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Sodium appetite and sodium metabolism in ruminants assessed by preference tests

Published online by Cambridge University Press:  27 March 2009

F. R. Bell  and
Jennifer Sly
F. R. Bell
Affiliation:
Department of Medicine, Royal Veterinary College, London, NW 1 OTU
Jennifer Sly
Affiliation:
Department of Medicine, Royal Veterinary College, London, NW 1 OTU
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Summary

Adult sheep, unweaned and mature weaned calves have been examined by metabolic studies for sodium balance. The ratio of sodium input/output was near unity with only a very small amount of the ingested sodium salt being retained. A positive sodium balance was always present, with excess sodium salt being excreted. The main channel of sodium excretion was the kidney, although when sodium intake was increased the sodium content of the faeces showed a proportional increase. Unweaned calves, a few days old, were quite able to excrete excess sodium salts in concentrated urine.

There was a clear difference in preference for sodium salts over water, between weaned calves allowed access to sodium salts while being fed milk, and weaned calves denied sodium salts at the milk feeding stage. Sodium-naive calves showed a marked preference for sodium salt solutions while the sodium-experienced calves showed at best an indifference and sometimes even an aversion. With continued access to sodium salts the volume ingested declined steadily in both groups but food intake remained constant.

In both calves and sheep the preference for sodium salts showed considerable variation between animals. The evidence from parallel metabolic studies suggests that this variation indicates that salt intake is controlled by some mechanism, possibly in the central nervous system, which is activated by dynamic sodium metabolism. Our experimental results confirm that ruminants have a well developed salt taste but predilection for sodium salts could be a biochemical manifestation rather than a hedonic propensity.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 5 - 14
Copyright
Copyright © Cambridge University Press 1979

