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Full-Text Articles in Life Sciences

Surveillance Of Ticks Parasitizing Tennessee Beef Cattle And Investigations Into The Microbial Communities Of Cattle Associated And Questing Amblyomma Maculatum, David Paul Theuret Dec 2017

Surveillance Of Ticks Parasitizing Tennessee Beef Cattle And Investigations Into The Microbial Communities Of Cattle Associated And Questing Amblyomma Maculatum, David Paul Theuret

Masters Theses

Despite the risks that ticks and tick-borne disease pose to the beef cattle industry, many Tennessee producers are unaware of the dangers they represent. This mindset could facilitate the invasion and establishment of exotic ticks and pathogens that would devastate the cattle industry. Current control practices rely on chemical methods, which are not effective long-term; therefore, investigations into creating an integrated approach to control would create more sustainable methods. This study aims to address this through two objectives: The first is to determine the species composition, seasonal prevalence, geographic distribution and diversity of ticks on Tennessee cattle. The second is ...


Evaluation Of Responses To Vaccination Of Angus Cattle For Four Viruses That Contribute To Bovine Respiratory Disease Complex, L. M. Kramer, M. S. Mayes, E. Fritz-Waters, J. L. Williams, E. D. Downey, R. G. Tait Jr., A. Woolums, C. Chase, J. M. Reecy Nov 2017

Evaluation Of Responses To Vaccination Of Angus Cattle For Four Viruses That Contribute To Bovine Respiratory Disease Complex, L. M. Kramer, M. S. Mayes, E. Fritz-Waters, J. L. Williams, E. D. Downey, R. G. Tait Jr., A. Woolums, C. Chase, J. M. Reecy

Animal Science Publications

While vaccination is an effective measure in reducing the risk of bovine respiratory disease complex (BRDC) in cattle, BRDC losses remain significant. Increasing the efficacy of vaccination depends on elucidating the protective immune response to different antigens included in vaccines, determining the best timing for vaccination and understanding the impact of the age of calf on vaccination. This study measured the serum antibodies present in calves following vaccination against four viruses commonly associated with BRDC: bovine viral diarrhea virus 1 and 2 (BVDV1 and BVDV2), bovine respiratory syncytial virus (BRSV), and bovine herpesvirus (BHV1). Serum antibody titers were measured in ...


Succession Planning And Perceived Obstacles And Attractions For Future Generations Entering Beef Cattle Production, Lee L. Schulz, Georgeanne M. Artz, Patrick J. Gunn Apr 2017

Succession Planning And Perceived Obstacles And Attractions For Future Generations Entering Beef Cattle Production, Lee L. Schulz, Georgeanne M. Artz, Patrick J. Gunn

Economics Publications

This study provides valuable insights into cow-calf producer and feedlot operator succession plans for transferring cattle operations upon exiting the industry. Across both cow-calf producers and feedlot operators, about 50% expect to be raising cattle for 10 more years or less; however, about 39% of these producers do not have a succession plan in place. Cow-calf producers view a rural lifestyle, self-employment, working with livestock, and working with family as the biggest attractions to future generations entering beef cattle production. Cow-calf producers view environmental regulations, land tax policy, and expansion of corn and soybean acres as the biggest obstacles. Feedlot ...


Economic Selection Index Development For Beefmaster Cattle I: Terminal Breeding Objective, Kathleen P. Ochsner, M. D. Macneil, Matthew L. Spangler Jan 2017

Economic Selection Index Development For Beefmaster Cattle I: Terminal Breeding Objective, Kathleen P. Ochsner, M. D. Macneil, Matthew L. Spangler

Faculty Papers and Publications in Animal Science

The objective of this study was to develop an economic selection index for Beefmaster cattle in a terminal production system where bulls are mated to mature cows with all resulting progeny harvested. National average prices from 2010 to 2014 were used to establish income and expenses for the system. Phenotypic and genetic parameter values among the selection criteria and goal traits were obtained from literature. Economic values were estimated by simulating 100,000 animals and approximating the partial derivatives of the profit function by perturbing traits one at a time, by 1 unit, while holding the other traits constant at ...


Economic Selection Index Development For Beefmaster Cattle Ii: General-Purpose Breeding Objective, Kathleen P. Ochsner, M. D. Macneil, Ronald M. Lewis, Matthew L. Spangler Jan 2017

Economic Selection Index Development For Beefmaster Cattle Ii: General-Purpose Breeding Objective, Kathleen P. Ochsner, M. D. Macneil, Ronald M. Lewis, Matthew L. Spangler

Faculty Papers and Publications in Animal Science

An economic selection index was developed for Beefmaster cattle in a general-purpose production system in which bulls are mated to a combination of heifers and mature cows, with resulting progeny retained as replacements or sold at weaning. National average prices from 2010 to 2014 were used to establish income and expenses for the system. Genetic parameters were obtained from the literature. Economic values were estimated by simulating 100,000 animals and approximating the partial derivatives of the profit function by perturbing traits 1 at a time, by 1 unit, while holding the other traits constant at their respective means. Relative ...


