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Animal Sciences

South Dakota State University

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Animal Science Research Report 2024 (Complete Report), Department Of Animal Science Jun 2024

Animal Science Research Report 2024 (Complete Report), Department Of Animal Science

Animal Science Research Report 2024

This is the complete proceedings of the South Dakota State University, Department of Animal Science Research Report 2024. The report contains research on ruminant, non-ruminant, and meat science.


Influence Of Beef Carcass Weight On Rate Of Desmin Proteolysis In Four Muscles, Clay J. Carlson, Christina E. Bakker, Keith R. Underwood, Amanda D. Blair, Judson K. Grubbs May 2024

Influence Of Beef Carcass Weight On Rate Of Desmin Proteolysis In Four Muscles, Clay J. Carlson, Christina E. Bakker, Keith R. Underwood, Amanda D. Blair, Judson K. Grubbs

Animal Science Research Report 2024

No abstract provided.


Effects Of Peri-Castration Pain Management Strategies On Feed And Water Intake, Performance, And Blood Cortisol Levels Of Weaned Beef Steers, Andrea K. Brandner, Cody L. Wright, Ana Clara B. Menezes May 2024

Effects Of Peri-Castration Pain Management Strategies On Feed And Water Intake, Performance, And Blood Cortisol Levels Of Weaned Beef Steers, Andrea K. Brandner, Cody L. Wright, Ana Clara B. Menezes

Animal Science Research Report 2024

No abstract provided.


Influence Of Vegetative Diversity During The Stocker Phase On Carcass Characteristics And Economic Returns Of Beef Steers, Sydni Borders, Jameson Brennan, Christina Bakker, Keith Underwood, Kyle Grubbs, John Jaeger, Ken Olson, Amanda Blair May 2024

Influence Of Vegetative Diversity During The Stocker Phase On Carcass Characteristics And Economic Returns Of Beef Steers, Sydni Borders, Jameson Brennan, Christina Bakker, Keith Underwood, Kyle Grubbs, John Jaeger, Ken Olson, Amanda Blair

Animal Science Research Report 2024

No abstract provided.


Influence Of Finishing Systems On Carcass Characteristics, Composition, And Fatty Acid Profile Of Bison Bulls, Clay J. Newton, Lydia M. O'Sullivan, Keith R. Underwood, Judson K. Grubbs, Christina E. Bakker, Kristi M. Cammack, Thu Dinh, Carter Kruse, Amanda D. Blair May 2024

Influence Of Finishing Systems On Carcass Characteristics, Composition, And Fatty Acid Profile Of Bison Bulls, Clay J. Newton, Lydia M. O'Sullivan, Keith R. Underwood, Judson K. Grubbs, Christina E. Bakker, Kristi M. Cammack, Thu Dinh, Carter Kruse, Amanda D. Blair

Animal Science Research Report 2024

No abstract provided.


Utilization Of Camera Grading Technology For Bison Carcass Characteristics, Christina Bakker, Jessica Sparks, Keith Underwood, Kyle Grubbs, Amanda D. Blair May 2024

Utilization Of Camera Grading Technology For Bison Carcass Characteristics, Christina Bakker, Jessica Sparks, Keith Underwood, Kyle Grubbs, Amanda D. Blair

Animal Science Research Report 2024

The objective of this study was to evaluate the ability of beef camera grading technology to assess characteristics of bison carcasses.


Growing South Dakota (Spring 2024), College Of Agriculture, Food And Environmental Sciences Apr 2024

Growing South Dakota (Spring 2024), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 3Empowering the Next Generation of Agriculture
[Page] 5 Celebration of Faculty Excellence
[Page] 7 Judging Teams Provide Connection, Critical Skills
[Page] 11 Melanie Caffe: SDSU Oat Breeder Finds Motivation in Making a Difference for Farmers
[Page] 13 2024 CAFES Outstanding Seniors
[Page] 14 SDSU Celebrates Students Accepted to Veterinary Schools through Stethoscope Ceremony"
[Page] 15 New Researchers in CAFES
[Page] 17 Hitting the Mark – Shooting Sports Driving Growth in SDSU Extension 4-H Program
[Page] 19 A New Century Leads to a New Barn
[Page] 20 CAFES News & Updates
[Page] 21 Jackrabbits Now & Then
[Page] 22 What …


