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Fat-tailed sheep traits as affected by docking
Faculty
Agriculture
Year:
2003
Type of Publication:
Article
Pages:
351-363
Authors:
MARAI, IFM, BAHGAT, LB
DOI:
10.1023/A:1025145422243
Journal:
TROPICAL ANIMAL HEALTH AND PRODUCTION KLUWER ACADEMIC PUBL
Volume:
35
Research Area:
Agriculture; Veterinary Sciences
ISSN
ISI:000184770800006
Keywords :
carcase traits, docking, growth, reproduction, sheep, stress, tail, wool production
Abstract:
The literature mostly indicates that docking fat-tailed lambs initially reduces growth but that post-weaning growth and feed conversion efficiency then increase. The amount of fat deposited, the total separable lean meat to fat ratio and the meat quality all increase, while the percentage of bone in the carcase either decreases or does not change in the carcases of the docked lambs. Wool growth and characteristics are, in general, not affected and reproductive traits in ewes and lambs are improved by docking. The rectal temperature, respiration rate and pulse rate are decreased following docking. The concentrations of immunoreactive beta-endorphin and cortisol in the plasma and the incidence of foot stamping and restlessness, as indicators of stress, increase after docking. Other constituents of the blood are not significantly altered following docking or by the methods of docking. Docking of fat-tailed sheep using rubber rings at one day of age can be recommended.
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