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Sweating rate and the electrolyte content of skin secretions of Bos taurus and Bos indicus cross-bred cows

Published online by Cambridge University Press:  27 March 2009

K. G. Johnson
K. G. Johnson
Affiliation:
Department of Physiology, University of Queensland, Brisbane, 4067, Australia
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Summary

Sweating rate and the electrolyte content of secretions from the skin of cattle have been measured on five Bos taurus and five B. indicus cross-bred cows by absorbing secretions into filter papers under polythene disks applied to shaved skin areas on the shoulder, sacral and lumbar regions for 5 min. The increase in weight of the filter paper was taken as a measure of sweating rate and the distilled water eluate from the filter paper was analysed for sodium and potassium. Animals were exposed for 4 h to air temperatures of 20–45 °C at 30% r.h., and for 5–7 h to air temperatures of 40 and 45 °C at 40% r.h. Estimated sweating rates were low by comparison with previously reported values, probably due to rising levels of humidity under the polythene disks during exposure to the skin. B. indicus cross-bred cows had higher sweating rates than B. taurus cows at high air temperatures but the difference between the groups was not significant statistically. Sweating rates were generally highest on the shoulder and lowest on the lumbar region.

The amounts of sodium and potassium recovered from filter papers were small and very variable at low air temperatures but increased significantly with air temperature (P < 0·01). No significant differences in the amounts of electrolyte recovered from filter papers were recorded between the species groups or between different sites of collection. The secretions from cattle skin at high ambient temperatures contained at least four to five times as much potassium as sodium. Total sodium and potassium loss through the skin of these experimental animals at the highest ambient temperatures was estimated to be no more than 1–3 % of the sodium and potassium intake in the feed. Absorbing sweat on to filter paper as a method of measuring sweating rate and sweat composition is rather less satisfactory for use with cattle than with man.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 3 , December 1970 , pp. 397 - 402
Copyright
Copyright © Cambridge University Press 1970

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References

Allen, T. E., Pan, Y. S. & Hayman, R. H. (1963). The effect of feeding on evaporative heat loss and body temperature in Zebu and Jersey heifers. Aust. J. agric. Res. 14, 580–93.CrossRefGoogle Scholar
Blaxter, K. L. & Rook, J. A. F. (1957). The indirect determination of energy retention in farm animals. II. Studies on the validity of the method. J. agric. Sci., Camb. 48, 210–19.CrossRefGoogle Scholar
Brown, M. A. & Motasem, M. M. (1965). Comparisons of two techniques for measuring relative rates of moisture evaporation from limited skin areas of dairy cattle. J. Dairy Sci. 48, 1643–6.CrossRefGoogle Scholar
Cage, G. W. & Dobson, R. L. (1965). Sodium excretion and reabsorption in the human eccrine sweat gland. J. clin. Invest. 44, 1270–6.CrossRefGoogle Scholar
Findlay, J. D. & Jenkinson, D. McE (1964). Sweat gland function in the Ayrshire calf. Ses. vet. Sci. 5, 109–15.CrossRefGoogle Scholar
Freeborn, S. B., Regan, W. M. & Berry, L. J. (1934). The effect of petroleum oil fly sprays on dairy cattle. J. econ. Ent. 27, 382–8.CrossRefGoogle Scholar
Gordon, R. S. & Cage, G. W. (1966). Mechanism of water and electrolyte secretion by the eccrine sweat gland. Lancet i, 1246–50.CrossRefGoogle Scholar
Joshi, B. C., Joshi, H. B., McDowell, R. E. & Sadhu, D. P. (1968). Composition of skin secretions from three Indian breeds of cattle under thermal stress. J. Dairy Sci. 51, 917–20.CrossRefGoogle ScholarPubMed
McLean, J. A. (1963a). Measurement of cutaneous moisture vaporization from cattle by ventilated capsules. J. Physiol., Lond. 167, 417–26.CrossRefGoogle ScholarPubMed
McLean, J. A. (1963b). The regional distribution of cutaneous moisture vaporization in the Ayrshire calf. J. agric. Sci., Camb. 61, 275–80.CrossRefGoogle Scholar
Ohara, K. (1966). Chloride concentration in sweat; its individual, regional, seasonal and some other variations, and interrelations between them. Jap. J. Physiol. 16, 274–90.CrossRefGoogle ScholarPubMed
Regan, W. M. & Richardson, G. A. (1938). Reactions of the dairy cow to changes in environmental temperature. J. Dairy Sci. 21, 73–9.CrossRefGoogle Scholar
Rhoad, A. O. (1940). A method of assaying genetic differences in the adaptability of cattle to tropical and subtropical climates. Emp. J. exp. Agric. 8, 190–8.Google Scholar
Schleger, A. V. & Turner, H. G. (1965). Sweating rates of cattle in the field and their reaction to diurnal and seasonal changes. Aust. J. agric. Res. 16, 92–106.CrossRefGoogle Scholar
Stacy, B. D., Brook, A. H. & Short, B. F. (1963). The relationship between suint and the sweat glands. Aust. J. agric. Res. 14, 340–8.CrossRefGoogle Scholar
Taneja, G. C. (1956). Tropical adaptation of cattle: experimental inquiry into the effects of high air temperature on pregnancy and on cutaneous water loss. Ph.D. Thesis: University of Queensland.Google Scholar