Preferential Binding Of Polyphenols In Blackcurrant Extracts With Milk Proteins And The Effects On The Bioaccessibility And Antioxidant Activity Of Polyphenols, Ting Mao, Fnu Akshit, Iresha Matiwalage, Subha Sasidharan, Caren Meyn Alvarez, Philip Wescombe, Maneesha S. Mohan Feb 2024

Preferential Binding Of Polyphenols In Blackcurrant Extracts With Milk Proteins And The Effects On The Bioaccessibility And Antioxidant Activity Of Polyphenols, Ting Mao, Fnu Akshit, Iresha Matiwalage, Subha Sasidharan, Caren Meyn Alvarez, Philip Wescombe, Maneesha S. Mohan

Dairy Science and Food Science Faculty Publications: 2022 to Present

Milk proteins are well-known delivery agents; however, there is no clear understanding of the competitive interactions of milk proteins with polyphenols in mixed complex systems. Here, we investigate the preferential competitive interactions of different polyphenols present in blackcurrant extract with milk proteins by quantifying the protein-bound polyphenols and comparing the factors affecting these interactions. In addition, bioaccessibility and antioxidant activity were studied after in vitro gastric digestion. Our results indicated that polyphenols from blackcurrant extracts were preferentially bound to caseins more than whey proteins, with noncovalent interactions causing secondary structural changes in the protein. The hydrophobicity and the charge of …


Valuation Of Soybean Meal Versus Distillers Co-Products As A Protein Supplement For Finishing Beef Cattle: Effects On Growth Performance, Carcass Characteristics, And Efficiency Of Dietary Net Energy Utilization, Cassidy R. Ross Jan 2024

Valuation Of Soybean Meal Versus Distillers Co-Products As A Protein Supplement For Finishing Beef Cattle: Effects On Growth Performance, Carcass Characteristics, And Efficiency Of Dietary Net Energy Utilization, Cassidy R. Ross

Electronic Theses and Dissertations

Two randomized complete block design experiments were conducted to: 1) examine the effects of soybean meal with or without additional soybean hulls in replacement of modified corn distillers grains plus (MDGS) solubles on growth performance efficiency of dietary net energy utilization and carcass traits responses in finishing beef steers, 2) determine if partial or complete replacement of dried distillers grains plus solubles (DDGS) with solvent-extracted soybean meal (SBM) in diets based upon high-moisture ensiled corn influences growth performance, efficiency of dietary net energy utilization, sera urea-N (SUN) concentrations, or carcass traits in finishing beef steers. Experiment 1 was a 118-d …


Changes In Milk Protein Functionality At Low Temperatures And Rennet Concentrations, Mahmoud E. A. Hamouda, Prafulla Salunke Jan 2024

Changes In Milk Protein Functionality At Low Temperatures And Rennet Concentrations, Mahmoud E. A. Hamouda, Prafulla Salunke

Dairy Science and Food Science Faculty Publications: 2022 to Present

This study aimed to evaluate the influence of low-concentration rennet on the chemical, rheological characteristics, and protein fractions of skim milk (SM) at 4 ± 1 °C. Skimmed milk (SM) was divided into four lots of 500 mL, and diluted rennet (1:10,000) was added at different levels at 4 ± 1 °C. The treatments included control (no rennet), T1 (0.001 mL/rennet), T2 (0.01 mL rennet), and T3 (0.1 mL rennet) treatments, which were incubated for 24 h. The sampling was performed at 0, 1, 2, 6, 12, and 24 h, and the SM after incubation time was heated to 73 …


The Effect Of Soluble Soybean Polysaccharide Addition To Permeate Concentrate On Lactose Crystallisation, Growth And Recovery During Lactose Manufacturing, Venkateswarlu Sunkesula, Prafulla Salunke, Lloyd E. Metzger Jan 2024

