ABSTRACT: Lipids, together with proteins, are traditionally considered as primary fuels during aerobic swimming. The effects of dietary fat and carnitine supplements and exercise on the energy metabolism of juvenile fish were investigated. One hundred African catfish (Clarias gariepinus) were fed four isonitrogenous diets containing a fat level of 100 or 190 g kg -1 diet and one of the two levels of carnitine (15 and 1000 mg kg -1 ). Fish grew from 61 to 162 g in 10 wk. Thereafter, 6 fish per group swam vigor…
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