J. Anim Sci.
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J. Anim Sci. 1977. 44:242-248.
© 1977 American Society of Animal Science
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Variations in the Concentrations of Blood Plasma Free Amino Acids in Suckled and Fasted Neonatal Pigs1

E. R. Chavez and H. S. Bayley2

University of Guelph,3, Guelph, Ontario, Canada NIG 2W1

Abstract

Piglets were removed from the sow between 6 and 9 hr after birth and samples of blood plasma were obtained from 20 pigs immediately, and from seven and 15 pigs, 6 and 24 hr, respectively, after removal from the sow. Proline was the predominant plasma free amino acid in the pigs which had been suckling, but its concentration fell once the pigs were taken from the sow. The concentrations of all the amino acids (except phenylalanine) declined during the first 6 hr in which the piglets were prevented from suckling. Prolonging the fast 24 hr resulted in declines in the concentrations of alanine, asparagine, glutamate and tyrosine, but increases in the concentrations of glycine, arginine, isoleucine, leucine and valine. There were wide variations in the concentrations of some of the amino acids within the three groups of piglets, particularly in those which had been suckling until they were sampled. There were some significant simple correlations between the concentrations of metabolically related amino acids in the three groups of piglets.

Footnotes

1 This work was supported by the National Research Council of Canada and by the Ontario Ministry of Agriculture and Food.

2 The authors are grateful to Dr. I. McMillan for his advice and assistance in the statistical analyses of the data.

3 Department of Nutrition.






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Copyright © 1977 by the American Society of Animal Science.