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Water requirements of African goats and haired-sheep

Published online by Cambridge University Press:  27 March 2009

G. M. O. Maloiy  and
C. R. Taylor
G. M. O. Maloiy
Affiliation:
East African Veterinary Research Organization, Muguga, P.O. Kabete, Kenya and Museum of Comparative Zoology, Harvard University, Cambridge, Mass. 02138
C. R. Taylor
Affiliation:
East African Veterinary Research Organization, Muguga, P.O. Kabete, Kenya and Museum of Comparative Zoology, Harvard University, Cambridge, Mass. 02138
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Summary

A number of species of desert-dwelling ungulates (e.g. Grant's gazelle and oryx) can apparently survive desert conditions without drinking. We were interested in finding out whether goats and sheep herded in the arid Northern Frontier Region of Kenya utilized the same physiological strategies for reducing water requirements as the wild ungulates.

Using simulated desert conditions (12 h per day at22 °C alternating with 12 hper day at 40 °C) we found: (a) both goats and sheep used water amounting to about 8% of their body weight per day when water was available ad libitum; and (b) this was reduced to about half (or 4% body weight per day) when the water intake was restricted.

Evaporation was the major avenue of water loss under all experimental conditions. It was reduced from over 6% of body weight per day to about 3% in the simulated desert by restricting water intake.

Restricting water intake had no effect on the temperature regulation of goats and sheep as had been observed in the wild desert-dwelling ungulates.

It would appear that African goats and haired-sheep lack the physiological mechanisms and are not free to utilize the behavioural mechanisms involved in freeing wild desert-dwelling ungulates from their dependence on drinking water.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 77 , Issue 2 , October 1971 , pp. 203 - 208
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Macfarlane, W. V. (1964). Terrestrial animals in dry heat: ungulates. In Handbook of Physiology, Section 4: Adaptation to the Environment, pp. 509–39. Washington, D.C.: American Physiological Society.Google Scholar
MacGilivary, D. (1967). East African Livestock Survey. Volume II. Development Plans, 279 pp. Available from East African Community, Nairobi, Kenya.Google Scholar
Schoen, A. (1968). Studies on the water-balance of the East African goat. E. Afr. agric. For. J. 34, 256–62.Google Scholar
Taylor, C. R. (1968 a). The minimum water requirements of some East African bovids. Symp. zool. Soc. Lond. 21, 195–206.Google Scholar
Taylor, C. R. (1968 b). Hygroscopic food: a source of water for desert antelopes? Nature, Lond. 219, 181–82.CrossRefGoogle ScholarPubMed
Taylor, C. R. (1970 a). Strategies of temperature regulation: effect on evaporation in East African ungulates. Am. J. Physiol. 219, 1131–35.CrossRefGoogle ScholarPubMed
Taylor, C. R. (1970 b). Dehydration and heat: effects on temperature regulation of East African ungulates. Am. J. Physiol. 219, 1136–39.CrossRefGoogle ScholarPubMed