theses and Dissertations

The goal of this dissertation was to understand the strategies needed to optimize performance of confinement fed beef cattle in the Northern Plains. This was accomplished through three objectives: 1) evaluate health, growth performance, and antibody titers in previously vaccinated, newly weaned calves administered a respiratory and clostridia vaccine upon arrival compared to no vaccination; 2) determine the influence of manger space restriction on program-fed feedlot heifers during the growing phase; and 3) to evaluate growth performance and carcass traits following transit of feedlot heifers sourced and finished in different regions of the United States. For objective 1, single-sourced, newly …

Regional Assessment Of Live Cattle And Carcass Characteristics In The Northern Plains, Harlee A. Brauckmuller

Electronic Theses and Dissertations

The goal of this project was to perform a regional assessment of live cattle and carcass characteristics in the northern plains. The assessment audited three packing plants to assess fed cattle, cow, and bull production. The live animal factors evaluated were transportation, mobility of cattle, identification, brands, and mud/manure present. Data collected during the slaughter process was bruising, dentition, and offal condemnations. In fed cattle yield grade, quality grade, and hot carcass weight were assessed. In cows and bulls muscle score and fat color score were assessed. To assess differences between cattle in the Northern Plains and cattle in the …

Sdsu Beef Day 2022 Complete Proceedings, Department Of Animal Science, Sdsu Extension

SDSU Beef Day 2022 Summary Publication

This is the complete proceedings of the South Dakota State University, Department of Animal Science Beef Day 2022. The proceedings contain research presented on the following topics:
Feedlot
Herd Management
Meat Science and Nutrition

Impact Of Corn Silage Moisture And/Or Kernel Processing At Harvest On Finishing Steer Growth Performance, Efficiency Of Dietary Net Energy Utilization And Carcass Traits, Thomas G. Hamilton, Warren Rusche, Julie Walker, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Red Angus steers (n = 192; initial shrunk BW = 983 ± 62.3 lbs) were used in the 112 d finishing experiment at the Southeast Research Farm (SERF) of the South Dakota Agricultural Experiment Station in Beresford. Steers were from a single source and obtained from a local SD auction facility. Steers were received 2 weeks prior to trial initiation. Steers were offered a common diet containing 60% concentrate upon arrival. Steers were transitioned to a 90% concentrate diet over the course of 14 d. Steers were consuming the finishing diet (Table 1) at the initiation of the …

Evaluation Of Dietary Roughage Inclusion In A Single Or Two-Diet System For Backgrounding And Finishing, Thomas G. Hamilton, Warren Rusche, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Pre-conditioned crossbred beef steers (n = 46; initial shrunk [4%] BW = 621 ± 89.1 lbs) were used in a 210-d grow-finish experiment at the Ruminant Nutrition Center (RNC) in Brookings, SD. Steers were fed once daily, and bunks were managed according to a slick bunk management system. Cattle were fed in 25 × 25 ft concrete surface pens (n = 10 pens; 5 pens/treatment) with 25 linear ft of bunk space and heated, concrete, continuous flow waterers. Treatments included: 1) A single-diet program (targeted a 59 Mcal/cwt NEg diet fed for 210-d; 1D) or 2) two-diet program …

Dose Effects Of Encapsulated Butyric Acid And Zinc On Beef Feedlot Steer Growth Performance, Carcass Characteristics, And Dietary Net Energy Utilization, Forest L. Francis, Erin R. Gubbels, Thomas G. Hamilton, Warren Rusche, Doug Lafleur, Jerilyn E. Hergenreder, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Steers (n = 272; shrunk BW = 794 ± 163 pounds) were assigned to one of four dietary treatments in a 143.5 d feedlot finishing trial: 0 g BPZ/ kg diet dry matter (DM) (CON), 1 g BPZ/ kg diet DM (1BPZ), 2 g BPZ/ kg diet DM (2BPZ), or 3 g BPZ/ kg diet DM (3BPZ). Carcass data and liver health outcomes were collected, and feedlot growth performance data and efficiency of dietary net energy utilization were calculated on a carcass-adjusted basis.

