Body Condition Score and Dairy Form as Indicators of Dairy Cattle Disease and Reproductive Performance PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages :
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Book Description
The objectives of this research were to estimate heritabilities and correlations between body condition score (BCS) from various sources, determine the genetic relationship among BCS, dairy form, cow health and reproductive performance and investigate various models to analyze BCS and dairy form. BCS was obtained from herds using PCDART dairy management software and from linear type appraisals by Holstein classifiers. Cow health data was obtained from several herds recording disease treatments. Genetic evaluations for cow health in Denmark were also obtained. Reproductive data and yield data were provided by DRMS and AIPL-USDA. Heritabilities and correlations among traits were estimated with REML using animal and sire models. Random regression and repeatability sire models were compared. Fixed effects for all models included contemporary group effects, age, and days in milk (DIM) when available. Random effects were sire or animal and error. The heritability estimate of BCS from linear type appraisal was 0.22. The genetic correlation estimate between BCS from PCDART records and linear type appraisals was 0.87, between BCS and dairy form was -0.72 and between BCS and strength was 0.69. The genetic correlation estimates from random regression models between DIM 0 in lactation 1 and DIM 305 in lactation 3 were estimated to be 0.77 for BCS and 0.60 for dairy form. Higher BCS and lower dairy form were significantly correlated with lower milk yield, less metabolic disease and fewer days open. The relationship among BCS, dairy form, cow health and reproductive disease remained significant after adjustment for milk yield. The relationship between BCS and cow health and reproductive performance tended to be non-significant after adjustment for dairy form. Supplementing direct genetic evaluations for days open with evaluations for dairy form increased reliability of days open by an average of 0.06 for 19 recently proven bulls. Selection for lower dairy form or higher BCS will slow the deterioration of cow health and reproductive performance that accompanies selection for increased yield.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The objectives of this research were to estimate heritabilities and correlations between body condition score (BCS) from various sources, determine the genetic relationship among BCS, dairy form, cow health and reproductive performance and investigate various models to analyze BCS and dairy form. BCS was obtained from herds using PCDART dairy management software and from linear type appraisals by Holstein classifiers. Cow health data was obtained from several herds recording disease treatments. Genetic evaluations for cow health in Denmark were also obtained. Reproductive data and yield data were provided by DRMS and AIPL-USDA. Heritabilities and correlations among traits were estimated with REML using animal and sire models. Random regression and repeatability sire models were compared. Fixed effects for all models included contemporary group effects, age, and days in milk (DIM) when available. Random effects were sire or animal and error. The heritability estimate of BCS from linear type appraisal was 0.22. The genetic correlation estimate between BCS from PCDART records and linear type appraisals was 0.87, between BCS and dairy form was -0.72 and between BCS and strength was 0.69. The genetic correlation estimates from random regression models between DIM 0 in lactation 1 and DIM 305 in lactation 3 were estimated to be 0.77 for BCS and 0.60 for dairy form. Higher BCS and lower dairy form were significantly correlated with lower milk yield, less metabolic disease and fewer days open. The relationship among BCS, dairy form, cow health and reproductive disease remained significant after adjustment for milk yield. The relationship between BCS and cow health and reproductive performance tended to be non-significant after adjustment for dairy form. Supplementing direct genetic evaluations for days open with evaluations for dairy form increased reliability of days open by an average of 0.06 for 19 recently proven bulls. Selection for lower dairy form or higher BCS will slow the deterioration of cow health and reproductive performance that accompanies selection for increased yield.
Author: Wissal Souissi
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0
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Book Description
Blood indicators are used as a tool to diagnose metabolic disorders. The present review aims to study the relationships between body condition score, milk yield, and reproduction and biochemical parameters in dairy cows. Live weight and body condition are indicators for dairy cow,Äôs health, milk productivity, and reproduction. Therefore, many authors investigated the effect of body condition score at calving and of change in body condition score on productive and reproductive performance, on lactation curve parameters, and on postpartum disease occurrence. Moreover, results showed that the cows calving at the highest body condition score lost more subcutaneous fat; condition score change did not exceed 1.05¬†units. Change in body condition score was positively associated with peak and total milk production. In addition, the decline in dairy reproductive performance may be due to a hampered process of metabolic adaptation. Adaptation to the negative energy balance is a gradual process. The use of risk factors is more appropriate and discussed. Among them are the body condition score and its derivatives, feed intake, the calculated negative energy balance, and metabolic parameters like the plasma concentration of insulin or the triacylglycerol content in the liver. Moreover, factors that play a role in the link between declined reproductive performance and the metabolic situation of the cow during lactating are discussed.
