A Retrospective Study of American Simmental Sire Evaluations for Weight Traits PDF Download

Author: Dana Lee Palmer
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 252

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Author: Harris Benedict Wright
Publisher:
ISBN:
Category : Simmental cattle
Languages : en
Pages : 178

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Author:
Publisher:
ISBN:
Category : Livestock
Languages : en
Pages : 912

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ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 536

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Author: W. H. Shafer
Publisher: Plenum Publishing Corporation
ISBN: 9780306443480
Category : Education
Languages : en
Pages : 392

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Masters Theses Listed by Discipline: Aerospace Engineering. Agricultural Economics, Sciences and Engineering. Architechtural Engineering and Urban Planning. Astronomy. Astrophysics. Ceramic Engineering. Communications Engineering and Computer Science. Cryogenic Engineering. Electrical Engineering. Engineering Mechanics. Engineering Physics. Engineering Science. Fuels, Combustion, and Air Pollution. General and Environmental Engineering. Geochemistry and Soil Science. Geological Sciences and Geophysical Engineering. Geology and Earth Science. Geophysics. Industrial Engineering. Marine and Ocean Engineering. Materials Science and Engineering. Mechanical Engineering and Bioengineering. Metallurgy. Meteorology and Atmospheric Science. 17 additional disciplines. Index.

Author: Richard Gregory Tait
Publisher:
ISBN:
Category :
Languages : en
Pages : 228

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Selection indexes for feedlot performance have been developed by U.S. beef breed associations to help commercial producers with multiple trait selection decisions. The objective of this study was to evaluate the implications of backgrounding cattle after weaning on selection for feedlot profitability. Carcass data records for 11,011 animals and a three generation pedigree were obtained from the American Simmental Association database. Carcass traits of primary interest in this analysis were marbling score (MARB), 12th rib fat thickness (CFT), 12th rib ribeye area (CREA), and hot carcass weight (HCW). Estimated post weaning gain (EPWG) was determined using weaning weight and HCW for each individual. Post-weaning management strategies of direct placement into the feedlot (Calf-Fed) or backgrounding then placement into the feedlot (Yrlg-Fed) were evaluated. When HarvestCG and percent Simmental were included as fixed effects in multiple trait models, Calf-Fed management heritability estimates for EPWG, MARB, CFT, CREA, and HCW were 0.38, 0.38, 0.46, 0.38, and 0.45, respectively. Management as Yrlg-Fed reduced heritability estimates of EPWG, MARB, CFT, CREA, and HCW by 0.25, 0.09, 0.36, 0.10, and 0.16, respectively. Expression of EPWG, MARB, CFT, CREA, and HCW had strong positive genetic correlations under Calf-Fed and Yrlg-Fed management of 0.84, 0.95, 0.85, 0.79, and 0.61, respectively. We also investigated several potential shifts to the economic environment and how these shifts would influence sire selection decisions based on the selection index for feedlot profit under Calf-Fed management. A dynamic economic sensitivity analysis was performed. The sire index rank correlation was greater than or equal to 0.872 between any of the dynamic economic shifts. Furthermore, efficiency of selection when a dynamic economic shift occurs between selection of parents and production of progeny was greater than 0.893 across all of our dynamic economic shifts. It is very likely that the same sires would be selected for profit in feedlot performance across all of our tested economic situations. Overall, the Calf-Fed management system helped to better identify genetic differences among animals for carcass traits and selection index values based on Calf-Fed management data were very robust across a multitude of economic situations.

Author: Anthony H. Andrews
Publisher: John Wiley & Sons
ISBN: 0470752394
Category : Medical
Languages : en
Pages : 1233

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Bovine Medicine provides practical and comprehensive information oncattle disease and production and is a key reference for all largeanimal vets. Since the first edition was published in 1991 therehave been significant improvements in disease control andmanagement of cattle. Almost all parts of the book have beenupdated and completely rewritten. There are new chapters onsurgery, embryo transfer, artificial insemination, ethno-veterinarymedicine and biosecurity, and a new consolidating chapter on theinteraction between the animal, environment, management anddisease. The previous edition has sold all over the world, and as aresult of this a greater emphasis has been placed on conditions andtheir treatment in areas other than temperate regions. A newsection entitled "Global Variation in Cattle Practice" has beenincluded with contributors discussing bovine medicine practice intheir part of the world. All in all this is an outstanding resource for any practisingvet and an excellent reference for veterinary students.

Author: Hasan Khatib
Publisher: John Wiley & Sons
ISBN: 1118677404
Category : Science
Languages : en
Pages : 336

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Book Description
Animal genetics is a foundational discipline in the fields of animal science, animal breeding, and veterinary sciences. While genetics underpins the healthy development and breeding of all living organisms, this is especially true in domestic animals, specifically with respect to breeding for key traits. Molecular and Quantitative Animal Genetics is a new textbook that takes an innovative approach, looking at both quantitative and molecular breeding approaches. The bookprovides a comprehensive introduction to genetic principles and their applications in animal breeding. This text provides a useful overview for those new to the field of animal genetics and breeding, covering a diverse array of topics ranging from population and quantitative genetics to epigenetics and biotechnology. Molecular and Quantitative Animal Genetics will be an important and invaluable educational resource for undergraduate and graduate students and animal agriculture professionals. Divided into six sections pairing fundamental principles with useful applications, the book's comprehensive coverage will make it an ideal fit for students studying animal breeding and genetics at any level.

Author: Robert S. Youngquist
Publisher: Elsevier Health Sciences
ISBN: 1437713408
Category : Medical
Languages : en
Pages : 1088

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Book Description
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.

Author: Paul R. Greenough
Publisher: Elsevier Health Sciences
ISBN: 0702027804
Category : Medical
Languages : en
Pages : 324

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Book Description
This title is directed primarily towards health care professionals outside of the United States. Laminitis and lameness are the most significant diseases afflicting cattle. BOVINE LAMINITIS AND LAMENESS: A HANDS ON APPROACH PROVIDES veterinarians, researchers and cattle producers with an invaluable and handy resource for managing these problems. With a focus on investigation and control of lameness at the herd level, this book offers guidance on containing situations before they become severe problems within the herd. Based on the most recent research, it also explains how animal behaviour and inadequate production management play important roles in increasing prevalence of lameness and other metabolic diseases. Written specifically for people who work with cattle, the book addresses the problem of lameness to help them advise on incidents of herd lameness Includes detailed information on the anatomy of the foot as well as the pathology of the region and all conditions affecting the feet of cattle Features research on the recent advances in livestock production technologies that have implications for causing lameness Over 450 colour images are used to illustrate many disease-producing lesions and add clarity to many other topics Accessible content with concise and comprehensive descriptions makes finding important information easy Colour coded boxes in each chapter highlight vital information in 3 areas: Key Concepts, Technical Comments, and Glossary terms