Evaluation Of A Direct Fed Microbial And/Or An Enzymatically Hydrolyzed Yeast Product In Diets Containing Monensin Sodium On Feedlot Phase Growth Performance, Efficiency Of Dietary Net Energy Utilization, And Carcass Characteristics In Newly Weaned Beef Steers Fed In Confinement For 258 Days, Erin Gubbels, Forest Francis, Thomas G. Hamilton, Jason Griffin, Warren Rusche, Tom Rehberger, Elliot Block, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Single-sourced, newly weaned steers (n = 256; initial body weight (BW) = 542 ± 3.7 lb) were allotted to 32 pens (n = 8 pens/treatment with 8 steers/pen). Steers were blocked by location in a 2x2 factorial treatment arrangement of DFM (Certillus CP B1801 Dry; Bacillus subtilis, Lactobacillus plantarum; 28 g/steer·d-1) and YCW (Celmanax; 18 g/steer·d-1). Steers were vaccinated and poured at processing and individually weighed on d 1, 14, 42 (end of receiving phase; implanted), 77, 105 (end of growing phase), 133, 161 (implanted), 182, 230 (start ractopamine HCl) and 258. Growth performance and carcass measurements were …

Evaluation Of A Direct Fed Microbial An An Enzymatically Hydrolyzed Yeast Product Fed Alone Or In Combination To Beef Steers Administered Ractopamine Hydrochloride 28 Days Prior To Harvest During Summer Months In The Northern Plains, Erin Gubbels, Forest Francis, Thomas G. Hamilton, Jason Griffin, Warren Rusche, Tom Rehberger, Elliot Block, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Single-sourced, newly weaned steers (n=256; initial BW=542 ± 3.7lb; n=64 steers/treatment; 8 steers/pen) were blocked by location in a 2×2 factorial arrangement of DFM (Certillus CP B1801 Dry; Bacillus subtilis, Lactobacillus plantarum; 28 g/steer·d-1) and YCW (Celmanax; 18 g/steer·d-1). Temperature-humidity index (THI) was calculated as: THI=0.81×ambient temperature+[relative humidity×(ambient temperature-14.40)]+46.40. On d-1 and 2 and d-21 and 22 on RH, respiration rate (RR) and panting scores (PS) were determined before and after AM and PM feedings (0700h, 1100h, 1400h, 1700h). RR (n=3 steers/pen) was calculated from: 600/seconds required for 10 flank movements. PS utilized this scoring system: 0 (not …

Effects Of On-Arrival Application Of A Modified-Live Respiratory And Clostridia Vaccination On Health, Growth Performance, And Antibody Titers Of Newly-Weaned Calves, Erin Gubbels, Santana Hanson, Tommy Norman, Thiago Ribeiro, Thomas G. Hamilton, Forest Francis, Jason Griffin, Warren Rusche, Zachary K. F. Smith

SDSU Beef Day 2022 Summary Publication

Study Description:

Single-sourced, newly weaned steers (n=70; initial body weight (BW)=560±12.9lb) were allotted to 10 pens (n=5 pens/treatment with 7 steers/pen). Steers were blocked by BW in a randomized complete block design of VAC [vaccinated for IBR, BVD 1 and 2, PI3, and BRSV (Bovi-Shield Gold 5, Zoetis, Parsippany, NJ) and clostridial (Ultrabec 7/Somubac, Zoetis) upon arrival] or NOVAC (not vaccinated for IBR, BVD 1 and 2, PI3, and BRSV or clostridial species upon arrival). Steers were individually weighed on d 0 (arrival), 1, 21, and 42 for growth performance measures. Whole blood samples (10 mL) were collected (n=3 steers/pen …

Principles Of Holistic Resource Management: Investing In Self-Education, Pete Bauman

SDSU Beef Day 2022 Summary Publication

Study Description:

First developed as a concept for approaching grazing resources management by Alan Savory in the 1970’s as a means of combating poor grazing practices, the concept of Holistic Management has evolved in the modern era to Holistic Resource Management, or in some cases “Wholistic” Resource Management, suggesting a more inclusive approach to overall planning and assessment beyond developing a sustainable grazing plan.

