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A note on annual reproductive rhythm in Marwari sheep of the Rajasthan Desert in India

Published online by Cambridge University Press:  02 September 2010

J. P. Mittal  and
P. K. Ghosh
J. P. Mittal
Affiliation:
Central Arid Zone Research Institute, Jodhpur, India
P. K. Ghosh
Affiliation:
Central Arid Zone Research Institute, Jodhpur, India
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Abstract

Seasonal fluctuations in oestrous activity and live weight were studied in ewes of the Marwari breed indigenous to the Rajasthan Desert in north-western India. Of the ewes examined 80 to 100% were in oestrus every month of the year, indicating thereby the non-seasonality of female reproductive activity in this breed. On average, each ewe exhibited heat 18 times a year. The incidence of silent heats was low (4·2 %). The average length of an oestrous cycle was 17 days, while the actual period of oestrus varied from 24 to 48 h with an average of 36 h. No seasonal effect on these activities could be observed. The maximum and minimum body weights of the animals were recorded during the autumn (October) and summer (June) months respectively. The body weights differed significantly (P<0·05) between months. Sexual activity in these animals is, therefore, apparently not affected by changes in body weight. The continuous nature of oestrous activity in Marwari sheep may be economically exploited by regulating the lambing season according o t the prevailing ecological conditions and market demands, without the use of hormones.

Type
Research Article
Information
Animal Production , Volume 30 , Issue 1 , February 1980 , pp. 153 - 156
Copyright
Copyright © British Society of Animal Science 1980

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References

REFERENCES

Amir, D. and Volcani, R. 1965. The sexual season of the Awassi fat-tailed ewe. J. agric. Sci., Camb. 64: 83–85.CrossRefGoogle Scholar
Ghosh, P. K., Khan, M. S. and Abichandani, R. K. 1976. Effect of short-term water deprivation in summer on Marwari sheep. J. agric. Sci., Camb. 87: 221–223.Google Scholar
Hafez, E. S. E. 1952. Studies on the breeding season and reproduction of the ewe. J. agric. Sci., Camb. 42: 189–265.CrossRefGoogle Scholar
Joubert, D. M. 1962. Sex behaviour of purebred and crossbred Merino and Blackhead Persian ewes. J. Reprod. Fert. 3: 41–49.CrossRefGoogle ScholarPubMed
Mittal, J. P. and Ghosh, P. K. 1979. Comparative performance of indigenous and exotic sheep in the Indian arid zone. J. agric. Sci., Camb. 92: 273–276.Google Scholar
Noorshadi, S., Bennett, J. A. and Bunch, T. D. 1975. Estrus and ovulation in fat tailed sheep. J. Anim. Sci. 41: 282 (Abstr.).Google Scholar
Purohit, G. R., Ghosh, P. K. and Taneja, G. C. 1972. Water metabolism in desert sheep. Effects of various degrees of water restriction on the distribution of body water in Marwari sheep. Aust. J. agric. Res. 23: 685–691.Google Scholar
Sahni, M. S. and Sahni, K. L. 1976. Seasonal variation in oestrus activity and body weight changes in native sheep (Jaisalmeri) under semi arid conditions. Indian vet. J. 53: 22–27.Google Scholar
Sefidbakht, N., Mostafavi, M. S. and Farid, A. 1978. Annual reproductive rhythm and ovulation rate in four fat-tailed sheep breeds. Anim. Prod. 26: 177–184.Google Scholar
Sengupta, B. P., Mittal, J. P., Mittal, P. C., Pant, H. C. and Pandey, M. D. 1976. Studies on factors influencing lambing performance in PMSG-treated Magra ewes. Indian J. Anim. Sci. 46: 23–28.Google Scholar
Smith, L. W. and Hussien, M. 1935. A study of the effect of the climatic seasons on certain phases of sheep husbandry at the Government Cattle Farm, Hissar. Agriculture Live-Stk India. 5: 126–138.Google Scholar
Taleghani, H., Bunch, T. D., Bennett, J. A. and Foote, W. C. 1974. Estrous cycles in four fat-tailed breeds of sheep. J. Anim. Sci. 39: 165 (Abstr.).Google Scholar
Taneja, G. C. 1966. Fertility in sheep. 1. Conception rate in relation to lamb survival. Indian vet. J. 43:727–734.Google Scholar