DIETARY PHENYLALANINE REQUIREMENT OF THE JUVENILE PACIFIC WHITE SHRIMP LITOPENAEUS VANNAMEI (BOONE) REARED IN LOW-SALINITY WATER
文献类型： 外文期刊
作者： Jin, Yan 1 ; Liu, Fu-Jia 2 ; Liu, Yong-Jian 3 ; Tian, Li-Xia 3 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, 300 Jungong Rd, Shanghai 200090, Peoples R China
2.Guangdong Haid Grp Co Ltd, 42 Wanbo Fourth Rd, Guangzhou 511445, Guangdong, Peoples R China
3.Sun Yat Sen Univ, Sch Life Sci, Inst Aquat Econ Anim, 135 Xingangxi Rd, Guangzhou 510275, Guangdong, Peoples R China
关键词： Litopenaeus vannamei; low salinity; growth performance; amino acid balance; phenylalanine requirement; hemolymph metabolites
期刊名称：JOURNAL OF SHELLFISH RESEARCH （ 影响因子：1.396； 五年影响因子：1.47 ）
ISSN： 0730-8000
年卷期： 2019 年 38 卷 1 期
页码：
收录情况： SCI
摘要： Six diets with different concentrations of L-phenylalanine (10.71, 12.71, 14.71, 16.71. 18.71, and 20.71 g kg(-1) dry diet) were offered to the Pacific white shrimp Litopenaeus vannamei (Boone) reared in low-salinity water (0.50-1.20 g L-1) to determine the phenylalanine requirement. After an 8-wk feeding trial, the results indicated that weight gain was highest in shrimps treated with 16.71 g kg(-1) dietary phenylalanine (diet P4) and that lower or higher dietary phenylanine supplementary reduced weight gain (P < 0.05). Moreover, the highest final body weight, body protein deposition (BPD), and relative muscle weight, and the lowest hemolymph urea nitrogen concentration, alanine aminotransferase, and aspartate aminotransferase activities were also found in group P4 (P <0.05). Hemolymph metabolite profile showed that deficiencies or excess amounts of dietary phenylalanine mainly affected amino acids and energy metabolism. Polynomial regression calculated using weight gain rate, feed conversion ratio, and BPD indicated that the optimal dietary phenylalanine requirement for L. vannamei reared in low-salinity water was 15.81 g kg(-1) of dry diet, corresponding to 38.56 g kg(-1) of dietary protein.
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