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Related Experiment Videos

Conjugated linoleic acid changes swine performance and carcass composition.

R L Thiel-Cooper1, F C Parrish, J C Sparks

  • 1Department of Animal Science, Iowa State University, Ames 50011, USA.

Journal of Animal Science
|July 24, 2001
PubMed
Summary

Dietary conjugated linoleic acid (CLA) supplementation in pigs linearly increased average daily gain and improved feed efficiency. CLA also reduced backfat and improved carcass composition, with CLA depositing into pork tissues.

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Area of Science:

  • Animal Science
  • Nutritional Biochemistry
  • Swine Production

Background:

  • Conjugated linoleic acid (CLA) comprises positional and geometric isomers of linoleic acid.
  • Previous studies in animals suggest CLA can enhance feed efficiency, reduce body fat, and increase lean tissue.
  • CLA's potential benefits in swine performance and body composition warrant further investigation.

Purpose of the Study:

  • To evaluate the effects of dietary conjugated linoleic acid (CLA) supplementation on pig performance and carcass composition.
  • To determine if CLA is deposited in pork tissues when supplemented in the diet.
  • To assess the dose-dependent effects of CLA on growth, feed intake, and body fat reduction in growing pigs.

Main Methods:

  • Forty crossbred pigs were fed diets supplemented with varying concentrations of CLA (0, 0.12, 0.25, 0.5, or 1.0%).

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  • Performance metrics including average daily gain, feed intake, and gain-to-feed ratio were recorded over 14-day intervals.
  • Carcass composition was assessed using ultrasound and dissection, with backfat depth, loin eye area, and fat deposition measured. Belly firmness and tissue CLA concentrations were also analyzed.

    • Main Results:

    • Average daily gain and the gain:feed ratio increased linearly with increasing dietary CLA levels.
    • Pigs fed CLA exhibited reduced 10th rib backfat and less fat depth over the loin eye compared to controls.
    • Dietary CLA was incorporated into subcutaneous fat and lean tissues, with belly firmness increasing linearly with CLA concentration.

    Conclusions:

    • Dietary conjugated linoleic acid (CLA) positively impacts swine performance by enhancing growth and feed efficiency.
    • CLA supplementation effectively reduces backfat deposition and improves overall carcass composition in pigs.
    • The incorporation of CLA into pig tissues confirms its bioavailability and suggests potential for enhanced pork quality.