In simplified terms, a complete Holistic Resource Management plan for an agricultural businesses ultimately embraces a core concept that centers on the original ‘Triple Bottom Line’ accounting philosophy where the three “P’s” of profit, people, and …

Use Of Pregnancy Associated Glycoproteins To Determine Fetal Age Throughout Gestation And Clearance Rate In Postpartum Beef Cattle, Adalaide C. Kline, Julie Walker, Taylor N. Andrews, Saulo Menegatti Zoca, Kaitlin M. Epperson, Lacey K. Quail, Jerica J.J. Rich, Jim R. Rhoades, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Previously identified pregnant females from four different herds and postpartum females from one herd were utilized. Blood samples were collected (n = 1,753; study 1) between d 28 and 285 of gestation and (heifers n = 418 and cows n = 657; study 2) once a week for up to 12 weeks after calving. Serum was tested in duplicate using a commercially available blood pregnancy test, IDEXX Alertys Pregnancy Test. In study 1, procedures were modified to allow PAG concentrations to fall within the detectible range of the assay. Data were analyzed using the MIXED procedure of SAS …

Comparison Of Lateral Flow To Other Pregnancy Determination Methods In Order To Determine Accuracy Of Pregnancy Status In Beef Cattle Pre And Postpartum, Adalaide C. Kline, Julie Walker, Taylor N. Andrews, Saulo Menegatti Zoca, Kaitlin M. Epperson, Lacey K. Quail, Jaclyn N. Ketchum, Jerica J.J. Rich, Jim R. Rhoades, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Blood samples were collected from six different Bos taurus herds between day 27 and 285 of gestation (heifers n = 1,205 and cows n = 1,539). Blood samples to determine PAG clearance interval were collected weekly postpartum for up to 12 weeks (heifers n = 418 and cows n = 657). Serum was tested using the lateral flow test and were read by two technicians who were blind to pregnancy status. Level of agreement between the tests were determined by Pearson’s correlation coefficients and Kappa scores. The MIXED procedure of SAS was used to evaluate the effect of …

Use Of Sperm In Vitro Capacitation And Flow Cytometry To Estimate Bull Fertility, Saulo Menegatti Zoca, Thomas W. Geary, Abigail L. Zezeski, Karl C. Kerns, Joseph C. Dalton, Bo R. Harstine, Matthew D. Utt, Robert A. Cushman, Julie Walker, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Frozen-thawed semen from five bulls previously identified as high (48.1% and 47.7%, bulls A and B, respectively), intermediary (45.5%, bull C) or low (43.1% and 40.7%, bulls D and E, respectively) fertility, based on pregnancy per AI, were evaluated with several laboratory measures. Measures included total motility, sperm plasma membrane integrity (viability), acrosome integrity, reactive oxygen species (ROS), mitochondrial membrane energy potential (mito-potential), zinc signatures (signatures 1 to 4), and CD9 protein populations at pre-wash, post-wash, h 0 (diluted with non-capacitation media), and at 0, 3, 6, and 24 h after dilution with capacitation media and incubation at …

Relationship Of Dag1 And Serpina5 Sperm Proteins With Bull Fertility, Saulo Menegatti Zoca, Julie Walker, Jerica J. J. Rich, Kaitlin M. Epperson, Taylor N. Andrews, Adalaide C. Kline, Jessica Nora Drum, M. Sofia Ortega, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Semen from 22 dairy bulls was used to evaluate the presence, localization, and quantification of DAG1 and SERPINA5 on sperm. Sperm motility parameters and viability was also evaluated for semen from each bull. Semen from 19 out of the 22 dairy bulls was used for in vitro embryo production (two Low-SCR and one High-SCR were not available for in vitro embryo production). Bulls were classified based on their sire conception rates (SCR) values as High-SCR (SCR > 1.0) or Low-SCR fertility (SCR < -4.0). Low fertility bulls were subdivided based on their blastocyst rate (BL) as High-BL (Low-SCR/High-BL BL ≥ 31%) or Low-BL (Low-SCR/Low-BL BL ≤ 26%), and High-SCR bulls were not subdivided. The GLM procedure in SAS was used with bull as a fixed effect to determine if variance was greater between bulls compared to within bull. Correlations were determined among DAG1 and SERPINA5 concentrations, percentage of tail labeled for SERPINA5, SCR, sperm total motility, progressive motility, and viability, and in vitro embryo produced cleavage rate (CL) and BL. The GLIMMIX procedure of SAS was used to evaluate the relationship of bull field fertility (High- and Low-SCR), and field and in vitro fertility (High-SCR, Low-SCR/High-BL, Low-SCR/Low-BL) classifications with sperm total (TMOT) and progressive (PROG) motility, viability, CL, BL, DAG1 and SERPINA5 relative concentration, and proportion of sperm tail labeled for SERPINA5. Both SERPINA5 and DAG1 were localized on the sperm head; however, SERPINA5 was also localized on the sperm tail. There was greater variance in concentration among bulls compared to within bull for both DAG1 (P < 0.01; 69.4 vs 49.1, respectively) and SERPINA5 (P < 0.01; 325.8 vs 285.4, respectively). There was a positive correlation between concentration of DAG1 and SERPINA5 (P = 0.01; r = 0.54). Concentrations of SERPINA5 were also correlated with CL (P = 0.04; r = 0.48), and percentage of sperm tail labeled for SERPINA5 was correlated with viability (P = 0.05; r = 0.44) and tended to be correlated with CL (P = 0.10; r = 0.39). There was no relationship between SCR or BL rate classifications and DAG1 (P ≥ 0.66), SERPINA5 (P ≥ 0.54), or percentage of sperm tail labeled for SERPINA5 (P ≥ 0.48).