The Effect Of Soluble Soybean Polysaccharide Addition To Permeate Concentrate On Lactose Crystallisation, Growth And Recovery During Lactose Manufacturing, Venkateswarlu Sunkesula, Prafulla Salunke, Lloyd E. Metzger

Dairy Science and Food Science Faculty Publications: 2022 to Present

Lactose is manufactured from permeates of cheese whey, milk protein concentrate and a mix of both using a crystallisation process. Several factors, such as solute supersaturation, cooling rate and impurities, influence lactose crystallisation. This study focussed on the effect of soluble soybean polysaccharides (SSPS) on crystallisation during lactose manufacture from concentrated permeate solutions by evaluating lactose crystal growth and recovery with and without SSPS addition. Adding 0.1% (w/w) SSPS resulted in a significant difference (P > 0.05) in lactose crystal size and yield. The results suggest that using SSPS during lactose manufacturing from permeate concentrates could influence lactose crystallisation and recovery


Effects Of Dietary Rumen-Protected Choline Supplementation To Periparturient Dairy Cattle On Inflammation And Metabolism In Mammary And Liver Tissue During An Intramammary Lipopolysaccharide Challenge, Turner H. Swartz, Barry Bradford, Laman Mamedova, Kari Estes Jan 2024

Effects Of Dietary Rumen-Protected Choline Supplementation To Periparturient Dairy Cattle On Inflammation And Metabolism In Mammary And Liver Tissue During An Intramammary Lipopolysaccharide Challenge, Turner H. Swartz, Barry Bradford, Laman Mamedova, Kari Estes

Dairy Science and Food Science Faculty Publications: 2022 to Present

The objective of this experiment was to examine the effects of supplementation and dose of rumenprotected choline (RPC) on markers of inflammation and metabolism in liver and mammary tissue during an intramammary lipopolysaccharide (LPS) challenge. Parous Holstein cows were blocked by calving month and randomly assigned within block to receive 45 g/d of RPC (20.4 g/d of choline ions; CHOL45), 30 g/d of RPC (13.6 g/d of choline ions; CHOL30), or no RPC (CON) as a top-dress starting 24 d before expected calving until 21 d postpartum. Cows were alternately assigned within treatment group to either receive an intramammary LPS …


Growing South Dakota (Winter 2024), College Of Agriculture, Food And Environmental Sciences Jan 2024

Growing South Dakota (Winter 2024), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 3 Continuing a Leadership Journey
[Page] 5 CAFES Leadership Team Grows
[Page] 7 Award-Winning Faculty & Staff
[Page] 9 New Endowment Holders Recognized
[Page] 10 Inaugural Precision Livestock Field School Offered at SDSU Cottonwood Field Station
[Page] 11 SDSU Celebrates Professional Program in Veterinary Medicine Students [Page] 13 Clay Carlson, SDSU Meat Science Graduate Student Approaches School and Life with Winning Mindset
[Page] 15 SDSU Alumni has been selected as the Head Coach of the South Dakota State University Livestock Judging Team
[Page] 16 Livestock Units Promote Hands-On Learning & Premier Research
[Page] 20 SDSU leads NSF-backed fertilizer development …


Evaluation Of Dietary Fiber Technologies In Sow Diets, Garrin Shipman Jan 2024

Evaluation Of Dietary Fiber Technologies In Sow Diets, Garrin Shipman

Electronic Theses and Dissertations

Various technologies and alternative ingredients are being developed to increase the nutrient value of fibrous feedstuffs, improve animal performance, and promote sustainable swine production. Fiber-degrading enzymes have been extensively studied in growing pigs, with few studies focused on gestating sows. When considering gestating sows have greater energy digestibility of fibrous feedstuffs than grower pigs, the efficacy of fiber-degrading enzymes needs to be determined for implementation in commercial sow diets. As fiber inclusion in gestation diets benefits sow performance, corn dried distiller grains with solubles (DDGS) are a candidate fiber source for gestation alternative energy ingredient. Functional fibers, such as yeast …


