Journal
AQUACULTURE RESEARCH
Volume 51, Issue 2, Pages -Publisher
WILEY
DOI: 10.1111/are.14431
Keywords
growth; interaction; level; lipid; protein; Sillago sihama
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Funding
- Science and Technology Department of Guangdong Province [2015A020209170]
- China Agriculture Research System [CARS-47]
- Marine & Fisheries Department of Guangdong Province [A201608C06]
- Science and Technology Bureau of Zhanjing [2016A3022]
- Guangdong Ocean University [201834]
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A 5 x 3 factorial growth trial was conducted to evaluate optimal dietary protein and lipid levels (dietary protein level, DP; dietary lipid level, DL) for juvenile Sillago sihama (S. sihama) (2.0 +/- 0.02 g, initial weight). Fish were fed 15 diets containing 5 DPs (350, 400, 450, 500 and 550 g/kg) and 3 DLs (60, 90 and 120 g/kg) for 8 weeks. The interaction between proteins and lipids significantly influenced the feed conversion ratio, condition factor, body composition, antioxidant indices and lipase activity (p < .05). DP 450 g/kg showed the highest average final body weight. DPs 500 and 550 g/kg significantly decreased the protein efficiency ratio (p < .05). DL 120 g/kg showed the highest percentage weight gain. The low feed conversion ratio was found in diets P45L12, P55L9 and P55L12. Diet P45L12 showed high superoxide dismutase activities. DP 450 g/kg showed the lowest average malondialdehyde content. Lipase activity was increased by increasing DP (p < .05) with a fall at DP 550 g/kg. Under the present experimental conditions, the optimal DP for S. sihama was 450 g/kg under the DL 120 g/kg.
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