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A note on the effect of live weight at mating on fertility of Awassi ewes in semi-arid north-west Syria

Published online by Cambridge University Press:  02 September 2010

E. F. Thomson
Affiliation:
International Center of Agricultural Research in the Dry Areas, PO Box 5466, Aleppo, Syria
F. A. Bahhady
Affiliation:
International Center of Agricultural Research in the Dry Areas, PO Box 5466, Aleppo, Syria
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Abstract

Ninety Awassi ewes managed at different levels were used to study the effect of live weight mating on fertility over 3 years in semi-arid north-west Syria. During the 56-day pre-mating period fertile ewes had higher daily live-weight gains than infertile ewes (P < 0·01), frequency of oestrous cycles increased as live weight increased (P < 0·001) and fertile ewes tended to have more frequent oestruses than infertile ewes (P > 0·05). Ewe fertility was related (r = 0·87) to live weight at mating and twinning reached a maximum (four per 100 ewes lambing) in 51· to 56-kg ewes then decreased fP > 0·05). Maximum fertility can be expected in Awassi ewes weighing over 48 kg at mating in north-west Syria.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1988

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References

REFERENCES

Bhattacharya, A. N. and Harb, M. 1973. Sheep production on natural pasture by roaming Bedouins in Lebanon. Journal of Range Management 26: 266269.CrossRefGoogle Scholar
Degen, A. A., Benjamin, R. W. and Eyal, E. 1987. A note on increasing lamb production of fat-tailed Awassi and German Mutton Merino sheep grazing in a semiarid area. Animal Production 44: 169172.Google Scholar
Epstein, H. 1985. The Awassi sheep with special reference to the improved dairy type. Animal Health and Production Paper, Food and Agriculture Organization, No. 57.Google Scholar
Fox, C., Chaaban, R., Hardison, W., Badawi, S., Choneiri, E. and Maalouf, M. 1971. Selection and breeding programs of Awassi and Chios Sheep. Magon (Lebanon), Publication No. 36.Google Scholar
Hossamo, H. E., Owen, J. B. and Farid, M. F. A. 1986. Body condition score and production in fat-tailed Awassi sheep under range conditions. Research and Development in Agriculture 3: 99104.Google Scholar
Meat and Livestock Commission. 1981. Feeding the Ewe. Sheep Improvement Services, Meat and Livestock Commission, Bletchley.Google Scholar
Thomson, E. F. and Bahhady, F. A. 1983. Flock composition and fluxes and productivity levels of Awassi flocks in the north-west Syrian steppe. Proceedings of the International Symposium on Production of Sheep and Goats in Mediterranean Areas, Ankara, pp. 278289. European Association for Animal Production, Rome.Google Scholar
Younis, A. A. 1977. Increasing ewe fertility in Arab countries. World Review of Animal Production XIII: (4), 31-36.Google Scholar
Younis, A. A., Ai-Kamali, A. A. and El-Tawil, E. A. 1978. Effect of flushing on fertility of Awassi and Hamdani ewes. World Review of Animal Production XIV: (2), 4148.Google Scholar