Influence Of Reduced Salt In Fully Cooked Ham And Sausage Cured With Natural Celery Powder On The Growth Of Listeria Monocytogenes At 4⁰C, Anne Sherod Jan 2024

Influence Of Reduced Salt In Fully Cooked Ham And Sausage Cured With Natural Celery Powder On The Growth Of Listeria Monocytogenes At 4⁰C, Anne Sherod

Electronic Theses and Dissertations

This research evaluated the influence of reducing salt on outgrowth of L. monocytogenes on ready to eat (RTE) deli-style sliced ham cured with natural celery powder, fully cooked sausage links cured with traditional sodium nitrite and sausage links cured with natural celery powder, vacuum packaged and stored at 4⁰C on the outgrowth of L. monocytogenes. Experiment 1 evaluated L. monocytogenes outgrowth on ham over 153 days on the following treatments, current retail ham (HC) 2.0% salt; reduced salt 1 (HRS1) 1.5% salt; reduced salt 2 (HSR2) 1.35% salt; and reduced salt 2 without antimicrobials (HRS2WA) 1.35% salt without potassium lactate …


Longevity In Afrikaner Cattle: A Survival Analysis, Allison M. Bot Steffl Jan 2024

Longevity In Afrikaner Cattle: A Survival Analysis, Allison M. Bot Steffl

Electronic Theses and Dissertations

The Afrikaner breed of cattle is indigenous to South Africa and due to their hardiness was once the most popular breed amongst farmers. The objectives for this study were to: (1) estimate environmental effects (age at first calving, season) and (2) genetic variance affecting longevity in Afrikaner cattle using survival analysis and a Weibull model and (3) evaluate the effect of the Infusion Project on longevity utilizing a Cox model. For the first objective, age at first calving impacted longevity as younger age at first calving was associated with decreased longevity. Season of birth and year of birth also impacted …


Effects Of Dietary Rumen-Protected Choline Supplementation To Periparturient Dairy Cattle On Inflammation, Metabolism, And Performance During An Intramammary Lipopolysaccharide Challenge, Turner H. Swartz, Barry Bradford, Laman Mamedova, Kari Estes Dec 2023

Effects Of Dietary Rumen-Protected Choline Supplementation To Periparturient Dairy Cattle On Inflammation, Metabolism, And Performance During An Intramammary Lipopolysaccharide Challenge, Turner H. Swartz, Barry Bradford, Laman Mamedova, Kari Estes

Dairy Science and Food Science Faculty Publications: 2022 to Present

Recent studies have suggested that dietary rumen-protected choline (RPC) supplementation can modulate immune function, attenuate inflammation, and improve performance in periparturient dairy cattle; however, this has yet to be evaluated during a mastitis challenge. Therefore, the objective of this study was to examine the effects of supplementation and dose of RPC on metabolism, inflammation, and performance during an intramammary lipopolysaccharide (LPS) challenge. Parous Holstein cows (parity, mean ± SD, 1.9 ± 1.1 at enrollment) were blocked by calving month and randomly assigned within block to receive either 45 g/d of RPC (20.4 g/d of choline ions; CHOL45, n = 18), …


Incorporation Of Probiotics And Other Functional Ingredients In Dairy Fat-Rich Products: Benefits, Challenges, And Opportunities, Kritika Gaba, Sanjeev Anand Nov 2023

Incorporation Of Probiotics And Other Functional Ingredients In Dairy Fat-Rich Products: Benefits, Challenges, And Opportunities, Kritika Gaba, Sanjeev Anand

Dairy Science and Food Science Faculty Publications: 2022 to Present

This review focuses on the potential opportunities to incorporate functional ingredients like probiotics in the dairy fat-rich matrix to develop functional foods. Many dietary guidelines and the relevant literature have in general indicated many benefits of consuming milk-fat-rich products for the human body. Milk fat contains essential nutrients, including fat-soluble vitamins; short-, medium-, and long-chain with odd and branched chain fatty acids; essential amino acids; and calcium, which are all known for their bioactive properties. In addition, the incorporation of probiotics, which are known for their bioactive properties, could further enhance the products’ attributes. However, direct probiotic addition is known …


