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Hay Quality Breed And Ovarian Development Effects On Onset Of Puberty And Reproductive Performance Of Beef Heifers
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Book Synopsis Hay Quality, Breed, and Ovarian Development Effects on Onset of Puberty and Reproductive Performance of Beef Heifers by : Randy Charles Perry
Download or read book Hay Quality, Breed, and Ovarian Development Effects on Onset of Puberty and Reproductive Performance of Beef Heifers written by Randy Charles Perry and published by . This book was released on 1989 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 2021-04-30 with total page 1232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction A complete resource for practical, authoritative information on all aspects of bovine theriogenology The newly revised Second Edition of Bovine Reproduction delivers a comprehensive overview of all major issues in bovine reproduction. Written by leading experts in the subject, the book is an indispensable reference for any veterinarian dealing with bovine fertility. Bovine Reproduction is divided into sections on the bull, the cow, the neonate, and assisted reproduction techniques. New chapters cover new gene manipulation technologies, managing problem donors, lameness, and more. Outdated and redundant information from the First Edition has been removed and replaced by coverage of new diseases, technologies, procedures, techniques, and approaches to fertility problems. A new companion website provides images and tables from the book in PowerPoint format. In addition to more than 675 full-color images, readers will also benefit from: A thorough discussion of the anatomy and physiology of the bull, including the endocrine and exocrine function of bovine testes and the thermoregulation of the testes An exploration of breeding and health management of bulls, including the evaluation of breeding soundness and ultrasound examination of the reproductive tract An examination of the anatomy, physiology, and the breeding and health management of cows, including fetal programming, the reproductive tract microbiome, and a section on obstetrics and reproductive surgery A review of the management of both critical care of the neonate and effective colostrum assessment and provision An introduction to assisted and advanced reproductive technologies A practical and comprehensive reference, Bovine Reproduction is a must-have purchase for bovine practitioners, theriogenologists, animal scientists, veterinary students, and residents with an interest in cattle.
Book Synopsis Current Therapy in Large Animal Theriogenology - E-Book by : Robert S. Youngquist
Download or read book Current Therapy in Large Animal Theriogenology - E-Book written by Robert S. Youngquist and published by Elsevier Health Sciences. This book was released on 2006-11-23 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential resource for both students and practitioners, this comprehensive text provides practical, up-to-date information about normal reproduction and reproductive disorders in horses, cattle, small ruminants, swine, llamas, and other livestock. Featuring contributions from experts in the field, each section is devoted to a different large animal species and begins with a review of the clinically relevant aspects of the reproductive anatomy and physiology of both males and females. Key topics include the evaluation of breeding soundness, pregnancy diagnosis, diagnosis and treatment of infertility, abortion, obstetrics, surgery of the reproductive tract, care of neonates, and the latest reproductive technology. Includes coverage of all large animal species. All sections provide a review of clinically pertinent reproductive physiology and anatomy of males and females of each species. Complete coverage of the most current reproductive technology, including embryo transfer, estrous synchronization, and artificial insemination. A new section on alternative farming that addresses reproduction in bison, elk, and deer. New to the equine section: stallion management, infertility, and breeding soundness evaluation. New to the bovine section: estrous cycle synchronization, reproductive biotechnology, ultrasonographic determination of fetal gender, heifer development, and diagnosis of abortion. New to the porcine section: artificial insemination, boar/stud management, diseases of postpartum period, and infectious disease control. New to the llama section: infectious disease and nutrition.
Book Synopsis Beef Heifer Development, An Issue of Veterinary Clinics: Food Animal Practice by : David J Patterson
Download or read book Beef Heifer Development, An Issue of Veterinary Clinics: Food Animal Practice written by David J Patterson and published by Elsevier Health Sciences. This book was released on 2013-12-28 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest information on heifer development in beef cattle for the food animal practitioner! Topics include rebuilding the US cowherd, physiology and endocrinology of puberty, nutritional development and the target weight debate, long-term reproductive health, effect of prenatal programming on development, economics of development, synchronization of estrus and ovulation, post breeding heifer management, management strategies for adding value to heifers, and more!
