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Dietary arginine requirement of juvenile grass carp C tenopharyngodon idella ( V alenciennes in C uvier & V alenciennes, 1844)
Author(s) -
Gao YuJie,
Yang HuiJun,
Guo DingQian,
Liu YongJian,
Yu Yingying,
Chen ShiJun,
Tian LiXia
Publication year - 2015
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12469
Subject(s) - grass carp , arginine , biology , zoology , juvenile , ornithine , carp , casein , amino acid , biochemistry , food science , fish <actinopterygii> , fishery , ecology
This experiment was conducted to estimate the optimum requirement of arginine for juvenile grass carp C tenopharyngodon idella . Six isonitrogenous (38%) and isoenergetics (16 MJ kg −1 ) semi‐purified diets containing casein and gelatine with graded level of arginine (0.93, 1.20, 1.51, 1.84, 2.10 and 2.41 g 100 g −1 DM ) were formulated. Each diet was randomly assigned to triplicate groups of 25 fish each tank (initial weight: 3.84 ± 0.01) for 10 weeks. 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.