Models for genetic evaluations of claw health traits in Spanish dairy cattle
نویسندگان
چکیده
منابع مشابه
International Genetic Evaluations for Udder Health Traits in Dairy Cattle
Mark, T. 2005. International Genetic Evaluations for Udder Health Traits in Dairy Cattle. Doctoral dissertation. ISSN 1652-6880, ISBN 91-576-6992-9 The aim of this thesis was to investigate different approaches for international genetic evaluations of dairy sires for udder health traits. For this purpose, deregressed national genetic evaluations were used of Holstein milk somatic cell (SC) from...
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Claw trimming every four to six months has become a routine procedure for the majority of high yielding housed dairy cows. Various methods have been described, but the Dutch Five Step method (Toussaint Raven 1985) is probably the most widely used approach around the world and has been the basis for most research. Despite being the most commonly used protocol internationally, the Dutch Five Step...
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In this study, 7738 cows with production, type, and productive life traits from 239 herds with information on milk, meat, food, housing, and labour costs were used. A lifetime net profit value was calculated for each cow. An average cow had the first calf at 28.6 months of age, 6149 kg of milk in the first lactation, a productive life of 1236 days, 3.28 lactations and a net profit of 410 euros ...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2015
ISSN: 0022-0302
DOI: 10.3168/jds.2015-9562