Impact Of Transglutaminase Treated Micellar Casein Concentrate And Milk Protein Concentrate On The Functionality Of Processed Cheese Product Slice Formulations, Prafulla Salunke, Lloyd E. Metzger Nov 2023

Impact Of Transglutaminase Treated Micellar Casein Concentrate And Milk Protein Concentrate On The Functionality Of Processed Cheese Product Slice Formulations, Prafulla Salunke, Lloyd E. Metzger

Dairy Science and Food Science Faculty Publications: 2022 to Present

Milk protein concentrate (MPC) is used as an ingredient in processed cheese product (PCP) formulations. However, its use can result in texture defects such as a soft body and restricted melting characteristics. The use of micellar casein concentrate (MCC), which has a higher level of casein and less serum protein, improves the texture of PCP. Further improvement in PCP products may be possible using transglutaminase (TGase), an enzyme that can crosslink proteins. This study aimed to determine the effect of TGase treatment of MPC and MCC retentates on the functionality of MPC and MCC when used in a PCP slice …


Growing South Dakota (Fall 2023), College Of Agriculture, Food And Environmental Sciences Oct 2023

Growing South Dakota (Fall 2023), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 3 Back-to-Back Champions: SDSU Quarter Scale Tractor Team Repeats International Win
[Page] 6 CAFES Welcomes New Members to College Leadership Team
[Page] 9 Vikram Mistry Retires After Nearly 40-Year Career at SDSU
[Page] 12 Bill Gibbons Retires After 36 Years at SDSU
[Page] 13 Nic Uilk: Klingbeil Endowed Educator in Precision Agriculture
[Page] 15 SDSU Students Study Abroad
[Page] 19 CAFES Faculty Claim National Awards
[Page] 21 Dairy Alum Sanne de Bruijn Grabs Global Opportunities
[Page] 23 SDSU Extension Cohort Programs
[Page] 25 Summer Field Day Highlights
[Page] 29 Jackrabbits Now and Then


Microstructural Characterization Of High-Protein Dairy Powders, Prafulla Salunke, Athira Syamala, Lloyd Metzger Aug 2023

Microstructural Characterization Of High-Protein Dairy Powders, Prafulla Salunke, Athira Syamala, Lloyd Metzger

Dairy Science and Food Science Faculty Publications: 2022 to Present

Dairy proteins are potential and multipurpose ingredients used to prepare various food products. It exhibits many beneficial functionalities and bioactivities in the processing of food products. All the functionalities of different dairy proteins depend on their peculiar structural characteristics. So, the present study aimed to characterize high-protein powders with different matrices (milk protein concentrate (MPC), rennet casein (RCN), micellar casein concentrate (MCC), whey protein isolate (WPI), and native whey concentrate (NWC)) for their composition, handling, and reconstitution properties, and microstructure and compared them with whole milk powder (WMP) and skim milk powder (SMP). The bulk density of the high-protein powders …


Growing South Dakota (Summer 2023), College Of Agriculture, Food And Environmental Sciences Jul 2023

Growing South Dakota (Summer 2023), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

3 SDSU Little International Celebrates 100 years of Tradition
7 2023 CAFES Celebration of Faculty Excellence
11 South Dakota Agricultural Experiment Station Locations and Research Initiatives
15 Every Acre Counts
16 Undergraduate Research
19 Tanner Sloan: South Dakota State Wrestler & Animal Science Student Takes Home NCAA Division I & U23 World Silver Medals
21 2023 CAFES Outstanding Seniors
23 Robert Streeter: International Advocate for Wildlife Conservation
25 Collegiate Cattlemen's Club
27 Jim and Melody Mielke: Lifelong Donors Contribute to Agriculture in More Ways than One
29 Jackrabbits Now and Then


