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Evaluating Factors Influencing Pregnancy In Beef Cows And Evaluating Factors At Weaning Influencing Ability To Pass Breeding Soundness Examination In Beef Bulls
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Book Synopsis Evaluating Factors Influencing Pregnancy in Beef Cows and Evaluating Factors at Weaning Influencing Ability to Pass Breeding Soundness Examination in Beef Bulls by : Tara Fountain
Download or read book Evaluating Factors Influencing Pregnancy in Beef Cows and Evaluating Factors at Weaning Influencing Ability to Pass Breeding Soundness Examination in Beef Bulls written by Tara Fountain and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The common thread of this research was to identify factors that improve efficiency and subsequent profitability for cow-calf producers. The objective of the literature review was to evaluate factors, such as nutrition, breed, season of birth, exposure to cycling females and hormones that influenced puberty in peri-pubertal bulls. Finding factors that influence puberty are important for both for seedstock producers and commercial cattlemen. Bulls that attain puberty earlier have a higher likelihood of passing the breeding soundness examination by the time of marketing. The objective of the first study was to determine if factors such as herd size, breeding season length, body condition of cow at mid-gestation, or the timing of breeding season affected the likelihood of pregnancy at the end of the first 21-day interval and at the end of the breeding season. Data were collected by convenience sampling from herds (n=241) consisting of 8,217 head located in the Midwest and Great Plains regions of the US from 2012 to 2017. Pregnancy diagnosis data were recorded in either 20- or 21-day intervals. A logistic regression model was used to evaluate the effect of the relevant factors (herd size category, breeding season length category, body condition score category, and timing of breeding season category) on the probability of pregnancy status at two different time-points (21-day and end of breeding season). Overall, an average 53.6% of cattle across all herds were pregnant by the end of the first 21-day interval, and an average 85.2% of cattle across all herds were pregnant by the end of the breeding season. Herds with short or medium breeding season lengths (
Book Synopsis Genetic Analysis of Maternal Ability and Evaluation of Some Environmental Factors Affecting Preweaning Performance of Beef Cattle by : Feridoun Eftekhari-Shahroudi
Download or read book Genetic Analysis of Maternal Ability and Evaluation of Some Environmental Factors Affecting Preweaning Performance of Beef Cattle written by Feridoun Eftekhari-Shahroudi and published by . This book was released on 1972 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimates of the Effects of Several Factors Influencing Birth and Weaning Traits of Beef Cattle by : John Frederick Wise
Download or read book Estimates of the Effects of Several Factors Influencing Birth and Weaning Traits of Beef Cattle written by John Frederick Wise and published by . This book was released on 1964 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Uniform Beef Improvement Programs by : Dixon D. Hubbard
Download or read book Guidelines for Uniform Beef Improvement Programs written by Dixon D. Hubbard and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Management Factors on Reproduction in Beef Cattle by : Natalie Ann Miller
Download or read book Influence of Management Factors on Reproduction in Beef Cattle written by Natalie Ann Miller and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis involves two separate studies that evaluate the effects of different beef cattle management practices on reproduction. The objective of the first study was to determine if feedlot heifers administered melengestrol acetate (MGA) and growth promoting implants could serve as viable oocyte donors for in vitro embryo production. Ovaries from heifers administered MGA and growth promotants (MGA-Implant) and ovaries from heifers not administered either substance (Control) were collected from heifers post-slaughter. Oocytes were harvested and in vitro maturation, in vitro fertilization (IVF), and in vitro culture were completed. Treatment and time interacted to affect the number of oocytes aspirated per ovary (P = 0.07) and the number of zygotes per ovary (P = 0.07). Fertilization (P = 0.90) and cleavage rates (P = 0.80) did not differ between treatments. Blastocyst rates (P = 0.30) and the number of embryos per ovary (P = 0.50) did not differ between treatments. We concluded that beef feedlot heifers fed MGA and implanted with growth promotants seem to be a viable source of oocytes for in vitro embryo production. In the second study, we hypothesized that continuous fenceline exposure of prepubertal beef bulls to cycling beef females would hasten the onset of puberty as well as increase the percentage of bulls passing their initial breeding soundness examination (BSE). Bulls were either exposed to estrous females (exposed) or were not exposed (control). Monthly scrotal circumference (SC) measurements, blood samples, semen evaluations, and bull behavior assessments were conducted. Age at puberty (P = 0.40), SC at puberty (P = 0.50), and weight at puberty (P = 0.30) did not differ between treatments. A similar (P = 0.50) percentage of bulls passed their initial BSE at 363 ± 21.5 d of age (exposed: 87.8%; control: 74.2%). Treatment, month, and stage of the estrous cycle of cows interacted to affect the number of mount attempts (P = 0.05) and the number of flehmen responses (P
