Download or read book Metabolic Status and Reproductive Activity in Postpartum Dairy Cows written by Eva Zurek and published by . This book was released on 1994 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolic Status and Reproductive Activity in Postpartum Dairy Cows microform written by Eva Zurek and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1994 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Endocrine Causes of Seasonal and Lactational Anestrus in Farm Animals written by F. Ellendorff and published by Springer. This book was released on 2012-01-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolic Status at Dairy Cows with Reproductive Disorder written by Vesna Karapetkovska Hristova and published by . This book was released on 2017-03-25 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolic State and Follicular Development in the Postpartum Dairy Cow written by Marcel Frajblat and published by . This book was released on 2000 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interfaces Between Metabolic Status and the Reproductive Axis in Periparturient Dairy Cattle written by Stephen Thomas Butler and published by . This book was released on 2004 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Associations of Pre and Post partum Lying Time with Metabolic Status Health Survival and Performance of Dairy Cows written by Juan M. Piñeiro and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dairy cattle have strong behavioral need to rest and deprivation of their lying time (LT) has been associated with lameness and changes in feeding behavior and endocrinological milieu. However, the effects of LT during the transition period on metabolic stress, inflammation, health and performance have not yet been fully investigated. Therefore, the following tree specific aims were conducted. A total of 1052 Holstein cattle (401 nulliparous heifers and 651 parous cows) from 3 commercial dairy farms were enrolled for this prospective cohort study. The first aim (Chapter 3) was to evaluate the association of pre- and postpartum lying time (LT) on calcium and energy balance (NEFA and BHB), inflammation (haptoglobin and hemogram), and health status of dairy cows. Prepartum LT had significant quadratic association on serum NEFA concentration, but was not significantly associated with serum Ca concentration within 48 h after calving. Increased LT within 14 DIM was associated with increased risk of diagnosis with ketosis within 14 DIM, inflammation, and incidence of postpartum diseases. Findings from this study suggest that LT along with Ca and energy balance are critical for transition cow health. The second aim (Chapter 4) was to assess the association of post-partum LT on milk yield, components (milk fat and protein percentage), and somatic cell count (SCC). Milk yield at first DHIA test was not associated with LT within the first 14 DIM, but was negatively correlated with the daily coefficient of variation (CV) of LT within 14 DIM. However, health status was associated with milk yield and components, and health status was associated with LT within 14 DIM. The third aim (Chapter 5) was to evaluate the association of lying time (LT) within the first 14 days in milk (DIM) and health status on culling within 60 DIM, cyclicity, and reproductive performance. LT had a positive linear association with culling, for every hour increment of LT within 14 DIM the culling risk within 60 DIM increased by 1 percentage point, and negative quadratic association with cyclicity at 42 DIM. Multiparous cows with a LT of 9-13 h/d had greater probability of pregnancy up to 300 DIM compared to cows with a LT >13 h/d. These findings suggest that there is an optimum daily LT range for early postpartum cows housed in freestall barns, different than reported for mid lactation cows, with the potential for improved reproductive performance.
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.
Download or read book Metabolic Responses of Lactating Dairy Cows to Exogenous Glucagon written by Gerd Bobe and published by . This book was released on 2002 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatty liver is a major metabolic disorder of dairy cows in early lactation that compromises their health status and reproductive performance and in clinical cases decreases milk production and feed intake. Fatty liver can be treated with 14-d continuous, intravenous infusions of 10 mg/d of glucagon. The objective of the current study was to test whether treatment of fatty liver with 14-d subcutaneous injections of glucagon at 7.5 or 15 mg/d, which is more practical than infusion, would cause similar metabolic responses and improve health status and reproductive performance of dairy cows in early lactation. In the main study, multiparous Holstein cows (n=32) were grouped on the basis of their liver triacylglycerol concentration at d 8 postpartum into "Normal" (n=8; triacylglycerol 1% liver wet wt) and "Susceptible" (n=24; triacylglycerol 1% liver wet wt) cows. "Susceptible" cows were assigned randomly to three groups and beginning at d 8 postpartum received 0 (same for "Normal" cows), 2.5, or 5 mg of glucagon in 60 ml 0.15 M NaCl by subcutaneous injections every 8 h for 14 d. Subcutaneous injections of 15 mg/d of glucagon consistently increased concentrations of plasma glucose and insulin for 4 h, decreased concentrations of liver triacylglycerol in cows older than 3.5 years, and tended to decrease concentrations of plasma NEFA and BHBA. The effects of 15 mg/d of glucagon were not limited to the treatment period, because glucagon decreased the incidence of mastitis and days to first ovarian activity after the injection period. These results document that subcutaneous injections of 15 mg/d or glucagon improve metabolic status throughout the injection period and have the potential to treat fatty liver in older cows. The improved metabolic status in cows treated with 15 mg/d of glucagon in early lactation has long-term beneficial effects by improving health status and reproductive performance during the entire lactation.