Author: Joseph John Domecq
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 246
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Book Description
Author:
Publisher: BoD – Books on Demand
ISBN: 1789845467
Category : Medical
Languages : en
Pages : 144
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Book Description
Greater knowledge of lactation allows us to alter environmental, nutritional, and milking procedures, or general management to maximize production. This book, focusing on lactation in farm animals (biology, physiological basis, nutritional requirements, and modelization), presents invited papers from internationally recognized scientists. This volume contains seven chapters covering the key topics related to milk production and lactation biology and physiology. The authors show that animals raised on a well-controlled nutrition regimen may have significant enhancement of succeeding lactations. Furthermore, the usefulness of a milk yield prediction system depends upon how accurately it can predict daily milking patterns and its ability to adjust to factors affecting supply. Milk yield prediction models have proven helpful for genetic analysis and for bio-economic modeling. On the whole, this book serves as an inspirational basis for both scientists and farmers.
Author: Claudia Kamphuis
Publisher: BRILL
ISBN: 9086868290
Category : Technology & Engineering
Languages : en
Pages : 459
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Book Description
The supply of new innovative precision dairy farming technologies is steadily increasing. It aims to help farmers to be more labour efficient and to support them in their daily management decisions. At the same time, since many technologies are developed from an engineering perspective, adoption of these technologies is sometimes limited since knowledge on economic benefits and farmers' needs is often incomplete. This book covers the current status of precision dairy farming technologies and what farmers expect from them. It also includes insights and future perspectives on managing, analysing, and combining sensor information. Moreover, new innovative ideas that may better fit farmers' needs and expectation are introduced, ranging from technologies or innovations that aim at improved animal health and welfare, to those technologies that result in a more efficient use of feed and improved grazing management. This book is unique because science and engineering are combined to develop precision dairy farming technologies that are to be applied in practice. The book will serve as a stepping stone for new and innovative ideas within this rapidly growing area within dairy farming.
Author: Siert-Jan Boersema
Publisher: BRILL
ISBN: 9086866948
Category : Technology & Engineering
Languages : en
Pages : 208
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Book Description
The rearing of young stock until calving is often neglected on dairy farms, compared to the management of adult cattle. It is often not realized that young stock represent a critical investment in the future of the dairy farm and that sufficient attention should be paid to the rearing period to safeguard that investment and to gain efficiency. Optimal weight gain and health during rearing are essential. The ultimate goals are that the heifer, after her first calving, enters into milk production to her fullest genetic potential and that she will have an optimal health and longevity in the herd. A population medicine approach is used to focus on healthy animals which bring profit rather than costs. Practical tools are provided to manage the complexity of young stock rearing. This approach provides the farmer with structure, planning, organisation and coaching. Risk identification and risk management, like in bio-security and in quality risk management, are key aspects of the population medicine approach. Practical examples are added to illustrate the points. Finally, a section on diseases in young stock is added as a quick reference guide. This book is a valuable reference for practising veterinarians, herd health practitioners, extension officers and other farm advisors, as well as dairy farmers.
Author: Thomas Herdt
Publisher: Elsevier Health Sciences
ISBN: 1455776173
Category : Medical
Languages : en
Pages : 283
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Book Description
A current, comprehensive issue on metabolic diseases for the food animal practitioner. Topics include obesity and insulin resistance in dairy cows, ketosis therapy, use of serum NEFA and BHBA concentrations in herd-level assessment, mineral nutrition in transition diets, protein, fat, and energy in dairy transition diets, prophylactic calcium therapy in peripartum dairy cows, metabolic regulators of feed intake, assessing and managing body condition score for the prevention of metabolic disease, and more!
Author:
Publisher: Hoard's Dairyman Books
ISBN: 9780932147271
Category : Technology & Engineering
Languages : en
Pages : 84
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Book Description
Author: B. G. Lowman
Publisher:
ISBN: 9780902164239
Category : Cattle
Languages : en
Pages : 31
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Book Description
Author: Tim J. Parkinson
Publisher: Massey University
ISBN: 9780995102958
Category : Business & Economics
Languages : en
Pages : 0
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Book Description
The definitive and authoritative text on cattle diseases in New Zealand and Australia. This extensively revised edition of what is the definitive textbook on diseases in cattle in New Zealand and Australia is written from the perspective of the veterinary practitioner encountering the diseases in cattle on a farm. The reader is provided with a detailed outline of the diagnostic methodology based on clinical examination of body systems, with confirmation by ancillary tests and responses to treatment. The principal authors and guest contributors bring a wealth of practical, academic and research experience to this text. It covers all the important diseases of cattle, with particular emphasis on clinical examination, diseases of the gastrointestinal tract, lameness, mastitis, and reproductive disorders. The chapter on practical therapeutics for the cattle veterinarian is of great value for veterinary students, and during on-farm consultations.