Proteomic Analysis Of Epididymal And Ejaculated Sperm And Respective Fluids, Saulo Menegatti Zoca, Emmalee J. Northrop-Albrecht, Julie Walker, Robert A. Cushman, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Ejaculated and epididymal semen was collected from mature Angus bulls (n = 9), and then centrifuged to separate sperm and fluid. Fluids were collected and sperm pellets were resuspended in a high ionic solution and vortexed to remove loosely attached proteins. Sperm samples were centrifuged, and the supernatant was collected. Samples collected for protein analysis were snap frozen in liquid nitrogen and stored at -80 ºC. Protein analysis was performed by liquid chromatography with tandem mass spectrometry (LCMS/MS). Yearling Angus cross bulls (n = 40) were used for sperm cultures. Ejaculated (n = 20) and epididymal (n = …

Effect Of Estrous Synchronization With Natural Service Or Fixed-Timed Artificial Insemination Using Conventional Or Gender-Kkewed Semen In Beef Females On Calving Distribution And Post Weaning Calf Performance, Julie Walker, Jerica J.J. Rich, Warren Rusche, Matthew Diersen, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Within 10 herds, beef females (n = 1,620) were either: 1) not synchronized (NonSyn) and mated to bulls, 2) synchronized (7-d controlled internal drug release (CIDR)) and mated to bulls (SynNS) 3) synchronized (7-d CO-Synch plus CIDR) and artificially inseminated with conventional semen (SynAI), or 4) synchronized (7-d CO-Synch plus CIDR) and artificially inseminated with SEXED semen. Calving distributions (calves born from d 1 to 14, 1 to 21, 22 to 42, and 43 and greater) were determined by actual birthdates and calf gender was determined at birth. Over a two-year period, a subset of calves (n = …

Improving Heifer Development Programs Using Precision Technology And Ddgs, Anna Dagel, Hector Menendez Iii, Jameson R. Brennan

SDSU Beef Day 2022 Summary Publication

Study Description:

Heifers were stratified into two groups based on initial body weight and each group was randomly assigned to one of two treatments: a control group (n=30) and a precision group (n=30). Treatment groups are separated into different pastures to graze dormant native range from November to April. Groups are rotated monthly to reduce individual pasture influence. Heifers in the control group are supplemented as a group and bunk fed 5lb/head/day with dried distiller grain pellets (DDGS). Heifers within the precision group will be supplemented individually using the SmartFeed system (C-Lock Inc. Rapid City, SD) and offered 5lb/head/day DDGS …

Factors Influencing Price Of South Dakota Feeder Calves Fall 2021 And Winter 2022, Adele Harty, Olivia Amundson, Robin Salverson, Kiernan Brandt, Heather Gessner, Julie Walker, Hossein Moradi Rekabdarkolaee

SDSU Beef Day 2022 Summary Publication

Study Description:

