Fisheries science
Print ISSN : 0919-9268
Metabolic Response to Dietary Lipid to Protein Ratios in Common Carp
Sadao ShimenoDriss KheyyaliTakafumi Shikata
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1995 Volume 61 Issue 6 Pages 977-980


Common carp Cyprinus carpio were fed at a constant feeding rate for 30 days on isoenergetic diets containing different levels of lipid (9-18%) and protein (44-59%), and activities of several hepatopancreatic enzymes together with serum andbody compositions were determined. With increasing lipid contents and decreasing protein contents in diet, the levels of lipogenic, gluconeogenic, and amino aciddegrading enzymes together with glycogen were decreased in the hepatopancreas, while those of serum free fatty acid and cholesterol, and hepatopancreatic fatwere increased. Therefore, high correlationcoefficients were obtained between dietary lipid contents and these biochemical parameter levels. The results suggestthat dietary supplementation of lipid depresses lipogenesis, glycogen synthesis, gluconeogenesis, and amino acid degradation in the hepatopancreas.

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