J. Anim Sci.
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J. Anim Sci. 1979. 49:1449-1457.
© 1979 American Society of Animal Science
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Within- and between-Litter Variation of Proximate Composition in New born and 10-Day-Old Landrace Swine1 ,2,

Anne Marie B. De Passillé3 and Thomas G. Hartsock4

Macdonald College of McGill University,5, Ste. Anne de Bellevue, Québec, Canada HOA 1CO

Abstract

Proximate composition of individuals from four litters of newborn and six whole litters of 10-day-old purebred Landrace piglets from primiparous and multiparous dams was determined. A dramatic increase in ether extract percentage occurred during the first 10 postpartum days as moisture and ash percentages decreased and protein increased. Average values for newborn and 10-day-old piglets, respectively were: weight 1.39 ± .26 and 3.07 ± .57 kg, moisture 79.17 ± .96 and 70.51 ± 1.36%; ether extract, .55 ± .17 and 9.92 ± 1.46%; protein 12.07 ± .73 and 14.90 ± .38% and ash, 4.63 ± .40 and 3.44 ± .31%. Although variation in proximate composition was small at birth, within as well as between-litter differences were observed. Carcasses of the heavier newborn piglets had lower moisture and higher protein percentages. Variation in the proximate composition of 10-day-old piglets was greater and accounted for, in part, by within and between-litter differences, plus in the case of moisture and ether extract percentages, differences in 10-day gain. Average values for three 10-day-old, slow-growing piglets were birth weight, 1.39 kg; 10-day weight, 2.13 kg; 10-day gain, .74 kg; moisture 75.49%; ether extract, 3.43%; protein, 15.34%; and ash, 4.37%. Although these piglets had a slow growth rate, their ether extract percentages increased by sixfold over the average value found for newborn piglets.

Footnotes

1 Supported in part by a grant from the National Research Council of Canada.

2 The assistance of Dr. B. W. Kennedy with statistical analyses and the technical assistance of Kaie M. Ojamaa are gratefully acknowledged by the authors.

3 Station de Recherche, Agriculture Canada, CP. 90, Lennoxville, P. Q., Canada, JIM 1Z3.

4 Dept. of Animal Science, Univ. of Maryland, College Park 20742.

5 Crampton Nutrition Laboratory, Dept. of Animal Science.






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Copyright © 1979 by the American Society of Animal Science.