التفاصيل البيبلوغرافية
| العنوان: |
Effect of different dietary protein and lipid levels on growth performance, body composition of juvenile red swamp crayfish ( Procambarus clarkii). |
| المؤلفون: |
Xu, Wei-Na1, Liu, Wen-Bin1 wbliu@njau.edu.cn, Shen, Mei-fang2, Li, Gui-Feng1, Wang, Ying1, Zhang, Wei-wei1 |
| المصدر: |
Aquaculture International. Jun2013, Vol. 21 Issue 3, p687-697. 11p. |
| مصطلحات موضوعية: |
*PROCAMBARUS clarkii, *PROTEINS, *LIPIDS, *CRAYFISH, *BODY composition of fish, *FISH growth |
| مستخلص: |
We evaluated the effect of dietary protein and lipid on growth and body composition in juvenile red swamp crayfish ( Procambarus clarkii). Nine groups of crayfish were fed nine experimental diets containing three levels of protein (24, 27, and 30 %) and three levels of lipid (4, 7, and 10 %) for 8 weeks. We used a 3 × 3 factorial model with four replicates and 12 crayfish (initial average weight, 2.52 ± 0.04 g) per replicate. We measured weight gain ratio (WG), specific growth rate (SGR), and body composition. WG and SGR were significantly ( P < 0.05) affected by dietary lipid but not significantly ( P < 0.05) affected by dietary protein. When grouped by lipid levels, the WG of crayfish fed diets containing 7 % lipid was higher than that of crayfish fed diets containing 4 or 10 % lipid. The diet containing 30 % protein and 7 % lipid promoted the most efficient growth (WG: 483.38 %, SGR: 3.14 % day). Dietary protein and lipid had no effect on condition factor or the viscous content (VC). Dietary protein, but not lipid, had a significant ( P = 0.038) effect on the muscle content (MC). Crayfish fed a diet containing 27 % protein and 4 % lipid had the highest ( P < 0.05) MC (16.16 %). Dietary protein levels also had a significant ( P = 0.04) effect on the shell content (SC). SC was higher in crayfish fed a 30 % protein diet than in those fed 24 or 27 % protein. Proximate analysis suggested that crayfish fed a diet containing 27 % protein had a significantly higher nutritive composition than fish fed 24 or 30 % protein. Dietary protein also affected both whole body and muscle dry matter (DM) content. Similarly, both dietary protein and lipid affected whole-body crude lipid. Hepatopancreas DM, lipid content, and protein content were affected by dietary lipid. In conclusion, a diet containing 4-7 % lipid and 27 % protein with a protein to digestible energy ratio of 17-21 g protein·MJ appeared optimal. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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