Data was collected at Faith, Philip, Hub City (Aberdeen), Mitchell, and Ft. Pierre Livestock Auctions during the weeks of October 4, 11, 18, and November 1, 2021. Data was collected and analyzed on the approximately 116,000 head of calves that were marketed during that time frame. Data collected included: auction barn, date, seller id, sex, number of head per lot, average weight, hide color, uniformity information, vaccination data, creep feed, implants, branded programs, weaned, horns, mud score, price per hundredweight, price per head, and additional comments. Uniformity score and weighted average price per hundredweight was calculated for each …

Comparing The Impact Of Continuous And Virtually Fenced Rotational Grazing On Animal Behavior And Distribution, Logan Vandermark, Jameson Brennan, Krista Ehlert, Hector Menendez Iii

SDSU Beef Day 2022 Summary Publication

Study Description:

Six herds of yearling steers (n=127) will graze native summer pastures from May to August at the Cottonwood Field Station near Philip, South Dakota. Six pastures are divided into two groups: a continuous grazing (CG) treatment with a low, moderate, and high stocking density and a virtually fenced rotational (VFR) grazing system with the same stocking densities. VenceTM virtual fence collars were placed on all animals within the study and collected GPS data at 5-minute intervals. The CG collars are not actively managed. The VFR system is actively managed through the collars and rotated based on the amount …

Using Precision Technology To Measure Cattle Methane Emissions And Intake On Western South Dakota Rangelands, Lillian J. Mcfadden, Ken Olson, Krista Ehlert, Jameson Brennan, Amanda D. Blair, Hector Menendez Iii

SDSU Beef Day 2022 Summary Publication

Study Description:

Cattle DMI is an essential component of calculating cattle stocking rates, determining nutrient requirements, and evaluating feed efficiency. Cattle DMI and digestion of forages impact enteric greenhouse gas (GHG) emissions; a major public and environmental concern. Increased GHG levels indicate energy loss during the rumen fermentation process. Obtaining data for rangeland cattle DMI and GHG emissions is needed to understand and enhance individual animal performance and reduce negative environmental impacts. We will develop enteric emissions and DMI relationships by conducting three feeding trials using the GreenFeed and SmartFeed Pro (C-Lock Inc. Rapid City, SD). The GreenFeed will measure …

Effects Of Environmental Gradients On The Abundance And Diversity Of Helminths Across 7 Bison Herds In The Upper Midwest, Bradly Wehus-Tow, Jeff M. Martin, Jameson Brennan

SDSU Beef Day 2022 Summary Publication

Study Description:

Data were collected from Wind Cave National Park and 6 satellite bison herds across the upper Midwest ranging across South Dakota, Indiana, and Kansas with a MAP gradient ranging from 34 to 82 mm and a MAT gradient ranging from 9 to 13°C. Fecal samples were collected non-invasively from 50 freshly voided bison dung patties at each herd. Helminth eggs were recovered and identified using sugar floatation; Trichostrongyle-type eggs were hatched by coproculture to identify to species. Preliminary findings indicate that general abundance of trichostrongyle-type helminths increases by 2.3 EPG per 1°C and by 0.2 EPG per mm, …

Influence Of Beef Carcass Chilling Rate On Steak Case Life And Quality Traits, Trevor Dehaan, Lydia Hite, Erin Gubbels, Christina Elaine Bakker, Amanda D. Blair, Judson Grubbs, Keith Underwood

SDSU Beef Day 2022 Summary Publication

Study Description:

Twelve head of fed beef cattle were harvested at the SDSU Meat Laboratory over two days. Carcasses were allotted into two weight groups based on hot carcass weight (HCW): Heavyweight (HW) and Lightweight (LW). Data logging thermometers were placed in the left side of each carcass within the round, loin, rib, and chuck primals to track temperature decline. Carcass measurements including 12th rib fat thickness, ribeye area and marbling score were collected approximately 48 hours postmortem. Steaks from each primal were collected to measure Warner-Bratzler shear force (WBSF), objective and subjective color.

Serving Beef In Usda Child Nutrition Programs In South Dakota: Development Of An Faq, Anna Barr, Mikayla Hardy, Andrea Alma, Heather Hopwood, Joanna Studt

SDSU Beef Day 2022 Summary Publication

Study Description:

The project occurred in partnership with four organizations representing state, tribal, and federal affiliations. The authors collaborated to compile and answer questions. Questions that were not answered by the authors’ organizations were asked to the SD Animal Industry Board and USDA Food Safety and Inspection Service.