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A note on increasing lamb production of fat-tailed Awassi and German Mutton Merino sheep grazing in a semi-arid area

Published online by Cambridge University Press:  02 September 2010

A. A. Degen
Affiliation:
Isan Center, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
R. W. Benjamin
Affiliation:
Agricultural Research Organization, Gilat Experimental Station, Negev Mobile Post 2, Israel
E. Eyal
Affiliation:
Agricultural Research Organization, Bet Dagan, Israel
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Extract

The native fat-tailed Awassi and the imported German Mutton Merino (GMM) sheep are well adapted to semi-arid conditions (Degen, 1977; Degen and Shkolnik, 1978). This enables these sheep to graze large areas of the Negev Desert in Israel that is marginal for farming. However, under extensive conditions both these sheep breeds yield low lamb crops producing fewer than 1·0 lamb per ewe per year.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1987

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References

REFERENCES

Boaz, T. G. and Tempest, W. M. 1975. Some consequences of high flock prolificacy in an intensive grassland sheep production system. Animal Production 20: 219232.Google Scholar
Burfening, P. J. and Van HORN, J., L. 1970. Induction of fertile oestrus in prepubertal ewes during the anoestrous season. Journal of Reproduction and Fertility 23: 147150.CrossRefGoogle ScholarPubMed
da Silva Portugal, J. and Cabral Calheiros, F. 1968. The Black Portegese Merino. Synthesis of a new breed. Boletim Pecuário 36: 127138.Google Scholar
Degen, A. A. 1977. Responses to dehydration in a native fat-tailed Awassi and imported German Mutton Merino sheep. Physiological Zoology 50: 284293.Google Scholar
Degen, A. A. and Shkolnik, A. 1978. Thermoregulation in fat-tailed Awassi, a desert sheep, and in German Mutton Merino, a mesic sheep. Physiolgical Zoology 51: 333339.CrossRefGoogle Scholar
Gordon, I. 1958. The use of progesterone and serum gonadotrophin (PMS) in the control of fertility in sheep. I. The hormonal augmentation of fertility in the ewe during the breeding season. Journal of Agricultural Science, Cambridge 50: 123151.CrossRefGoogle Scholar
Labban, F. H. and Radwan, A. 1969. A study of some economic characters of an imported Merino flock. Journal of Animal Production of United Arab Republic 9: 303304.Google Scholar
Land, R. B. and McClelland, T. H. 1971. The performance of Finn-Dorset sheep allowed to mate four times in two years. Animal Production 13: 637641.Google Scholar
Leman, A. D., Dziuk, P. J. and Doane, B. B. 1970. Synchronization of estrus and shortening of the interval between lambings by induction of estrus and of ovulation during anestrus. Journal of the American Veterinary Medical Association 157: 15741576.Google ScholarPubMed
Morag, M., Degen, A. A. and Popliker, F. 1973. The reproductive performance of German Mutton Merino ewes in a hot arid climate. Zeitschrift für Tierzuchtung und Züchtungsbiolgie 89: 340345.CrossRefGoogle Scholar
Morag, M. and Eyal, E. 1971. Post partum conception ni lactating Awassi and East Friesian × Awassi dairy ewes. Journal of Agricultural Science, Cambridge 11: 109116.CrossRefGoogle Scholar
Newton, J. E. and Betts, J. E. 1968. Factors affecting litter size in the Scotch Half-bred ewe. II. Superovulation and the synchronization of oestrus. Journal of Reproduction and Fertility 17: 485493.CrossRefGoogle ScholarPubMed
Newton, J. E., Betts, J. E. and Large, R. V. 1970. Increasing litter size in three breeds of sheep by superovulation. Journal of Agricultural Science, Cambridge 75: 355360.CrossRefGoogle Scholar
PÁLSSON, H. 1962. Augmentation of fertility in Iceland ewes with pregnant-mare serum in successive years. Journal of Reproduction and Fertility 3: 5563.CrossRefGoogle ScholarPubMed
Robinson, J. J., Fraser, C., Corse, E. L. and Gill, J. C. 1971. Reproductive performance and protein utilization in pregnancy of sheep conceiving at eight months of age. Animal Production 13: 653660.Google Scholar
Rottensten, K. and Ampy, F. 1971. Studies on Awassi sheep in Lebanon. II. Reproduction of a flock bred at four month intervals. Journal of Agricultural Science, Cambridge 11: 375377.CrossRefGoogle Scholar
Tadmor, N. H., Eyal, E. and Benjamin, R. W. 1974. Plant and sheep production on semiarid annual grassland in Israel. Journal of Range Management 27: 427432.CrossRefGoogle Scholar