Book Synopsis Effects of Pubertal Status and Number of Estrous Cycles Prior to Breeding in Beef Heifers, Average Daily Gain on Reproductive Performance and Comparison of Two Fixed Time AI Estrus Synchronization Protocols by : Rebecca A. Vraspir
Download or read book Effects of Pubertal Status and Number of Estrous Cycles Prior to Breeding in Beef Heifers, Average Daily Gain on Reproductive Performance and Comparison of Two Fixed Time AI Estrus Synchronization Protocols written by Rebecca A. Vraspir and published by . This book was released on 2014 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproductive success is the most important factor in beef cattle production and is affected by timing of pubertal onset in heifers, and reproductive biotechnologies utilized. Three studies were conducted to evaluate the effects of pubertal status, ADG, and 2 fixed time AI protocols on reproductive success in beef heifers. In the first study, heifers that were pubertal prior to breeding had a greater AI and overall pregnancy rate; produced more calves born within the first 21 d of the calving season; and weaned older, heavier calves than non-pubertal heifers. Additionally, heifers that had ≥2 estrous cycles, prior to the first breeding season, had a greater second season pregnancy rate than those heifers that had 0 or 1 estrous cycles prior to the first breeding season. In the second study, as ADG increased leading up to breeding the odds of attaining puberty increased for Gudmundsen Sandhills Laboratory heifers. For West Central Research and Extension Center heifers, as ADG increased the odds of puberty attainment decreased. Odds of pregnancy were affected by BW gain and pubertal status interaction; however, pubertal status had the greatest influence on increasing the odds of pregnancy. In the third study, 2 progestin-based fixed time AI protocols, MGA and 14-d CIDR, were compared to evaluate pregnancy rates. Fixed time AI pregnancy rate and final pregnancy rate was similar between MGA and 14-d CIDR. An economic analysis suggested synchronizing heifers with MGA was a more cost-effective treatment.
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Book Synopsis Current Veterinary Therapy by : David E. Anderson
Download or read book Current Veterinary Therapy written by David E. Anderson and published by Elsevier Health Sciences. This book was released on 2008-11-20 with total page 737 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading food animal researchers, practitioners, and educators, this comprehensive guide provides quick access to the latest medical and surgical interventions for cattle, sheep, and goats. The concise, quick-reference format and logical body systems organization make it ideal for use in both the clinical setting and the field. You'll easily locate key information on preventing, treating, and managing disease in food animals, as well as expert insights on improving outcomes for individual animals and herd populations. - Authoritative, cutting-edge coverage offers clinically relevant strategies for diagnosing and managing a wide range of diseases and disorders in food animals, with a focus on cattle, sheep, and goats. - Logically organized content is easy-to-follow and provides a practical approach to determining appropriate medical and surgical interventions. - Concise, easy-to-read format helps you find essential information quickly and easily. - Expert editors, consultants, and writers ensure the accuracy, relevance, and timeliness of each topic to keep you on the cutting edge of food animal therapy. - New editors and a new team of section editors bring a fresh perspective and authoritative guidance on caring for food animals. - Completely revised and updated content includes new sections on topics such as: - Genital surgery - Pharmacology and therapeutics - Restraint, anesthesia, and pain management - Cow-calf/small ruminant production medicine - Feedlot production medicine - Coverage of hot topics in the field includes biosecurity in feedlots, therapy in organic livestock medicine, and ethical responsibilities in selecting drugs for use in food animals. - Expanded treatment options incorporate surgical interventions where appropriate, including laparoscopic procedures.
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 Evaluation of the Effects of Heifer Development Method on Subsequent Reproductive Performance and Progeny Growth by : Amanda Jillian Cain
Download or read book Evaluation of the Effects of Heifer Development Method on Subsequent Reproductive Performance and Progeny Growth written by Amanda Jillian Cain and published by . This book was released on 2016 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the present study was to evaluate the effects of low input development protocols on Southeastern replacement beef females and their offspring. Fall and spring calving crossbred beef heifers managed through one of two heifer development programs (low input, LOW or conventionally developed, CON) were evaluated for metrics of uterine artery hemodynamics, patterns of heifer and offspring growth, postpartum reproductive performance, and economic efficiency. There were significant treatment × season (P = 0.0001) and season × day (P = 0.003) interactions on heifer body weight (BW) during gestation. There was a season × day interaction on total blood flow (TBF; P = 0.05) whereby TBF increased as gestation progressed and spring calving heifers displayed increased TBF. When adjusted for BW, an additional main effect of treatment was observed (P = 0.0007) in which LOW heifers had increased TBF compared to CON heifers. There were no significant main effects of treatment or season or interactions thereof on the proportion of females cycling at the start of the breeding season (P > 0.05). Additionally, there were main effects of treatment (P = 0.0095; P = 0.02) and season (P = 0.012; P = 0.007) on calf ADG and weaning weights, respectively whereby calves born to CON females grew faster than calves born to LOW heifers, and SPRING calves gained more rapidly than FALL calves. Partial budgeting demonstrated that LOW bred heifers were $250/hd less expensive to purchase than CON heifers due to lighter BW. Calves born to LOW females yielded $6.38 less per calf compared to CON calves. The discrepancy in reproductive efficiency coupled with the failure of LOW females to achieve BW similar to CON females resulted in a difference of $403/hd in average cull value between LOW and CON females in which CON females were worth more. Thus, CON females were $159.18 more profitable than LOW females when purchased as bred heifers and sold at the weaning of their first calf. In conclusion, though uterine artery BF was not negatively affected, low input heifer development resulted in sub-optimal heifer growth, poor first calf performance, and inadequate reproductive efficiency.
