文献类型：期刊文献

英文题名：Graded levels of fish protein hydrolysate in high plant diets for turbot (Scophthalmus maximus): effects on growth performance and lipid accumulation

作者：Xu, Houguo[1,2];Mu, Yuchao[1,2];Zhang, Yue[3];Li, Jianqiang[4];Liang, Mengqing[1,2];Zheng, Keke[1,2];Wei, Yuliang[1,2]

机构：[1]Qingdao Natl Lab Marine Sci & Technol, Chinese Minist Agr Sustainable Utilizat Marine Fi, Key Lab, Yellow Sea Fisheries Res Inst, 106 Nanjing Rd, Qingdao 266071, Shangdong, Peoples R China;[2]Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, 106 Nanjing Rd, Qingdao 266071, Shangdong, Peoples R China;[3]Univ Wisconsin, Dept Food Sci, 1605 Linden Dr, Madison, WI 53706 USA;[4]Guangdong Ocean Univ, Coll Fisheries, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China

年份：2016

卷号：454

起止页码：140

外文期刊名：AQUACULTURE

收录：SCI-EXPANDED(收录号：WOS:000368690000017)、、Scopus(收录号：2-s2.0-84951987503)、WOS

基金：This work was supported by National Natural Science Foundation of China (31172423, 31402309) and Applied Research Program for Post-doctors in Qingdao.

语种：英文

外文关键词：Turbot; Fish protein hydrolysate; Growth performance; Lipid accumulation

外文摘要：A 12-week feeding experiment in indoor flowing seawater system was conducted to investigate the effects of graded levels of dietary fish protein hydrolysate (PH) on growth performance and lipid accumulation of juvenile turbot (Scophthalmus maximus) (initial body weight 4.16 +/- 0.01 g). Pour isonitrogcnous and isoenergetic experimental diets with high plant protein were formulated to contain graded levels of FPH, meanwhile the fish meal was replaced correspondingly by 0% (Diet FPH-0, control), 5% (Diet FPH-5), 10% (Diet FPH-10) and 20% (Diet FPH-20) of total dietary protein, respectively. Quadruplicate groups of 25 fish were fed to apparent satiation twice daily during the feeding trial. The results showed that the specific growth rate (SGR), protein efficiency ratio, and protein retention was not significantly different among group FPH-0, FPH-5, and FPH-10. The highest level of dietary FPH (FPH-20) significantly reduced the SGR but increased the feed intake compared to the control group. The viscerosomatic index in group FPH-10 and FPH-20 were significantly lower than that in the control group. Fish fed FPH-20 also showed significantly lower crude lipid concentration in whole body than fish fed the control diet The concentrations of total and neutral lipid in gut were significantly lower in fish fed FPH-10 compared to the control group. Fur muscle lipid, the polar lipid concentration significantly decreased while the neutral lipid concentration significantly increased with increasing levels of dietary FPH, but no significant difference in total lipid concentration was observed among experimental groups. The lipid concentrations in liver were not significantly different among dietary treatments. With increasing levels of dietary FPH, serum triacylglycerol and cholesterol concentrations significantly decreased. The influence of dietary FPH on tissue fatty acid compositions generally corresponded with that on tissue lipid concentrations. In conclusion, these results suggested that in high plant protein diets FPH replacing fish meal by 10% of total dietary protein did not compromise the growth of juvenile turbot. However, a higher FPH level (replacing fish meal by 20% of total dietary protein) reduced the growth and feed utilization but it increased the feed intake. In the present experimental conditions, the FPH treatments, especially at high levels, significantly modulated the lipid accumulation and fatty acid compositions in turbot tissues, in a dose- and tissue-dependent manner. Statement of Relevance: This study provided useful data for the circulatory use of fish processing by-products in fish diets. Also, based on the results of lipid analysis in fish tissues, potential lipid manipulating feed additives could be explored from fish protein hydrolysates. (C) 2015 Elsevier B.V. All rights reserved.