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Dietary Protein Requirement of Juvenile Turbot(Scophthalmus maximus Linnaeus)

Journal of Ocean University of China 2015年第2期14卷 325-328页

作者： LIU Xingwang MAI Kangsen LIUFU Zhiguo AI Qinghui Key Laboratory of nutrition and feed of Department of Agriculture of China Ocean University of China Guangdong Evergreen feed Industrial Co. Ltd.

The dietary protein requirement of juvenile turbot(initial average weight, 38.2 g ± 0.1 g) reared indoor in aerated aquaria was determined in this study. Five energy equal experimental diets were formulated with fish meal as protein source, which contained different concentrations of protein(47.2%, 51.0%, 54.6%, 59.3% and 63.6% of dry diet). Three groups of fish with 18 individuals in each, were cultured in 300-L tanks and fed twice a day for 8 weeks. During culture, temperature was controlled between 15.0 and 18.0℃, salinity was controlled between 28.5 and 32.0, acidity was controlled between p H7.8 and p H8.5, and ammonia nitrogen was maintained below 0.03 mg L-1 and dissolved oxygen was maintained about 7 mg L-1. Results showed that the growth of fish was significantly affected by dietary protein content(P feed efficiency rate. No significant difference of feed intake and protein efficiency ratio was found among experimental diets(P > 0.05). Broken-line regression analysis of SGR showed that the optimal dietary protein requirement of turbot was about 57.0%.

关键词： turbot Scophthalmus maximus protein requirement feed nutrition

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