Evaluating the effects of dietary resistant starch on growth, digestion, metabolism, immunity and resistance to ammonia stress in Litopenaeus vannamei
文献类型: 外文期刊
作者: Duan, Yafei 1 ; Xie, Mujiao 1 ; Wang, Yun 1 ; Ding, Xian 1 ; Zhang, Jiasong 1 ;
作者机构: 1.Minist Agr & Rural Affairs, Key Lab Fishery Ecol & Environm, Key Lab South China Sea Fishery Resources Exploit, Guangzhou, Guangdong, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou, Guangdong, Peoples R China
关键词: ammonia stress; digestive; growth; immune; Litopenaeus vannamei; resistant starch
期刊名称:AQUACULTURE NUTRITION ( 影响因子:3.497; 五年影响因子:3.78 )
ISSN: 1353-5773
年卷期: 2019 年 25 卷 4 期
页码:
收录情况: SCI
摘要: Resistant starch (RS) is considered to be a good alternative to antibiotics. A 56-day feeding trial was followed by induction of acute ammonia stress to evaluate the effects of dietary RS on growth, digestion, metabolism, immunity and resistance to ammonia stress in Litopenaeus vannamei. The four diets used differed only in RS content: 0 g/kg (Control), 10 g/kg (RS1), 30 g/kg (RS2) and 50 g/kg (RS3). The results showed that dietary RS improved the growth and the survival rates of shrimp exposed to ammonia stress. At 56 days, the activity of digestive and metabolic enzymes (amylase, lipase, pepsin, hexokinase and pyruvate kinase) was increased in the three RS groups, while trypsin activity only increased in the RS1 and RS2 groups; immune-related parameters (the total antioxidant capacity; the activity of superoxide dismutase, total nitric oxide synthase and phenoloxidase; and the expression of heat-shock protein 70, thioredoxin, prophenoloxidase, lysozyme and toll gene) were increased in the three RS groups. After exposure to ammonia stress, all the selected immune parameters of the three RS groups were higher than those of the control group at 24 hr. Therefore, dietary RS improved the growth, digestion, metabolism, immunity and resistance to ammonia stress in L. vannamei.
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