Fisheries and Aquatic Sciences

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Effect of Dietary Conjugated Linoleic Acid on Growth, Lipid Class, and Fatty Acid Composition in Rainbow Trout(Oncorhynchus mykiss)

  • Guo, Rui (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University) ;
  • Jeong, U-Cheol (Department of Marine Biology and Aquacultue, Gyeongsang National University) ;
  • Kang, Seok-Joong (Department of Marine Biology and Aquacultue, Gyeongsang National University) ;
  • Choi, Yeung-Jun (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University) ;
  • Choi, Byeong-Dae (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University)
  • Published : 2008.09.30
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Abstract

The development of a fish that functionally provides both antioxidant and fat-reducing effects is an important goal in nutrition and aquaculture research. Dietary conjugated linoleic acid(CLA) can be successfully incorporated in fish muscle and viscera, but CLA and carotenoids have not been evaluated in such fish. An 8 weeks growth trial was conducted using rainbow trout, and all fish were fed twice daily with experimental diets containing graded amounts of CLA(1% and 5%). At the end of the experiment, the daily growth index, feed conversion rate, lipid class, and fatty acid composition were determined. Dietary CLA did not enhance the growth parameters of rainbow trout but did improve the feed conversion rate. The muscular polar lipid content decreased during the feeding period, while the content was stable in the viscera. In addition, a diet high in CLA decreased the polyunsaturated fatty acid content, but had no effect on the content of monounsaturated and saturated fatty acid in muscle.

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References

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