Beef Science Commons^™

Antral Follicular Count Is A Tool That May Allow The Selection Of More Precocious Bradford Heifers At Weaning, R. Santa Cruz, R. A. Cushman, C. Viñoles

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Although antral follicle count is a repeatable parameter across life that is positively associated with fertility, its use at weaning as a tool to discard less fertile heifers has not been extensively evaluated. The hypotheses of this work are: 1) maximum antral follicle count (MAFC) is repeatable between weaning and pre breeding evaluations, allowing selection of more fertile heifers at an early age, 2) heifers with high MAFC have growth and development parameters linked to an earlier puberty and pregnancy, 3) MAFC has a positive correlation with AMH concentrations, so that both could be used inter changeably. In this study, …

Comparing Snp Panels And Statistical Methods For Estimating Genomic Breed Composition Of Individual Animals In Ten Cattle Breeds, Jun He, Yage Guo, Jiaqi Xu, Hao Li, Anna Fuller, Richard G. Tait Jr., Xiao-Lin Wu, Stewart Bauck

Department of Child, Youth, and Family Studies: Faculty Publications

Background: SNPs are informative to estimate genomic breed composition (GBC) of individual animals, but selected SNPs for this purpose were not made available in the commercial bovine SNP chips prior to the present study. The primary objective of the present study was to select five common SNP panels for estimating GBC of individual animals initially involving 10 cattle breeds (two dairy breeds and eight beef breeds). The performance of the five common SNP panels was evaluated based on admixture model and linear regression model, respectively. Finally, the downstream implication of GBC on genomic prediction accuracies was investigated and discussed in …

Nebraska Grazing Conference Proceedings, 2018, Center For Grassland Studies, University Of Nebraska-Lincoln

Nebraska Grazing Conference Proceedings

Pasture Monitoring Sesion

Overview of Choquette Ranch by Jim Choquette

Field Applications of Pasture and Ecological Monitoring by Christine Su

Keeping Human Knowledge at the Center of Technology by Christine Su

Field Monitoring Exercise with Christine Su, Jim O’Rourke, Bethany Johnston, Brad Schick, Brent Plugge, Ben Beckman, and Jace Stott

Prescribed Fire, Bird Monitoring, and Butterfly Date by Andrew Pierson

Strategies for Rangeland Monitoring by Jim O’Rourke

Pasture Monitoring: Field Experience by Jeff Nichols, Beau Mathewson, and Mitch Stephenson

Ranch Succession Planning Session

Keeping Your Ranching Operation in the Family for Future Generations by Ron Hanson

Sharing Our Ranch Succession …

Comparison Of Retaining Replacement Heifers In A Straight-Bred Angus System Versus Purchasing Crossbred Replacement Heifers To Be Bred To A Terminal Sire, Grady D. Ruble

Electronic Theses and Dissertations

Two evaluations were conducted to evaluate the biological and economic production efficiency of retaining replacement females in a straight-bred Angus herd (HR) as opposed to purchasing crossbred replacements for a terminal sire production system (PR) where maximum maternal and individual heterosis is achieved. The first study was a comparison of the HR system versus PR system. It was modeled after a 100 hd, straightbred Angus cowherd that raises their own replacement females. The (NASEM, 2016) model was used to determine the required metabolizable energy (ME)/animal for each stage of production. Stages were broken into segments including weaning – d 28, …

Influence Of Production System On Animal Performance, Carcass Characteristics, Meat Quality, Environmental Impacts, Production Economics, And Consumer Preference For Beef, Megan Jean Webb

Electronic Theses and Dissertations

The overall objective of this study was to determine if the level of growth promotant technology used among production systems influence animal and carcass performance, meat quality, production economics, the environmental impact, and determine consumer preferences and perception. Angus � Simmental steer calves (n =120) were stratified by birth date, birth weight, and dam age in a completely randomized design and assigned to one of four treatments: 1) no antibiotics (NA, receiving no technology); 2) non-hormone treated (NHTC, fed monensin and tylosin); 3) implant (IMPL, administered a series of three implants), and 4) implant plus fed a beta-agonist (IMBA, administered …

