Shimeno, S., Hosokawa, H., Masumoto, T., Ando, H., Yamanaka, H., Ukawa, M.-1997
Bulletin of Marine Sciences and Fisheries, Kochi University, 15: 51-57
Abstract:
In order to investigate the effect of lipid supplementation to practical formulated diets containing defatted soybean meal and meat meal as alternative protein sources, juvenile yellowtail Seriola quinqueradiata were fed diets containing 16-24% lipid and 50-45% protein for 16 weeks. And, the growth, feed conversion and body composition were determined. In satiation feeding, the growth rates were relatively low in fish fed high lipid diets such as the 24% lipid diet at high feeding rates during the first half of the feeding trial, while they considerably improved in the second half at low feeding rates. Consequently, at the end of the experiment similar growth rates were obtained in all groups, and no marked differences in the body and blood compositions were observed. However, serum and body lipid concentrations increased with increasing dietary lipid levels. Restriction feeding of the diet containing 24% lipid produced a slight decrease in growth rate, but resulted in improved feed conversion rates, suggesting the importance of adequate feeding rates for fish culture.
(Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University, Monobe, Nankoku, Kochi 783, Japan)
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