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 Farm Animal Metabolism and Nutrition written by J. P. Felix D'Mello and published by CABI. This book was released on 2000 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents specially commissioned reviews of key topics in farm animal metabolism and nutrition, such as repartitioning agents, near infrared reflectance spectroscopy and digestibility and metabolisable energy assays, where major advances have recently been made or which continue to represent issues of significance for students and researchers. Authors include leading researchers from Europe, North America and Australia.
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.
Download or read book Reproduction in Farm Animals written by E. S. E. Hafez and published by John Wiley & Sons. This book was released on 2013-05-13 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you're looking for a comprehensive and reliable text on large animal reproduction, look no further! the seventh edition of this classic text is geared for the undergraduate student in Agricultural Sciences and Veterinary Medicine. In response to reader feedback, Dr. Hafez has streamlined and edited the entire text to remove all repetitious and nonessential material. That means you'll learn more in fewer pages. Plus the seventh editing is filled with features that help you grasp the concepts of reproduction in farm animals so you'll perform better on exams and in practice: condensed and simplified tables, so they're easier to consult an easy-to-scan glossary at the end of the book an expanded appendix, which includes graphic illustrations of assisted reproduction technology Plus, you'll find valuable NEW COVERAGE on all these topics: Equine Reproduction: expanded information reflecting today's knowledge Llamas (NEW CHAPTER) Micromanipulation of Gametes and In Vitro Fertilization (NEW CHAPTER!) Reach for the text that's revised with the undergraduate in mind: the seventh edition of Hafez's Reproduction in Farm Animals.
Download or read book Feeding Strategies to Improve Sustainability and Welfare in Animal Production written by Fulvia Bovera and published by MDPI. This book was released on 2021-04-23 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the scientific contributions published within the Animals topical collection “Feeding Strategies to Improve Sustainability and Welfare in Animal Production”. Originally a Special Issue, it has turned into a permanent collection, with its first article being published in July 2019 and more than 30 published articles a year later: evidence of the great interest from the scientific community regarding the topics addressed. The articles, which are grouped by species (poultry, ruminants, pigs, etc.) and by topic, deal with a wide range of arguments that, first of all, highlight the extraordinary complexity and diversity that exists in the animal production sector, and then, the great influence that nutrition and feeding can have in terms of optimizing the use of environmental resources and improving the welfare of farmed animals. In addition, all this is closely connected with the urgent need to safeguard the resources of the planet on which we live.
Download or read book Shortening Or Omitting the Dry Period in Dairy Cows written by and published by . This book was released on 2016 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Follicular Growth and Ovulation Rate in Farm Animals written by J.F. Roche and published by Springer Science & Business Media. This book was released on 1987-02-28 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypotheses regarding development of dominant follicles during a bovine estrous cycle; Inhibin and ovarian function; Development of preovulatory follicles in the cow from luteolysis until ovulation; Follicular development in heifers chronically treated with bromocryptine; ...
Download or read book Dairying written by E. Kebreab and published by . This book was released on 2004 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dairying once again finds itself at a crossroads. Increasingly, producers and scientists need to harness their knowledge and expertise to meet consumers' demands for quality milk and milk products. This volume discusses how the industry can meet the needs of today’s consumer. Scientists, producers, processors and marketeers together with those interested in the wider issues of biotechnology and the environment, present their views on six key areas of debate: cows for lifetime production; management for lifetime production; feeds and feeding; opportunities and impact; identifying the right model for accurate prediction of production; marketing – the myth against milk. The book concludes with a chapter looking at customers and consumers health.
