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    Effects of sex and age on behaviour and performance in beef calves after abrupt weaning

    Date
    2015
    Author
    Lambertz, C
    Farke-Röver, A
    Gauly, M
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    Abstract
    The effects of weaning on beef calves of different ages were investigated. Forty male and 40 female calves were either weaned at 6 (W6, n=40) or 8 (W8, n=40) months of age. The vocalization activity and behaviors (feeding, lying and standing/walking) were observed during the first 3 days following weaning. Body weight was recorded at 6 and 8 months and 2 weeks following weaning. W6 animals vocalized more often than W8 calves and females more than males on day 1 (P<0.05). The vocalization activity decreased at a higher rate in W8 than in W6 from days 1 to 3. On day 2, W6 calves spent less time lying and more standing/walking than W8 calves (P<0.05). The behaviors did not differ between males and females. The average daily gain after weaning did not differ between weaning ages (P>0.05), but W8 calves gained more from 6 to 8 months of age. In conclusion, weaning distress was more pronounced in W6 than in W8 calves. W8 calves also had a superior growth performance during 6 to 8 months of age. The effect of the calves' sex was less pronounced. Therefore, it is recommended to wean beef calves later than 6 months of age
    URI
    http://dx.doi.org/10.1111/asj.12285
    http://onlinelibrary.wiley.com/doi/10.1111/asj.12285/abstract
    http://hdl.handle.net/10863/2472
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