Growth performance of adult red sea bream Pagrus major fed low-fish meal diet in commercial aquaculture
2017
Aoki, H. (Mie Prefecture Fisheries Research Institute, Owase, Mie (Japan). Owase Branch) | Matsukura, K. | Yamashita, H. | Miyamoto, A. | Shimizu, S. | Kinda, H. | Koshiishi, T. | Satoh, S. | Ishida, N.
Red sea bream culture generates a revenue of around 50 billion yen each year, and has been an important aquaculture business in Japan. This study evaluated the performance of adult red sea bream Pagrus major fed the combination of soybean meal (SBM) and corn gluten meal (CGM) as replacement protein sources for fish meal. Control diet containing 40% fish meal and the combination of SBM and CGM at 45% replacements, were used as treatments and those treatments were replicated thrice. Feeding experiments were conducted using practical large-scale net cages at the farming site in Mie, Ehime, and Nagasaki prefectures. Fish with weight ranging from 500-1,000 grams were fed the experimental diets for 4-6 months. There was no significant difference in terms of growth performance and feed performance among the treatments. The result of condition factor, hepatosomatic index, and hemochemical assessment indicated that the fish were in good physical condition for both treatments. Moreover, there were no significant differences in rheologic and freshness parameters of flesh between the control and test diet group. Thus, the combination of SBM and CGM at 45% replacement is thereby recommended to be used as an effective alternative protein source for adult red seabream commercial aquaculture.
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