Book Synopsis Journal of Production Agriculture by :
Download or read book Journal of Production Agriculture written by and published by . This book was released on 1991 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Production-oriented information for professional agriculturists.
Book Synopsis Effects of Post-weaning Development Regimen on Reproductive Performance of Beef Heifers from First to Second Pregnancy by : Jay D. Olsen
Download or read book Effects of Post-weaning Development Regimen on Reproductive Performance of Beef Heifers from First to Second Pregnancy written by Jay D. Olsen and published by . This book was released on 1992 with total page 0 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
Download or read book Veterinary Medicine written by and published by . This book was released on 1997 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ovarian and Endocrine Dynamics Associated with Sexual Maturation in Beef Heifers and the Influence of Diet, Weaning Age, and Other Factors During Early Reproductive Development by : Chad Lamar Gasser
Download or read book Ovarian and Endocrine Dynamics Associated with Sexual Maturation in Beef Heifers and the Influence of Diet, Weaning Age, and Other Factors During Early Reproductive Development written by Chad Lamar Gasser and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A series of experiments was designed to test the ability to induce precocious puberty in heifers and to determine the underlying mechanisms responsible for the precocious attainment of puberty. A model consisting of early weaning (3-4 months of age) and feeding a high-concentrate diet was used for each experiment. This method resulted in increased body weight gain. Additionally, precocious puberty was induced in a vast majority of heifers; and consequently, mean age at puberty was substantially reduced. Heifers that achieved precocious puberty did so at lesser body weights. In addition, subsequent estrous cycles continued after precocious attainment of puberty. In the first experiment, heifers that were weaned early and fed the high-concentrate diet exhibited a greater frequency of LH pulses leading to precocious attainment of puberty. In the second experiment, ovarian maturation was accelerated during the same period leading up to puberty. This was evidenced by increased maximum diameter of dominant ovarian follicles, increased duration of waves of ovarian follicular development, and increased peak estradiol concentrations during follicle waves. In the third experiment, estradiol-implanted, ovariectomized heifers that were weaned early and fed the high-concentrate diet escaped from estradiol negative feedback on LH secretion at a younger age, which was similar to the age at which ovary-intact heifers on the same diet attained puberty. It was concluded from these results that advancement of the decline in estradiol negative feedback on secretion of LH is the mechanism by which early weaning and feeding a high-concentrate diet induces precocious puberty in heifers. Essentially, the peripubertal period of development in heifers was shifted to a younger age with this model. A fourth experiment was conducted to determine the relative effects of timing of feeding the high-concentrate diet on age at puberty in early-weaned heifers. It was discovered that feeding the high-concentrate diet only for a period of 10 weeks after early weaning successfully advanced puberty to an extent similar to that of continuous feeding of the high-concentrate diet after early weaning. These experiments provide evidence that nutritional control during the early maturational period in heifers exerts substantial influence on timing of puberty.
Book Synopsis Factors Affecting Calf Crop by : Michael J. Fields
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.
Book Synopsis Agricultural Research in Kansas by : Kansas Agricultural Experiment Station
Download or read book Agricultural Research in Kansas written by Kansas Agricultural Experiment Station and published by . This book was released on 1986 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A History of the Agricultural Research Center-Hays by : William Phillips (M.)
Download or read book A History of the Agricultural Research Center-Hays written by William Phillips (M.) and published by . This book was released on 2001 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
