Journal
JOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume 14, Issue 5, Pages 865-872Publisher
OCEAN UNIV CHINA
DOI: 10.1007/s11802-015-2572-6
Keywords
Litopenaeus vannamei; fish meal; extruded soybean meal; growth performance; feed utilization; nutrient digestibility
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Funding
- Special Fund for Agro-scientific Research in the Public Interest of China [201003020]
- Guangdong University Innovation Talents Cultivating Project of China [1009324]
- Guangdong Natural Science Foundation of China [S2012 040007863]
- Guangdong Province Universities and College Pearl River Scholar Funded Scheme [GD UPS-2011]
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Extruded soybean meal (ESBM) was evaluated as a protein source for partial replacement of fish meal (FM) in diets of juvenile Litopenaeus vannamei. In the control diet (Diet 1), FM protein was replaced with increasing dietary levels of ESBM (4.28%, 8.40%, 12.62%, 16.82%, and 25.26%) at 10%, 20%, 30%, 40%, and 60% levels (Diets 2 to 6, respectively). An eight-week feeding trial was conducted on 720 juvenile shrimp (0.67 g +/- 0.01 g mean initial weight), and nutrient digestibility of the six diets was determined. ESBM could replace 20% of FM without causing a significant reduction in growth of shrimp, but other dietary treatments strongly affected whole body composition. Crude protein content of the whole body fed Diet 6 was significantly lower than that fed Diet 2 (P < 0.05), while crude lipid content of the whole body fed Diet 5 or 6 was significantly higher than that fed Diet 2 (P < 0.05). Protein digestibilities of Diets 5 and 6 were significantly lower than that of Diet 1 (P < 0.05). Digestibility of lipids ranged from 96.97% in Diet 6 to 98.34% in Diet 3, whereas dry matter digestibility decreased with increasing replacement level. This study indicates that 20% FM replacement with ESBM in the basic diet containing 40% protein and 30% FM is optimal for juvenile L. vannamei.
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