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References

Agricultural Research Council (1965). Nutrient Requirements of Farm Livestock, No. 2. Ruminants. London: Agricultural Research Council.Google Scholar
Beilharz, S. & Kay, R. N. B. (1963). The effects of rumenal and plasma sodium concentrations on the sodium appetite of sheep. Journal of Physiology 165, 468–483.CrossRefGoogle ScholarPubMed
Bell, F. R. (1959). Preference thresholds for taste discrimination in goats. Journal of Agricultural Science, Cambridge 52, 125–128.CrossRefGoogle Scholar
Bell, F. R. (1972). Relative importance of the sodium ion in homeostatic mechanisms in ruminant animals. Proceedings of the Royal Society of Medicine 65, 631–634.CrossRefGoogle ScholarPubMed
Bell, F. R. & Kitchell, R. L. (1966). Taste reception in the goat, sheep and calf. Journal of Physiology 183, 145–152.CrossRefGoogle ScholarPubMed
Bell, F. R. & Williams, H. L. (1960). The effect of sodium depletion on the taste threshold of calves. Journal of Physiology 151, 42–43.Google Scholar
Bernard, C. (1878–1879). Leçons sur les phénomènes de la vie communs aux animaux et aux végétaux. Vol. 1. Paris: J. B. Balliere et Fils.CrossRefGoogle Scholar
Blair-West, J. R., Coghlan, J. P., Denton, D. A., Goding, J. R., Wintour, M. & Wright, R. D. (1963). The control of aldosterone secretion. Recent Progress in Hormone Research 19, 311–383.Google ScholarPubMed
Bott, E.Denton, D. A. & Weller, S. (1967). The effect of Angiotensin II, renal hypertension and nephrectomy on the salt appetite of sodium deficient sheep. Australian Journal of Experimental Biology and Medical Science 45, 595–612.CrossRefGoogle ScholarPubMed
Denton, D. A. & Sabine, J. R. (1961). Selective appetite for Na+ shown by Na+ deficient sheep. Journal of Physiology 157, 97–116.CrossRefGoogle Scholar
Denton, D. A. (1965). Evolutionary aspects of the emergence of aldosterone secretion and salt appetite. Physiological Reviews 45, 245–295.CrossRefGoogle ScholarPubMed
Denton, D. A. (1966). Some theoretical considerations in relation to the innate appetite for salt. Conditional Reflex 1, 144–170.CrossRefGoogle Scholar
Denton, D. A. (1967). Salt Appetite. In Handbook of Physiology, Alimentary Canal, Control of Food and Water Intake, vol. 1, section 6 (ed. Code, C. F.), pp. 433–459. American Physiological Society, Washington, D. C.Google Scholar
Denton, D. A., Orchard, E. & Weller, S. (1969). The relation between voluntary sodium intake and body sodium balance in normal and adrenalectomized sheep. Communications in Behavioural Biology 3, 213–221.Google Scholar
Duthie, J. A. (1961). The electrolyte metabolism of sheep. Ph. D. thesis, University of Aberdeen.Google Scholar
Forbes, G. B., Tobin, R. B., Harrison, A. & McCoord, A. (1965). Effect of acute hypernatremia, hyponatremia and acidosis on bone sodium. American Journal of Physiology 209, 825–829.CrossRefGoogle ScholarPubMed
Harriman, A. E., & MacLeod, R. B. (1953). Discrimination thresholds of salt for normal and adrenalectomized rats. American Journal of Physiology 66, 465–471.Google ScholarPubMed
Kay, R. N. B. & Pfeffer, E. (1969). Movements of water and electrolytes into and from the intestine of the sheep. Physiology of Digestion and Metabolism in the Ruminant (ed. Phillipson, A. T.). Proceedings of the Third International Symposium, Oriel Press.Google Scholar
Kaunitz, H. (1956). Causes and consequences of salt consumption. Nature 178, 1141–1144.CrossRefGoogle ScholarPubMed
Michell, A. R. & Bell, F. R. (1969). Spontaneous sodium appetite and red cell type in sheep. In Olfaction and Taste, vol. 3 (ed. Pfaffmann, C.). New York: Rockafellar Press.Google Scholar
Michell, A. R. (1975). Relationship between sodium preference and haemoglobin type in sheep. British Veterinary Journal 131, 222–230.CrossRefGoogle ScholarPubMed
Michell, A. R. (1977). Acid-base status, salivary Na/K and electrolyte excretion in sheep with differing sodium appetite. British Veterinary Journal 133, 245–257.CrossRefGoogle ScholarPubMed
Pierce, A. W. (1968). Studies of salt tolerance of sheep. VII. Australian Journal of Agricultural Research 19, 577–587.Google Scholar
Pfaitmann, C. & Bare, J. K. (1950). Gustatory nerve discharges in normal and adrenalectomized rats. Journal of Comparative and Physiological Psychology 43, 320–324.Google Scholar
Renkema, J. A., Senshu, T., Gallard, D. E. & Brouwer, E. (1962). Regulation of sodium excretion and retention by the intestine in cows. Nature 195 389–390.CrossRefGoogle ScholarPubMed
Richter, C. P. (1939). Salt taste thresholds of normal and adrenalectomized rats. Endocrinology 24, 367–371.CrossRefGoogle Scholar
Richter, C. P. (1956). Salt appetite of mammals; its dependence on instinct and metabolism. In L'lnstinct dans le compartement des animaux et del' Homme, pp. 577–632. Paris: Masson et Cie.Google Scholar
Theios, J., Derivera, J. & Aronson, E. (1962). Modification of the rats saline intake by experience with specific concentrations. Psychological Reports 10, 487–490.CrossRefGoogle Scholar
Van Leeuwen, J. M. & Keukenzout, J. M. (1970). Domestic salt in cattle nutrition: physiological consequences of giving salt in diets low or not low in sodium. Verslagen van Landbouwkundige Onderzoekingen 737, 218.Google Scholar
Van Loon, H. W. (1937). The story of salt. Natural History 39, 79–98.Google Scholar
Van Weerden, E. J. (1961). The osmotic pressure and the concentration of some solutes of the intestinal contents and the faeces of the cow, in relation to absorption of the minerals. Journal of Agricultural Science, Cambridge 56, 317–324.CrossRefGoogle Scholar
Wolf, G. (1969). Innate mechanisms for regulation of sodium intake. In Olfaction and Taste, vol. 3 (ed. Pfaffmann, C.), pp. 548–553. New York: Rockafellar Press.Google Scholar
Wolf, G., McGovebn, J. F. & Dicaba, L. V. (1974). Sodium appetite: some conceptual and methodologio aspects of a model drive system. Behavioural Biology 10, 27–42.CrossRefGoogle Scholar