立陶宛
苯丙氨酸
小虾
生物
动物科学
体重增加
盐度
血淋巴
代谢物
氨基酸
食品科学
体重
生物化学
渔业
生态学
内分泌学
作者
Yan Jin,Fujia Liu,Yongjian Liu,Tian Liu
出处
期刊:Journal of Shellfish Research
[BioOne (National Shellfisheries Association)]
日期:2019-04-17
卷期号:38 (1): 35-35
被引量:6
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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