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White Sturgeon Tissue Fatty Acid Compositions Are Affected by Dietary Lipids^{1, 2,}

Department of Animal Science ^* Department of Food Science and Technology, University of California, Davis, CA 95616

Juvenile white sturgeon (Acipenser transmontanus) were fed eight isonitrogenous and isoenergetic purified diets for 9 wk to study their ability to utilize different dietary lipids. Each diet contained 15% of control oil mixture (corn oil-cold liver oil-lard, 1:1:1), corn oil, cod liver oil, lard, linseed oil, soybean oil, safflower oil or canola oil. No significant (P > 0.05) differences in percentage of body weight increase, feed efficiency or body composition were observed among sturgeon fed the different lipids. Tissue fatty acid compositions most sensitive to dietary lipids were those of muscle and liver, whereas brain fatty acid composition was the least sensitive. Results of this study indicate that it is possible to increase the levels of (n-3) polyunsaturated and highly unsaturated fatty acids in sturgeon muscle by feeding the fish lipids high in these fatty acids for 9 wk.

KEY WORDS: • lipids • fatty acid composition • growth • sturgeon

¹ This work is a result of research sponsored in part by NOAA, National Sea Grant College Program, Department of Commerce, under grant no. NA85AA-D-SG140, project no. R/A-67, through the California Sea Grant College Program, and in part by the California State Resources Agency. The United States government is authorized to reproduce and distribute this material for governmental purposes.

² The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact.

³ To whom correspondence should be addressed.

Manuscript received 30 December 1992. Revision accepted 27 May 1993.