Download or read book Guidelines for Choosing Replacement Females written by William T. Ahlschwede and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Peripubertal Replacement Breeding Animals in Beef Herds written by Jessica Dawn Monday and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The selection of young replacement animals can have a significant impact on beef herd reproductive performance. Replacement heifers can be utilized to improve reproductive performance by replacing mature animals that failed to meet the production with young, cycling heifers that can have the potential of improving the reproductive momentum of a herd. The use of yearling bulls in natural breeding herds has the advantage of shortening the generational interval of the herd and has the potential of reducing the cost per cow exposed as additions to the bull battery. This thesis involves two studies that investigated methods used for the selection of peripubertal replacement animals in beef herds. The first study evaluated the ability of the novel Ready-Intermediate-Problem (RIP) replacement heifer evaluation matrix to classify heifers into groups that allow producers to select for replacements that meet production goals. Beef heifers (n=341) were classified according to the RIP matrix guidelines and then exposed to AI breeding, bull breeding, or a combination of both as per the management plans for each participating herd. Following breeding season the heifers were evaluated to determine pregnancy status, pregnancy status to single AI exposure, days bred, and the number of 21 day cycles needed during breeding season to become pregnant. After breeding season, 298 (87%) of the heifers were pregnant, 204 (68%) of which became pregnant in the first 21 days of the breeding season. Probability of overall pregnancy and pregnancy after single AI exposure was not significantly associated with RIP classification. There was a significant interaction in RIP classification by 21 day cycle. The second study was a retrospective study using BSE result data to determine the proportion of yearling beef bulls that are classified as satisfactory potential breeders when reevaluated after failing their initial breeding soundness evaluation (BSE) and to identify any predictive factors at initial BSE for satisfactory performance at revaluation. The study included 2,805 beef bulls between 11 and 14 months of age at first BSE evaluated at KABSU from 2006 to 2014. Generalized linear mixed models were created to assess potential associations among breed, age, and interaction between breed and age and passing the initial evaluation and identify predictive factors for risk of passing BSE after initial failure. The majority (93%) of the study bulls passed one of up to three BSEs. There was a significant interaction between age and breed of bull at initial BSE. Identification of suitable peripubertal replacement animals that will improve herd reproductive performance remains a challenge for producers. There are several factors that can affect replacement animals' ability to perform according to expectations at the beginning of the breeding season. Classification of heifers into categories that can predict performance during breeding season with reasonable confidence can assist producers in identifying heifers that complement the reproductive performance goals of the herd. Utilizing BSE to identify bulls that have adequate semen quality as well as other traits important for breeding soundness is similarly important in reducing the risks of using young bulls for breeding.

Download or read book Choosing Replacement Females from Within the Herd written by and published by . This book was released on 1985 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bovine Reproduction written by Richard M. Hopper and published by John Wiley & Sons. This book was released on 2014-08-18 with total page 2206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.

Download or read book Genetic Improvement of Farmed Animals written by Geoff Simm and published by CABI. This book was released on 2020-11-26 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic Improvement of Farmed Animals provides a thorough grounding in the basic sciences underpinning farmed animal breeding. Relating science to practical application, it covers all the major farmed animal species: cattle, sheep, goats, poultry, pigs and aquaculture species.

Download or read book Performance as a Guide to Beef Herd Selection written by John Kamm Riggs and published by . This book was released on 1955 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beef Replacement Heifer Decision Tool written by John Sachse and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sachse Family Angus is both a commercial and registered Angus cow-calf operation in Northeast Kansas and has been in operation since 1935. The end goal in mind is to provide quality female breeding seedstock to other beef producers with the hopes of improving their herds. Successful selection and development of beef replacement heifers have major long term effects on stayability in any herd and can even have a positive impact on the whole herd. The objective of this study is to create a decision tool to determine best heifer selection strategies. Specifically, taking a look at the cost of heifer development under a range of scenarios as it applies to more traditional heifer development. The depth of literature addressing the issue of buying or raising replacement heifers is vast, providing various degrees of analysis to help a producer make the best informed decision. Some economists would argue that no single aspect of beef production management is as complicated, or has such an economic impact as cow culling and replacement heifer decisions (Melton, 1980). Procedures and methods were created to analyze whether a producer should raise or develop their own replacement heifers. One method used in creating a decision tool is an enterprise budget. Enterprise budgeting is the systematic determination and listing of expected outputs, revenues, and costs due to the production processes required to produce one unit of an enterprise for a specified time period. To take this one step further, it is assumed a producer makes choices with respect to the combinations of productive factors and products. Partial budgets include an analysis of net returns from small changes or refinement to a ranch. It focuses on parts that change while building upon an enterprise budget. In essence, it fine tunes current operations while holding all else constant. The benefits of partial budgeting take a look at what will be the new or added revenue if a change is implemented on the ranch and what costs will be reduced or eliminated if taken place. What will be the new or added costs and what revenues will be reduced if a change takes place are also things to keep in mind. Therefore, the result will show a producer the net benefit of the change. In turn, Sachse Family Angus will use this information to build their registered and commercial replacement heifers either by developing their own or purchasing from other breeders. Overtime, this decision will be critical as it will impact their herd for years to come. In conclusion, maintaining a good sound, high functioning beef cow herd means selecting and developing quality replacement heifers to retain in the herd each year. An estimated 20% of heifers born each year at Sachse Family Angus are kept as replacement heifers. When managing home raised heifers or purchased heifers, maintaining costs and keeping them in check is crucial because they represent a large up-front investment. The bottom line of this research is to give the managers at Sachse Family Angus and other operations across the country a decision tool that can be used to analyze their current resources and the resources it will take to develop their own heifers successfully and in the most cost effective way or help them analyze if purchasing their heifers makes the most financial sense.