Book Synopsis Factors Influencing Pregnancy Rate of Beef Cows at the West Central Florida Experiment Station by : Robert Chapman Kirst
Download or read book Factors Influencing Pregnancy Rate of Beef Cows at the West Central Florida Experiment Station written by Robert Chapman Kirst and published by . This book was released on 1964 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Influencing Pregnancy Rate in Florida Beef Cattle by : University of Florida. Agricultural Experiment Station
Download or read book Factors Influencing Pregnancy Rate in Florida Beef Cattle written by University of Florida. Agricultural Experiment Station and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reproduction in Cattle by : Peter J. H. Ball
Download or read book Reproduction in Cattle written by Peter J. H. Ball and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cattle play a fundamental role in animal agriculture throughout the world. They not only provide us with a vital food source, but they also provide us with fertilizer and fuel. Keeping reproduction levels at an optimum level is therefore essential, but this is often a complicated process, especially with modern, high yielding cows. Written in a practical and user-friendly style, this book aims to help the reader understand cattle reproduction by explaining the underlying physiology of the reproductive process and the role and importance of pharmacology and technology, and showing how management techniques can improve reproductive efficiency. This edition includes: Recent research findings on the physiology of the oestrous cycle and its control; New techniques for monitoring and manipulating reproduction, including pregnancy diagnosis and embryo transfer; Advice on identifying common infertility problems and how to prevent and treat them. Reproduction Cattle 3e is essential reading for veterinary and agricultural students, as well as veterinarians and farmers involved in cattle reproduction.
Book Synopsis Blackwell's Five-Minute Veterinary Consult by : Scott R. R. Haskell
Download or read book Blackwell's Five-Minute Veterinary Consult written by Scott R. R. Haskell and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 1045 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most trusted and well-known quick-reference resource available to veterinarians, Blackwell’s Five-Minute Veterinary Consult series includes this volume on ruminants. Hundreds of top specialists provide coverage of 420 topics arranged alphabetically from A-Z for efficient searching, with each topic indicating the species affected. An accompanying CD includes an additional 175 topics covering management, husbandry, reproduction, and diagnostics. Whether you’re a student or a practicing veterinarian, this reference book will cut down on the time spent navigating through other resources, allowing you to study, diagnose and treat more quickly.
Book Synopsis Condition Scoring of Cattle by : B. G. Lowman
Download or read book Condition Scoring of Cattle written by B. G. Lowman and published by . This book was released on 1976 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook on Experimental Economics and the Environment by : John A. List
Download or read book Handbook on Experimental Economics and the Environment written by John A. List and published by Edward Elgar Publishing. This book was released on 2013-01-01 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Until not much more than 20 years ago, economists frequently lamented the fact that they were limited in their empirical analyses to statistical assessments of market behavior, because controlled economic experiments were (thought to be) infeasible, unethical, or both. Much has changed in the intervening years! In this new volume, John List, Michael Price, and their co-authors provide a diverse set of applications of experimental approaches to the environmental economics realm. This is among the most promising of new areas of research in the economics of the environment, and this book provides a superb point of entry for experts and novices alike.' – Robert Stavins, Harvard University, US Laboratory and field experiments have grown significantly in prominence over the past decade. The experimental method provides randomization in key variables therefore permitting a deeper understanding of important economic phenomena. This path-breaking volume provides a valuable collection of experimental work within the area of environmental and resource economics and showcases how laboratory and field experiments can be used for both positive and normative purposes. The Handbook provides a timely reminder to social scientists, policymakers, international bodies, and practitioners that appropriate decision-making relies on immediate and sharp feedback, both of which are key features of proper experimentation. This book includes a collection of research that makes use of the experimental method to explore key issues within environmental and resource economics that will prove invaluable for both students and academics working in these areas.