Incorporating Metapopulation Dynamics To Inform Invasive Species Management: Evaluating Bighead And Silver Carp Control Strategies In The Illinois River, Jahn Kallis, Richard Erickson, D. P. Coulter, Alison A. Coulter, Marybeth K. Brey, Matt Catalano, John Dettmers, James Garvey, Kevin Irons, Elizabeth Marschall, Kenneth Rose, Mark Wildhaber, David Glover Jul 2023

Incorporating Metapopulation Dynamics To Inform Invasive Species Management: Evaluating Bighead And Silver Carp Control Strategies In The Illinois River, Jahn Kallis, Richard Erickson, D. P. Coulter, Alison A. Coulter, Marybeth K. Brey, Matt Catalano, John Dettmers, James Garvey, Kevin Irons, Elizabeth Marschall, Kenneth Rose, Mark Wildhaber, David Glover

Natural Resource Management Faculty Publications

1. Invasive species management can benefit from predictive models that incorporate spatially explicit demographics and dispersal to guide resource allocation decisions.
2. We used invasive bigheaded carps (Hypophthalmichthys spp.) in the Illinois River, USA as a case study to create a spatially explicit model to evaluate the allocation of future management efforts. Specifically, we compared additional harvest (e.g. near the invasion front vs. source populations) and enhanced movement deterrents to meet the management goal of reducing abundance at the invasion front.
3. We found additional harvest in lower river pools (i.e. targeting source populations) more effectively limited population sizes upriver …


Perspectives Of Dairy Employees At The Beginning Of The Covid-19 Pandemic: A Survey Of Health Risks And Educational Needs, Fernanda Ferreira, Maristela Rovai, Mireille Chahine, Mario E. De Haro-Martí, John Wenz, Joseph Dalton, Noelia Silva-Del-Rio May 2023

Perspectives Of Dairy Employees At The Beginning Of The Covid-19 Pandemic: A Survey Of Health Risks And Educational Needs, Fernanda Ferreira, Maristela Rovai, Mireille Chahine, Mario E. De Haro-Martí, John Wenz, Joseph Dalton, Noelia Silva-Del-Rio

Dairy Science and Food Science Faculty Publications: 2022 to Present

Our objective was to understand dairy employees' perceptions and educational needs at the onset of the COVID-19 pandemic. A bilingual (English and Spanish), anonymous survey targeted at dairy employees was circulated nationwide via university and allied industry media outlets. Responses (n = 63) from 11 states were received (May–Sep. 2020). Respondents worked in herds ranging from 50 to 40,000 animals in size. Dairy managers (33%) responded mostly to the English survey (52%), whereas entry-level workers (67%) chose the Spanish format (76%). Survey results highlighted different perspectives, educational needs, and preferred sources of information between English- and Spanish-speaking dairy workers. Overall, …


Dairy Digest 2023 : Live Like Someone Left The Gate Open, South Dakota State University Dairy Club Apr 2023

Dairy Digest 2023 : Live Like Someone Left The Gate Open, South Dakota State University Dairy Club

Dairy Digest

This is the 2023 Dairy Digest. The Diary Digest is published annually by the South Dakota State University Dairy Club. The Digest contains information and news about the activities and members of the SDSU Dairy Club for the academic year 2022 - 2023.


Growing South Dakota (Spring 2023), College Of Agriculture, Food And Environmental Sciences Apr 2023

Growing South Dakota (Spring 2023), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 3 Developing Climate-Smart Beef and Bison Commodities
[Page] 5 Joseph Cassady Leads CAFES as New Dean
[Page] 7 Inaugural Class of Klingbeil Scholars
[Page] 9 Jackrabbits to Future Veterinarians
[Page] 11 Protecting South Dakota’s Grasslands
[Page] 13 Growing Youth Programs
[Page] 15 Partnerships for Positive Growth
[Page] 17 Building Highly Effective Boards
[Page] 19 SDSU Extension Podcasts
[Page] 21 Providing Good Food for All
[Page] 23 Improving Seed Varieties
[Page] 25 CAFES Endowed Positions
[Page] 29 Jackrabbits Now and Then