Download or read book Guidelines for Choosing Replacement Females written by William T. Ahlschwede and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The productivity of the sow herd is the foundation of commercial pork production. The sow herd also contributes half of the genetic makeup of growing-- finishing pigs"-- Page 1.

Download or read book Factors Affecting Calf Crop written by Michael J. Fields and published by CRC Press. This book was released on 2021-11-18 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Factors Affecting Calf Crop summarizes the latest information available from leading cattle physiologists and geneticists regarding factors known to influence the production of live calves at weaning. You get practical information on management techniques for improving reproduction efficiency in the herd. You'll also learn about the functioning of the reproductive system and how this may affect reproductive processes in the cow herd. Managers will benefit from a clearer understanding of the factors known to limit efficient reproduction, while veterinarians and other professionals who advise cattlemen will appreciate the substantial reference material and color photographs for defining cow condition scores. Color photographs are also used to illustrate the discussions of testicular thermographies and their applications. Other chapters in the book cover developments in improving reproductive performance of the replacement heifer, the brood cow, and the bull. Topics on reproduction include physiology/endocrinology, the use of growth promotants, genetics and physiological and economic considerations in selecting the age to breed heifers, heritability of fertility, length of the breeding season, prepartum and postpartum nutrition, nursing by the calf, cloning of embryos, and much more.

Download or read book Selecting Commercial Herd Replacement Heifers written by J. E. Pace and published by . This book was released on 1963 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Considerations for human papillomavirus HPV vaccine product choice written by World Health Organization and published by World Health Organization. This book was released on 2024-04-17 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document summarizes current technical and programmatic information on WHO-prequalified human papillomavirus (HPV) vaccine products in order to facilitate informed country choices for HPV vaccine introduction (or product switch within immunization programmes). Since 2009, four HPV vaccine products have been prequalified by WHO. They include two bivalent products (Cecolin®, manufactured by Xiamen Innovax Co. Ltd., and CervarixTM, manufactured by GlaxoSmithKline Biologicals), one quadrivalent product (Gardasil®, manufactured by Merck Vaccines), and one nonavalent product (Gardasil-9®, manufactured by Merck Vaccines). One bivalent product (Walrinvax®) is currently under review by WHO and one quadrivalent (Cervavac®) is nationally licensed. The primary objective of this document is to provide comprehensive information on HPV vaccine products, including scientific evidence, vaccine pricing, presentations, cold chain and storage requirements and more. This information enables countries to compare different HPV vaccine products and make informed decisions regarding the inclusion of HPV vaccine in their national immunization programmes.

Download or read book Research Report from the Michigan State University Agricultural Experiment Station East Lansing written by and published by . This book was released on 1970 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Choctaw Nation Its Resources and Development Potential written by United States. Bureau of Indian Affairs. Planning Support Group and published by . This book was released on 1973 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beef Cattle Science Handbook Vol 19 written by Frank H. Baker and published by CRC Press. This book was released on 2019-08-20 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1983 International Stockinen's School Handbooks include more than 200 technical papers presented at this year's Stockmen's School-sponsored by Wlnrock International-by outstanding animal scientists, agribusiness leaders, and livestock producers expert in animal technology, animal management, and general fields relevant to animal agriculture. The Handbooks represent advanced technology in a problem-oriented form readily accessible to livestock producers, operators of family farms, managers of agri-buslnesses, scholars, and students of animal agriculture. The Beef Cattle Science Handbook, the Dairy Science Handbook, the Sheep and Goat Handbook, and the Stud Managers' Handbook each include papers on such general topics as genetics and selection; general anatomy and physiology; reproduction; behavior and animal welfare; feeds and nutrition; pastures, ranges, and forests; health, diseases, and parasites; buildings, equipment, and environment; animal management; marketing and economics (including product processing, when relevant}; farm and ranch business management and economics; computer use in animal enterprises; and production systems. The four Handbooks also contain papers specifically related to the type of animal considered

Download or read book Report United States Bureau of Indian Affairs Planning Support Group written by United States. Bureau of Indian Affairs. Planning Support Group and published by . This book was released on 1973 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Animal Science written by and published by . This book was released on 1988 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of New Genetic Technologies to Animal Breeding written by Association for the Advancement of Animal Breeding and Genetics, and published by CSIRO PUBLISHING. This book was released on 2005-09-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16th Biennial Conference of the Association for the Advancement of Animal Breeding and Genetics (AAABG) gathers together scientists, extension workers, producers and industry personnel to review developments in the application of new technologies to animal breeding. Conference presentations include 30 invited reviews and papers, and 95 contributed papers. All papers are peer-reviewed, and cover session topics that focus on genetic evaluation systems, gene expression profiling, identification and manipulation of quantitative trait loci, progress in applied programs and advanced statistical and computing techniques. Industry applications are discussed for improvement in production, health and reproduction of domestic livestock, aquaculture species and even crocodiles and ostriches. Institutions and industries in Australia, New Zealand, USA, South Africa, South-East Asia and Japan are represented with significant participation of major Cooperative Research Centres. These proceedings contain the full text of all contributed papers and summaries of the invited reviews which are published separately in the Australian Journal of Experimental Agriculture.