Effects Of Enzymatically Hydrolyzed Yeast Supplementation And Supplementation Frequency On Immune Parameters, Performance, And Digestibility Among Periparturient Beef Cows And Calves, Janine Swartz

Electronic Theses and Dissertations

Effects of enzymatically hydrolyzed yeast (EHY) and supplementation frequency (FREQ) on immune parameters among beef cows and calves was evaluated. Eighty multiparous (parity = 4.2 ± 0.3) cows were fed a common brome hay-based diet (CP = 8.0 ± 0.17%). Cows were blocked by expected calving date and stratified by body condition score (BCS) before random assignment of treatment. Beginning 88 ± 5 d prior to parturition, cows were provided 1 kg daily or 3 kg every 3 d of a soybean hull-based supplement (CP = 34.0, % of DM) that contained 0 or 3 g/kg EHY. The daily supplement …

Haematology Of N’Dama And West African Shorthorn Cattle Herds Under Natural Trypanosoma Vivax Challenge In Ghana, Ebenezer Yaw Ganyo, Johnson N. Boampong, Daniel K. Masiga, Jandouwe Villinger, Paa Kobina Turkson

All Peer-Reviewed Publications

Background: Animal trypanosomosis is a major cause of economic loss in livestock production in Africa. A suggested control measure is to use breeds with traits of trypanotolerance. The study examines the effect of natural Trypanosoma vivax challenge on haematological parameters in two trypanotolerant cattle [N’Dama and West African Shorthorn (WASH)] herds. Methods: Trypanosoma vivax-specific primers were used to diagnose T. vivax infection in an N’Dama herd at Cape Coast in southern Ghana and a WASH herd at Chegbani in northern Ghana from May to July 2011 in a cross-sectional study. Levels of haematological parameters comprising packed cell volume (PCV), haemoglobin …

Essential Oils Of Indigenous Plants Protect Livestock From Infestations Of Rhipicephalus Appendiculatus And Other Tick Species In Herds Grazing In Natural Pastures In Western Kenya, Wycliffe Wanzala, Ahmed Hassanali, Wolfgang Richard Mukabana, Willem Takken

All Peer-Reviewed Publications

The effects of formulated essential oils of Tagetes minuta and Tithonia diversifolia on Rhipicephalus appendiculatus infesting livestock were evaluated in semi-field experiments. Forty-five zebu cattle naturally infested with ticks were randomly selected from 15 herds, three animals from each. Of the three animals within each herd, one was treated with 1 g of petroleum jelly (control), one with 1 g of essential oil of T. minuta and one with 1 g of essential oil of T. diversifolia on the inner side of ear pinna, the preferred feeding site of R. appendiculatus. Tick infestation on each treated host animal was monitored …

Effects Of Various Anthelmintic Treatments On Fecal Egg Counts, Performance Variables, Blood Parameters, And Lactate Dehydrogenase Activity In Stocker Calves, Cheyenne Auburn Hooks

Murray State Theses and Dissertations

Anthelmintic treatment is known to improve cattle performance; however, effects of long-acting eprinomectin (LAE) and co-treatment (Co-Trt) use has not been widely evaluated. Lactate dehydrogenase is an important cytoplasmic enzyme which can serve as an indicator of cellular damage but little information is available regarding differences in activity of calves receiving various anthelmintics. Therefore, the objective of this study was to evaluate the effects of various anthelmintic treatments on fecal egg counts (FEC), performance, blood parameters, and lactate dehydrogenase (LDH) activity of newly received stocker calves. This study consisted of 125 Angus based cross bred steers grazed during summer months …

The Three Creeks Allotment Consolidation: Changing Western Federal Grazing Paradigms, Taylor Payne

Human–Wildlife Interactions

The federal government owns approximately 47% of all land in the western United States. In the state of Utah, about 64% of the land base is managed by the federal Bureau of Land Management (BLM) and the U.S. Forest Service (USFS). The government has historically issued permits to owners of private lands to allow the owners to graze their livestock on public lands. The permits (allotments) are generally of 10-year duration and allow for an annual season of use. In some cases, continued and repeated historical annual grazing practices may not be ideal for permit holders and their communities nor …