Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-19T02:09:32.675Z Has data issue: false hasContentIssue false
  • English
  • Français

Concurrent studies of the flow of digesta in the duodenum and of exocrine pancreatic secretion of calves

4.* The effect of age

Published online by Cambridge University Press:  09 March 2007

J. H. Ternouth ,
J. H. B. Roy  and
Susan M. Shotton
J. H. Ternouth
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
J. H. B. Roy
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Susan M. Shotton
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1. The effect of age on the flow of duodenal digesta and of pancreatic secretion was studied in preruminant calves fitted with duodenal re-entrant and pancreatic sac cannulas. In Expt 1 a comparison was made at 7, 24 and 63 d of age of Ayrshire calves given whole milk, and in Expt 2 Friesian calves given milk-substitute diets were studied during the period 16–37 d of age.

2. For the Ayrshire calves, ad lib. whole-milk intake increased with age, but whole-milk intake on a per kg metabolic body-weight (W0.75) basis did not alter. As the intake increased with age, the whey fluids were passed out of the abomasum more rapidly.

3. As judged by the mean duodenal pH values and the values for ‘chloride ion minus sodium ion’ concentration in the digesta, and for apparent secretions (total quantity recovered at duodenal cannula during 12 h after feeding minus intake) the duodenal digesta became more acid as the Ayrshire calves became older. There was no change with age in the extent of degradation of the milk proteins as indicated by the protein-nitrogen: total N values for duodenal digesta.

4. The volume of pancreatic fluids secreted by the Ayrshire calves increased markedly with age, but when expressed on a per kg W0.75 the volume did not increase after 24 d of age. In absolute terms and also in relation to whole-milk intake or W0.75 there was a large increase in secretion of total protease, a very large increase in α-amylase (EC 3.2.1.1) but no change in trypsin (EC 3.4.4.4) activities with age.

5. In the Friesian calves secretion of pancreatic fluid and activities of α-chymotrypsin (EC 3.4.4.5), α-amylase, lipase (EC 3.1.1.3) and ribonuclease (EC 2.7.7.16, 2.7.7.17) but not trypsin or total protease increased with age.

6. The extent of the increase in secretion of pancreatic enzymes during the first hour after the Friesian calves were fed milk-substitute diets differed between enzymes.

7. The changes in the quantities of pancreatic enzymes secreted are discussed in relation to the changes in the digestibility of milk-substitute diets.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 36 , Issue 3 , November 1976 , pp. 523 - 535
Copyright
Copyright © The Nutrition Society 1976

References

Bartlett, M. S. (1934). Jl R. statist. Soc. Suppl., 1, 252.CrossRefGoogle Scholar
Gorrill, A. D. L. & Thomas, J. W. (1967). J. Nutr. 92, 215.CrossRefGoogle Scholar
Gorrill, A. D. L., Thomas, J. W., Stewart, J. E. & Morrill, J. L. (1967). J. Nutr. 92, 86.CrossRefGoogle Scholar
Hill, K. J. (1956). Q. Jl exp. Physiol. 41, 421.CrossRefGoogle Scholar
Hill, K. J., Noakes, D. E. & Lowe, R. A. (1970). In Physiology of Digestion and Metabolism in the Ruminant, p. 166 [Phillipson, A. T. editor]. Newcastle upon Tyne: Oriel Press.Google Scholar
Hopkins, D. T., Warner, R. G. & Loosli, J. K. (1959). J. Dairy Sci. 42, 1815.CrossRefGoogle Scholar
Large, R. V. (1964). Anim. Prod. 6, 169.Google Scholar
McCormick, R. J. & Stewart, W. E. (1967). J. Dairy Sci. 50, 568.CrossRefGoogle Scholar
Morrill, J. L., Stewart, W. E., McCormick, R. J. & Fryer, H. C. (1970). J. Dairy Sci. 53, 72.CrossRefGoogle Scholar
Mylrea, P. J. (1966 a). Res. vet. Sci. 7, 333.CrossRefGoogle Scholar
Mylrea, P. J. (1966 b). Res. vet. Sci. 7, 394.CrossRefGoogle Scholar
Raven, A. M (1970). J. Sci. Fd Agric. 21, 352.CrossRefGoogle Scholar
Raven, A. M. & Robinson, K. L. (1964). J. Soc. Dairy Technol. 17, 5.CrossRefGoogle Scholar
Reynolds, J. D. (1972). Transport and secretion of pancreatic enzymes in the sheep. BSc (Hons) Thesis, University of New South Wales, Australia.Google Scholar
Roy, J. H. B. (1970). The Calf, Vol. 2, 3rd ed. London: Butterworths.Google Scholar
Roy, J. H. B., Shillam, K. W. G., Thompson, S. Y. & Dawson, D. A. (1961). Br. J. Nutr. 15, 541.CrossRefGoogle Scholar
Roy, J. H. B., Stobo, I. J. F. & Gaston, H. J. (1970). Br. J. Nutr. 24, 459.CrossRefGoogle Scholar
Roy, J. H. B., Stobo, I. J. F., Gaston, H. J., Shotton, S. M. & Ganderton, P. J., (1973) Anim. Prod. 17, 109.Google Scholar
Sasaki, Y. (1968). Jap. J. zootech. Sci. 39, 333.Google Scholar
Schingoethe, D. J., Gorrill, A. D. L., Thomas, J. W. & Yang, M. G. (1970). Can.J. Physiol. Pharmac. 48, 43.CrossRefGoogle Scholar
Shillam, K. W. G. & Roy, J. H. B. (1963). Br. J. Nutr. 17, 171.CrossRefGoogle Scholar
Siddons, R. C. (1968). Biochem. J. 108, 839.CrossRefGoogle Scholar
Taylor, R. B. (1962). Res. vet. Sci. 3, 63.CrossRefGoogle Scholar
Ternouth, J. H. (1971). Studies of the role of the abomasum and pancreas in digestion in the young calf. PhD Thesis, University of Reading.Google Scholar
Ternouth, J. H. & Buttle, H. L. (1973). Br. J. Nutr. 29, 387.CrossRefGoogle Scholar
Ternouth, J. H., Roy, J. H. B. & Siddons, R. C. (1974). Br. J. Nutr. 31, 13.CrossRefGoogle Scholar
Ternouth, J. H., Roy, J. H. B., Stobo, I. J. F., Ganderton, P. J., Gillies, C. M. & Shotton, S. M. (1974). Br. J. Nutr. 32, 37.CrossRefGoogle Scholar
Ternouth, J. H., Roy, J. H. B., Thompson, S. Y., Toothill, J., Gillies, C. M. & Edwards-Webb, J. D. (1975). Br. J. Nutr. 33, 181.CrossRefGoogle Scholar
Ternouth, J. H., Siddons, R. C. & Toothill, J. (1971). Proc. Nutr. Soc. 31, 89A.Google Scholar
Thomke, S. (1963 a). Züchtungskunde 35, 215.Google Scholar
Thomke, S. (1963 b). Züchtungskunde 35, 265.Google Scholar
Toullec, R. & Mathieu, C. M. (1969). Annls Biol. anim. Biochim. Biophys. 9, 139.CrossRefGoogle Scholar
Wardrop, I. D. & Coombe, J. B. (1960). J. agric. Sci., Camb. 54, 140.CrossRefGoogle Scholar
Warner, R. G., Flatt, W. P. & Loosli, J. K. (1956). J. agric. Fd Chem. 4, 788.CrossRefGoogle Scholar
Zerebcov, P. I. & Seryh, M. M. (1962). Izv. timiryazev. sel'.-khoz. Akad. no. 4, p. 214.Google Scholar