文献类型：期刊文献

英文题名：Study of the requirements of dietary cholesterol at two different growth stages of Pacific white shrimps, Litopenaeus vannamei

作者：Zhang, Wei[1,2];Yang, Qihui[1,2];Tan, Beiping[1,2];Wang, Fengmei[1,3];Dong, Xiaohui[1,2];Chi, Shuyan[1,2];Liu, Hongyu[1,2];Zhang, Shuang[1,2];Wang, Hualang[2]

机构：[1]Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Anim Nutr & Feed, Zhanjiang, Peoples R China;[2]Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Tech, Zhanjiang, Peoples R China;[3]Aohua Aquat Feed Co Ltd, Zhanjiang, Peoples R China

年份：2019

卷号：27

期号：6

起止页码：1583

外文期刊名：AQUACULTURE INTERNATIONAL

收录：SCI-EXPANDED(收录号：WOS:000495395200001)、、WOS

基金：This work was supported by the National Natural Science Foundation of China, Grant/Award Number: 31802316; Special Fund for Agro-scientific Research in the Public Interest of China, Grant/Award Number: 201003020; Guangdong Nature Science Foundation of China, Grant/Award Number: 2015A030313621, 2016A030313749; and Industry Technology and Development Special Fund Project of Guangdong Province, Grant/Award Number: 2013B021100017.

语种：英文

外文关键词：Litopenaeus vannamei; Cholesterol; Growth performance; Body composition; Phytosterol substitution

外文摘要：Two 8-week feeding experiments were conducted to investigate the cholesterol requirements of Litopenaeus vannamei at two different growth stages-with initial body weights of 0.61 +/- 0.00 g (juvenile) and 4.25 +/- 0.00 g (subadult). Six diets containing cholesterol (C) 0.03% (FM-fish meal), 0.09% (0.05% C), 0.14% (0.1% C), 0.27% (0.2% C), 0.47% (0.4% C), and 0.90% (0.8% C) were prepared with red fish meal, dehulled soybean meal and peanut meal as the protein source, and fish oil as the fat source. Two levels of phytosterol (P) substitutes-0.05% (0.05% P) and 0.8% (0.8% P)-for dietary cholesterol were evaluated. Results showed dietary cholesterol levels had significant effects on the weight gain rate (WGR), specific growth rate (SGR), and feed conversion ratio (FCR) of juveniles (P < 0.05). Crude fat in the 0.05% C and 0.1% C groups of subadults was significantly higher than that in the FM group (P < 0.05). The contents of CHOL, HDL, LDL, and liver CHOL were significantly associated with the content of cholesterol (P < 0.05). The dietary cholesterol proportion significantly affected serum AST and ALT (P < 0.05). Phytosterol supplementation presented growth-promoting effects for juvenile L. vannamei. A broken-line equation for weight growth showed the optimum dietary cholesterol requirement was 0.16% for L. vannamei juveniles (0.61 +/- 0.00 g), and no extra dietary cholesterol supplementation was needed for L. vannamei subadults (4.25 +/- 0.00 g).