QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Koong, L. J. Articles by Mersmann, H. J. Search for Related Content PubMed PubMed Citation Articles by Koong, L. J. Articles by Mersmann, H. J.

Effects of Plane of Nutrition on Organ Size and Fasting Heat Production in Genetically Obese and Lean Pigs

Roman L. Hruska U.S. Meat Animal Research Center, U.S. Department of Agriculture, Agricultural Research Service, P.O. Box 166, Clay Center, NE 68933

Fifteen obese and 15 lean pigs with an initial weight of 27 kg, three from each of five litters, were randomly assigned within litter to three treatments. The first treatment group (HL) was fed to gain 19 kg body weight during the first 35 days (period 1) and to lose 5 kg during the second 35 days (period 2). The second treatment group (MM) was fed to gain 7 kg during both periods 1 and 2. The third treatment group (LH) was fed to lose 5 kg during period 1 and to gain 19 kg during period 2. At the end of the 70-day period, all pigs were fasted for 30 hours, and fasting heat production (FHP) was measured by indirect calorimetry. The animals were slaughtered, and weights of stomach, small and large intestines, liver, pancreas, spleen, kidneys and heart were measured. Although all animals had the same final body weight, both obese and lean pigs on the higher plane of nutrition during period 2 had significantly higher FHP and higher weights for stomach, small and large intestines, pancreas, liver and kidneys. Lean pigs had significantly higher weights for stomach, large intestine, pancreas, heart, and spleen than their obese counterparts with no significant difference detected for small intestine, liver and kidneys. Statistical analyses did not reveal any difference between lean and obese pigs for FHP even though lean pigs on MM and LH treatments had 17 and 15% higher FHP values than obese pigs from the same treatment groups. Significant and positive correlations exist between FHP and weights of stomach, small intestine, large intestine, pancreas, liver and kidneys. These results indicate that prior nutritional history significantly influences FHP, which is highly correlated to weights of metabolically active organs for both genetically obese and lean pigs.

KEY WORDS: • nutritional history • organ weights • fasting heat production • obese and lean pigs

Manuscript received 14 March 1983.

This article has been cited by other articles:

				K. R. McLeod, R. L. Baldwin VI, M. B. Solomon, and R. G. Baumann Influence of ruminal and postruminal carbohydrate infusion on visceral organ mass and adipose tissue accretion in growing beef steers J Anim Sci, September 1, 2007; 85(9): 2256 - 2270. [Abstract] [Full Text] [PDF]

				T. G. Jenkins and C. L. Ferrell Daily dry matter intake to sustain body weight of mature, nonlactating, nonpregnant cows J Anim Sci, July 1, 2007; 85(7): 1787 - 1792. [Abstract] [Full Text] [PDF]

				J. J. Ramsey and K. Hagopian Energy Expenditure and Restriction of Energy Intake: Could Energy Restriction Alter Energy Expenditure in Companion Animals? J. Nutr., July 1, 2006; 136(7): 1958S - 1966S. [Abstract] [Full Text] [PDF]

				J. Fabian, L. I. Chiba, D. L. Kuhlers, L. T. Frobish, K. Nadarajah, and W. H. McElhenney Growth performance, dry matter and nitrogen digestibilities, serum profile, and carcass and meat quality of pigs with distinct genotypes J Anim Sci, May 1, 2003; 81(5): 1142 - 1149. [Abstract] [Full Text] [PDF]

				J. Fabian, L. I. Chiba, D. L. Kuhlers, L. T. Frobish, K. Nadarajah, C. R. Kerth, W. H. McElhenney, and A. J. Lewis Degree of amino acid restrictions during the grower phase and compensatory growth in pigs selected for lean growth efficiency J Anim Sci, October 1, 2002; 80(10): 2610 - 2618. [Abstract] [Full Text] [PDF]