The Impact Of Training Strategies On The Accuracy Of Genomic Predictors In United States Red Angus Cattle, J. Lee, Stephen D. Kachman, Matthew L. Spangler Jan 2017

The Impact Of Training Strategies On The Accuracy Of Genomic Predictors In United States Red Angus Cattle, J. Lee, Stephen D. Kachman, Matthew L. Spangler

Faculty Papers and Publications in Animal Science

Genomic selection (GS) has become an integral part of genetic evaluation methodology and has been applied to all major livestock species, including beef and dairy cattle, pigs, and chickens. Significant contributions in increased accuracy of selection decisions have been clearly illustrated in dairy cattle after practical application of GS. In the majority of U.S. beef cattle breeds, similar efforts have also been made to increase the accuracy of genetic merit estimates through the inclusion of genomic information into routine genetic evaluations using a variety of methods. However, prediction accuracies can vary relative to panel density, the number of folds ...


Water Intake In Growing Beef Cattle, C. M. Ahlberg, K. Allwardt, A Broocks, K Bruno, A. Taylor, C. Krehbiel, C. Richards, S. Place, U. Desilva, D. Vanoverbeke, R. Mateescu, M. M. Rolf Jan 2017

Water Intake In Growing Beef Cattle, C. M. Ahlberg, K. Allwardt, A Broocks, K Bruno, A. Taylor, C. Krehbiel, C. Richards, S. Place, U. Desilva, D. Vanoverbeke, R. Mateescu, M. M. Rolf

Kansas Agricultural Experiment Station Research Reports

Water is an essential part of livestock and human diets and is often thought of as an inexpensive, readily available renewable natural resource. However, the amount of competition between humans, wildlife, feed production, and livestock for high-quality water is increasing, not only from the effects of drought but from the pressure of a growing global population (Nardone et al., 2010). With limited resources available for production agriculture, there is a need to identify and select for efficient animals that can produce more product with fewer inputs. Although some work has been done in dairy cattle, very little data is available ...


Producer Opinions On Antibiotic Use In The Beef Industry, T. Lee, C. D. Reinhardt, E. F. Schwandt, D. U. Thomson Jan 2017

Producer Opinions On Antibiotic Use In The Beef Industry, T. Lee, C. D. Reinhardt, E. F. Schwandt, D. U. Thomson

Kansas Agricultural Experiment Station Research Reports

Antibiotic use in the beef industry is of increasing interest to consumers and has become a point of discussion for producers, veterinarians, and professional scientists in recent years. With the vast amount of information available on the internet and social media, consumers are becoming more knowledgeable about beef production practices and the use of antibiotics in the food animal industries. Furthermore, scientists have devoted a large amount of time and money to research to investigate consumer opinions and perspectives about management practices used in food animal production. However, many of these investigations fail to include the opinions and perspectives of ...


Acknowledgments, Livestock And Meat Industry Council Inc, Biological Variability Jan 2017

Acknowledgments, Livestock And Meat Industry Council Inc, Biological Variability

Kansas Agricultural Experiment Station Research Reports

Listed below are individuals, organizations, and firms that have contributed to the beef research program through financial support, product donations, or services. We appreciate your help!


Cattlemen’S Day 2017, Full Report Jan 2017

Cattlemen’S Day 2017, Full Report

Kansas Agricultural Experiment Station Research Reports

Full Cattlemen's Day 2017 publication, including research articles on beef cattle management, nutrition, and meat science.


Evaluation Of Estrous Response Patches As A Tool To Determine Optimum Timing For Artificial Insemination And If Gonadotropin-Releasing Hormone Is Needed At Timed-Ai In Beef Cattle, Danilo Demeterco Jan 2017

Evaluation Of Estrous Response Patches As A Tool To Determine Optimum Timing For Artificial Insemination And If Gonadotropin-Releasing Hormone Is Needed At Timed-Ai In Beef Cattle, Danilo Demeterco

LSU Master's Theses

Two experiments evaluated using an estrous-detection patch to identify animals that are in standing estrus at split-timed AI (STAI) and the necessity of a gonadotropin-releasing hormone (GnRH) injection at STAI on a 7-Day CO-Synch + CIDR protocol. In experiment 1 (n=216) and in experiment 2 (n=101), multiparous lactating crossbred beef cows were stratified by age, BW, BCS, and post-partum interval to 2 treatment groups: CTRL=timed-AI (TAI) at 72h post CIDR removal, or TRT=STAI at 72 or 84h post CIDR removal. All females received GnRH plus a CIDR on d0, prostaglandin-F2α, CIDR removal, and an Estrotect estrous-detector patch ...