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Feeding and Managing the Ewe Flock: A New Watch
Document Type : Review Article
Author
Lecturer of Payam Noor University, Qom, Iran.
Abstract
The number of lambs sold per ewe mated in the breeding flock has a considerable impact on sheep operation profitability. This depends primarily on fertility, prolificacy (# of lambs), and lamb survival, mothering ability, milk production of the ewe and lamb growth rate. Optimal reproduction does vary by environment and management system – some sheep operations don’t want a lambing rate over 200%. Breed type plays an important part in the prolificacy as well as their tendency to an extended breeding season. Nevertheless, the pounds of lamb produced per ewe mated in the flock affects profitability.
Keywords
Asgari safdar, A.H., Daghigh kia , H. 2013. Calf rearing (A practical guide) Translated book, Shayeste publicarion.
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Nelson, M.L., Westberg, H.H., Parish, S.M., 2001. Effects of tallow on the energy metabolism of wethers fed barley finishing diets. J. Anim. Sci. 79, 1892–1904.
Ramana Reddy, Y., Krishna, N., Raghava Rao, E., Janardhana Reddy, T., 2003. Influence
of dietary protected lipids on intake and digestibility of straw based diets in Deccani sheep. Anim. Feed Sci. Technol. 106, 29–38.
Wolfensohn, S.; LIoyd, M., 2003: Handbook of Laboratory Animal Management and Welfare, 3rd edn. Wiley- Blackwell publishing Ltd, Garsington Road, Oxford, UK.
Beck, N.F.G., Davis, M.C.G., 1996. A comparison of ovulation rate and late embryonic mortality in ewe lambs and ewes and the role of late embryo loss in ewe lamb subfertility. Anim. Sci. 62, 79–83.
Clinquart, A., Micol, D., Brundseaux, C., Dufrasne, I., Istasse, L., 1995. Utilisation des mati`eres grasses chez les bovins `a l‘engraissement. INRA Prod. Anim. 8 (1), 29–42.
Gong, J.G., McBride, D., Bramley, T.A., Webb, R., 1994. Effects of recombinant bovine somatotrophin, insulin growth factor 1 and insulin on bovine granulosa cell steroidogenesis in vitro. J. Endocrinol. 143, 157–164.
Ivan, M.,Mir, P.S., Mir, Z., Entz, T., He, M.L., McAllister, T.A., 2004. Effects of dietary sunflower seeds on rumen protozoa and growth of lambs. Br. J. Nutr. 92, 303–310.
Machmuller, A., Ossowski, D.A., Kreuzer,M., 2000. Comparative evaluation of the effects of coconut oil, oilseeds and crystalline fat on methane release, digestion and energy balance in lambs. Anim. Feed Sci. Technol. 85, 41–60.
Moibi, J.A., Christopherson, R.J., 2001. Effect of environmental temperature and a protected lipid supplement on the fatty acid profile of ovine longissimus dorsi muscle, liver and adipose tissues. Livest. Prod. Sci. 69, 245–254.
Nelson, M.L., Westberg, H.H., Parish, S.M., 2001. Effects of tallow on the energy metabolism of wethers fed barley finishing diets. J. Anim. Sci. 79, 1892–1904.
Ramana Reddy, Y., Krishna, N., Raghava Rao, E., Janardhana Reddy, T., 2003. Influence
of dietary protected lipids on intake and digestibility of straw based diets in Deccani sheep. Anim. Feed Sci. Technol. 106, 29–38.
Wolfensohn, S.; LIoyd, M., 2003: Handbook of Laboratory Animal Management and Welfare, 3rd edn. Wiley- Blackwell publishing Ltd, Garsington Road, Oxford, UK.
Volume 2, Issue 5 - Serial Number 5
May and June 2014Pages 1336-1342
- Receive Date 30 July 2014
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