منابع مشابه
Differential transcript abundance in adipose tissue of mature beef cows during feed restriction and realimentation
Feed costs account for over 70% of the annual expenditures in cow/calf production. During the production year the cow uses nutrients to support conceptus growth, milk production, work (grazing and locomotion), and maintenance requirements. The majority of the nutrients are used to support maintenance. Substrate cycling has been identified as one of the major contributors toward energy expenditu...
متن کاملUse of ultrasound scanning and body condition score to evaluate composition traits in mature beef cows.
The experiment was designed to validate the use of ultrasound to evaluate body composition in mature beef cows. Both precision and accuracy of measurement were assessed. Cull cows (n = 87) selected for highly variable fatness were used. Two experienced ultrasound technicians scanned and assigned BCS to each cow on 2 consecutive days. Ultrasound traits were backfat thickness (UBFT), LM area (ULM...
متن کاملEstimates of Genetic Parameters for Mature Weight for Beef Cows in the Wokalup Selection Experiment
Weights of Polled Hereford and ‘Wokalup’ cows in the Wokalup selection experiment were obtained monthly, with up to 11 years of records per cow available. Mature weights were analysed treating them as repeated records per animal and by fitting a Gompertz growth curve for each animal. Estimates of heritabilities for mature weight were 0.3 to 0.4 for Herefords and 0.5 to 0.6 for Wokalups, and 0.3...
متن کاملTwinning Beef Cows
gestibility or protein quality of SBM, the urease assay is good for detecting underprocessing and the KOH protein solubility assay is good for detecting overprocessing. A combination of the latter two assays is needed to ensure that SBM has neither been underheated nor overheated. The protein dispersibility index (PDI) assay may be superior to the urease and KOH assays as an indicator of minimu...
متن کاملProductive Longevity in Beef Cows
Introduction. Cow longevity is one of the most economically important traits in the beef cow. Longevity is inter-related to other important traits, and, therefore, it is difficult to separate the importance of longevity, itself, from the importance of traits that are related to longevity. For example, reproductive performance is usually part of the culling criteria. It is often stated that repr...
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ژورنال
عنوان ژورنال: Journal of Veterinary Diagnostic Investigation
سال: 1989
ISSN: 1040-6387,1943-4936
DOI: 10.1177/104063878900100108