J. Anim Sci.
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J. Anim Sci. 1971. 33:983-986.
© 1971 American Society of Animal Science
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Certain Aspects on the Utilization of Carbohydrates by the Neonatal Pig

N. C. Steele1, L. T. Frobish1, L. R. Miller2 and E. P. Young3

U.S. Department of Agriculture, Beltswile 20705 and University of Maryland, College Park 20740

Abstract

GLUCOSE and fructose constitute the blood sugars of the fetal and early postnatal pig (Goodwin, 1956, 1957). Unlike glucose, the function of fructose is still undefined. Aherne et al. (1969b) demonstrated that the decline of blood fructose levels during the first 48 hr. postpartum could be attributed to the increased levels of urinary fructose. Curtis, Heidenreich and Foley (1964) suggested that fructose serves as an energy substrate in utero due to the high circulating levels found at birth. Failure to rear newborn pigs on synthetic diets containing fructose (Becker et al., 1954) and the inability to revive comatose fasted pigs with fructose injections (Aherne et al., 1969a) would indicate that if fructose does function as an energy source this function is terminated at parturition.

Experimental Procedure

Experiment 1. Fifty-seven crossbred pigs representing six litters were bled from the anterior vena cava (Carle and Dewhirst, 1942) and weighed immediately at birth to correlate blood sugar levels with birth weight. All pigs were returned to their dam and bled thereafter at 6-hr. intervals through the first 24 hr. postpartum to follow the changes in blood sugar composition. Ambient temperature was maintained at 28 C. Approximately 5 ml of blood was withdrawn at each sampling, treated with heparin (5 mg/ml) to prevent coagulation and centrifuged at 2,000xg for 10 minutes.

Footnotes

1 Animal Science Research Division, A.R.S.

2 Data Systems Application Division, A.R.S.

3 Department of Animal Science, University of Maryland.






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