Book Synopsis Infertility in the Male by : Larry I. Lipshultz
Download or read book Infertility in the Male written by Larry I. Lipshultz and published by Cambridge University Press. This book was released on 2009-09-24 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this canonical text on male reproductive medicine will cement the book's market-leading position. Practitioners across many specialties - including urologists, gynecologists, reproductive endocrinologists, medical endocrinologists and many in internal medicine and family practice – will see men with suboptimal fertility and reproductive problems. The book provides an excellent source of timely, well-considered information for those training in this young and rapidly evolving field. While several recent books provide targeted 'cookbooks' for those in a male reproductive laboratory, or quick reference for practising generalists, the modern, comprehensive reference providing both a background for male reproductive medicine as well as clinical practice information based on that foundation has been lacking until now. The book has been extensively revised with a particular focus on modern molecular medicine. Appropriate therapeutic interventions are highlighted throughout.
Book Synopsis Nutrient Requirements of Domesticated Ruminants by : Mike Freer
Download or read book Nutrient Requirements of Domesticated Ruminants written by Mike Freer and published by CSIRO PUBLISHING. This book was released on 2007 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This publication represents a revision of the report entitled 'Feeding standards for Australian livestock. Ruminants' that was issued in 1990 by CSIRO Publishing in conjunction with the Standing Committee on Agriculture"--Introduction.
Book Synopsis Bovine Reproduction by : Richard M. Hopper
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.
Book Synopsis Current and Future Reproductive Technologies and World Food Production by : G. Cliff Lamb
Download or read book Current and Future Reproductive Technologies and World Food Production written by G. Cliff Lamb and published by Springer Science & Business Media. This book was released on 2013-10-29 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the impacts of current and future reproductive technologies on our world food production and provides a significant contribution to the importance of research in the area of reproductive physiology that has never been compiled before. It would provide a unique opportunity to separate the impacts of how reproductive technologies have affected different species and their contributions to food production. Lastly, no publication has been compiled that demonstrates the relationship between developments in reproductive management tools and food production that may be used a reference for scientists in addressing future research areas. During the past 50 years assisted reproductive technologies have been developed and refined to increase the number and quality of offspring from genetically superior farm animal livestock species. Artificial insemination (AI), estrous synchronization and fixed-time AI, semen and embryo cryopreservation, multiple ovulation and embryo transfer (MOET), in vitro fertilization, sex determination of sperm or embryos, and nuclear transfer are technologies that are used to enhance the production efficiency of livestock species.
Book Synopsis Feed Efficiency in the Beef Industry by : Rodney A. Hill
Download or read book Feed Efficiency in the Beef Industry written by Rodney A. Hill and published by John Wiley & Sons. This book was released on 2012-09-11 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed Efficiency in the Beef Industry provides a thorough and concise overview of feed efficiency in beef cattle. It frames the great importance of feed efficiency to the industry and details the latest findings of the many scientific disciplines that intersect and aim to improve efficient and sustainable production of nutritious beef. The vast majority of production costs are directly tied to feed. With increased demand for grains to feed a rapidly increasing world population and to supply a new demand for alternative fuels, feed costs continue to increase. In recent years, the negative environmental impacts of inefficient feeding have also been realized; as such feed efficiency is an important factor in both economic viability and environmental sustainability of cattle production. Feed Efficiency in the Beef Industry covers a broad range of topics ranging from economic evaluation of feed efficiency to the physiological and genetic bases of efficient conversion of feed to high quality beef. Chapters also look at how a fuller understanding of feed efficiency is leading to new selective breeding efforts to develop more efficient cattle. With wide-ranging coverage from leading international researchers, Feed Efficiency will be a valuable resource for producers who wish to understand the complexities, challenges, and opportunities to reduce their cost of production, for students studying the topic and for researchers and professionals working in the beef industry.
Book Synopsis Manual of Intrauterine Insemination and Ovulation Induction by : Richard P. Dickey
Download or read book Manual of Intrauterine Insemination and Ovulation Induction written by Richard P. Dickey and published by Cambridge University Press. This book was released on 2009-10-08 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and practical account of how to set up and run a successful IUI and ovulation induction program.
