Dietary krill hydrolysates affect the expression of growth-related genes in juvenile turbot (Scophthalmus maximus L.)
文献类型： 外文期刊
作者： Zhang, Lili 1 ; Guo, Bin 1 ; Liang, Mengqing 1 ; Xu, Houguo 1 ; Wei, Yuliang 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Peoples R China
2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao, Shandong, Peoples R China
关键词： growth; insulin-like growth factor; Krill hydrolysate; neuropeptide Y; peptide transporters; turbot
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 2 期
页码：
收录情况： SCI
摘要： A 10-week feeding experiment in indoor flow-through seawater system was conducted to investigate the effects of dietary krill hydrolysate on the expression of growth-related genes in juvenile turbot (Scophthalmus maximus L.; initial body weight 9.45 +/- 0.01 g). Three isonitrogenous and isolipidic experimental diets containing high plant protein were formulated to contain 0 (control), 50 g/kg (LKH) and 100 g/kg (HKH) krill protein hydrolysate (KH) to replace fishmeal, respectively. Triplicate groups of 30 fish were fed for 10 weeks to apparent satiation twice daily. At the end of the feeding trial, the mRNA expressions of insulin-like growth factor (IGF-1) gene in liver, peptide transporters (PepT1) gene in pyloric caeca and proximal intestine and neuropeptide Y (NPY) gene in brain in all groups were determined. IGF-1, PepT1 and NPY expression levels in HKH group were significantly increased compared with those of LKH and control (p < 0.05), which was consistent with the SGR, feed efficiency, PER and PPV. These results indicated that dietary 100 g/kg krill hydrolysate could improve growth performance and upregulate the mRNA expression of IGF-1, PepT1 and NPY genes in juvenile turbot.
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