Title: Weaning Weight of Beef Calves as Affected by Age and Sex of Calf and Age of Dam
Abstract:The weaning records of 2351 purebred Hereford and Angus calves were analyzed to evaluate the influence of age of calf, sex of calf and age of dam on calf weaning weight. Age of calf at weaning was sho...The weaning records of 2351 purebred Hereford and Angus calves were analyzed to evaluate the influence of age of calf, sex of calf and age of dam on calf weaning weight. Age of calf at weaning was shown to have a highly significant influence on weaning weight. The linear regression of weight on age within ranch-year-month-of-birth subclasses was 1.20 lb. Two methods of calf age adjustment were evaluated. One method was based on individual growth rate, and the second method also considered the average growth rate of the group. The second appeared to be the most efficient. Two methods of sex adjustment were compared, an additive factor and a multiplicative factor representing the ratio of sex means. The multiplicative adjustment factor was more effective, and its use is indicated by these data. The data indicated a highly significant age-of-dam effect on calf weaning weight. Weaning weights were lowest among calves from 2-year-old cows and showed the largest change between the ages of 2 and 3 years. Maximum production was reached at 8 years of age. The adjustments obtained from this study are in reasonably close agreement with those that have been reported.Read More
Publication Year: 1965
Publication Date: 1965-11-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 36
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