Associations Between Preweaning Calf Feeding Behaviors With Age At First Calving And Lactational Performance Using An Automatic Calf Feeder, Turner H. Swartz, Christina Petersson-Wolfe Mar 2023

Associations Between Preweaning Calf Feeding Behaviors With Age At First Calving And Lactational Performance Using An Automatic Calf Feeder, Turner H. Swartz, Christina Petersson-Wolfe

Dairy Science and Food Science Faculty Publications: 2022 to Present

The objective of this retrospective observational study was to determine whether preweaning calf behaviors and milk replacer (MR) intake from an automatic calf feeder were associated with age at first calving and first-lactation performance. Calves were housed in groups with access to an automatic calf feeder for 7 wk with a maximum milk allowance of 1,800 g/d of MR (12 L/d). Outcomes of interest included age at first calving (n = 137), first-lactation mature-equivalent 305-d (ME305) milk yield (n = 132), and first-lactation ME305 energy-corrected milk (ECM) yield (n = 132). Linear models included the fixed effects of the daily …


Evaluation Of Growth Performance, Energy Utilization, And Carcass Trait Responses Of Finishing Lambs Administered Zeranol, Emily Nold Jan 2023

Evaluation Of Growth Performance, Energy Utilization, And Carcass Trait Responses Of Finishing Lambs Administered Zeranol, Emily Nold

Schultz-Werth Award Papers

The objective of this research was to determine the influence of implanting heavy wether lambs with 12 mg zeranol (1 pellet Ralgro, Merck Animal Health. Madison, NJ) 59 d before harvest. Average daily gain (ADG), feed efficiency, and carcass merit were evaluated. Polpypay and crossbred wethers (n = 32 total) were equally divided into two treatment groups within a randomized complete block design. Sixteen pens were used resulting in 8 replicate pens per treatment. Wethers were fed a finishing diet consisting of cracked corn, soybean meal and soybean hulls ad libitum for 59 d. Lambs had access to clean water …


Whole Genome Sequencing For Identification Of Putative Causative Alleles For Hemochromatosis In Horses, Anna M. Rauber-Ramos Jan 2023

Whole Genome Sequencing For Identification Of Putative Causative Alleles For Hemochromatosis In Horses, Anna M. Rauber-Ramos

Schultz-Werth Award Papers

Hemochromatosis is liver disorder in which excess iron is stored in the liver, leading to iron overload and extensive liver damage that can prove fatal. Based on human precedence, a genetic cause for idiopathic hemochromatosis in horses is suspected. Two horses with hemochromatosis were whole genome sequenced, with variants in candidate genes prioritized in analyses of potential pathogenicity. No clear putative variants were found to be present in both horses, suggesting an etiology more complex than the initially suspected Mendelian inheritance. A heterozygous nonsense mutation in STEAP3 metalloreductase (STEAP3) was identified as a potential contributor to hemochromatosis in one of …


Impacts Of Eastern Redcedar Juniperus Virginiana L. On Avian Communities In Eastern South Dakota, Jay Holm Jan 2023

Impacts Of Eastern Redcedar Juniperus Virginiana L. On Avian Communities In Eastern South Dakota, Jay Holm

Schultz-Werth Award Papers

Eastern redcedar (ERC) (Juniperus virginiana L.) is the most rapidly spreading woody species in the Northern Great Plains due to fire suppression, planting in windbreaks, and overgrazing. Its encroachment has converted already fragmented and/or degraded grassland into woodland, and there is concern that it may negatively impact grassland-obligate/dependent avian species. In this study, I evaluated avian community composition between ERC-encroached and non-encroached grasslands in eastern South Dakota. Six sites each of encroached grassland and non-encroached grassland were selected. Bird surveys were conducted by performing point counts placed equidistantly along a transect for two years. Presence and abundance of each species …