Dietary arginine requirement of juvenile grass carp Ctenopharyngodon idella (Valenciennes in Cuvier & Valenciennes, 1844)

作者：Gao, Yu-Jie; Yang, Hui-Jun; Guo, Ding-Qian; Liu, Yong-Jian; Yu, Ying-ying; Chen, Shi-Jun; Tian, Li-Xia^*

来源：Aquaculture Research, 2015, 46(12): 3070-3078.

DOI：10.1111/are.12469

• grass carp
• arginine requirement
• growth performance
• biochemical parameters
• amino acid composition

This experiment was conducted to estimate the optimum requirement of arginine for juvenile grass carp Ctenopharyngodon idella. Six isonitrogenous (38%) and isoenergetics (16MJkg(-1)) semi-purified diets containing casein and gelatine with graded level of arginine (0.93, 1.20, 1.51, 1.84, 2.10 and 2.41g100g(-1) DM) were formulated. Each diet was randomly assigned to triplicate groups of 25 fish each tank (initial weight: 3.84 +/- 0.01) for 10weeks. The highest weight gain (WG, %) was recorded when arginine level was 2.10% of the diet. Dietary arginine level higher than 1.84% significantly increased the protein contents of whole body. Whole body amino acid composition of juvenile grass carp was not significantly affected by the dietary arginine level. Plasma-free arginine level was increased linearly with increasing of arginine level in the diets, and the plasma-free ornithine level was significantly higher when the dietary arginine level was 2.41% compared with other groups. Quadratic model analysis of SGR data indicated that the minimum recommended dietary arginine requirement for grass carp was 2.17% of the diet, corresponding to 5.71% of dietary protein.

• 出版日期2015-12
• 单位中山大学