Effect of dietary soybean meal on growth performance, apparent digestibility, intestinal digestive enzyme activity and muscle growth-related gene expression of Litopenaeus vannamei

Frontiers in Marine Science

Marine Science

Huo Li¹  Kai Peng²  Jichen Zhao²  Xiaoying Chen²  Huijie Lu²  Wen Huang³  Yihong Chen⁴  Chaozheng Li⁵ 

[1] Guangdong Provincial Engineering and Technology Research Center, Guangdong Jinyang Biotechnology Co. Ltd., Maoming, China;Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China;Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China;Maoming Branch Center of Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, Maoming, China;School of Life Science, South China Normal University, Guangzhou, China;State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and the Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-Sen University, Guangzhou, China;Maoming Branch Center of Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, Maoming, China;

关键词: fishmeal;    soybean meal;    growth;    digestion;    muscle growth;    Litopenaeus vannamei;   

DOI  :  10.3389/fmars.2022.945417

 received in 2022-05-16, accepted in 2022-07-21,  发布年份 2022

来源: Frontiers

【 摘 要 】

Soybean meal is one of the major components of aquatic animal diets, whereas little information is available about the evaluation of soybean meal growth suppression mode of action. A 42-day feeding trial was performed to assess the effects of dietary soybean meal on growth performance, apparent digestibility, intestinal digestive enzyme activity, and muscle growth–related gene expression of Litopenaeus vannamei. A total of 600 shrimp were randomly distributed into 20 tanks with 30 shrimp per tank and four tanks per group. The soybean meal was added to the diets at the rate of 20% (T20), 28% (T28), 35% (T35), 42% (T42), and 50% (T50), respectively. Shrimp were fed with apparent satiation three times daily. Results indicated that the final body weight, weight gain rate, specific growth rate, feed intake, intestinesomatic index, dressed weight percentage, and the apparent digestibility coefficients of dry matter, crude protein, crude lipid, and ash were linearly decreased (p < 0.05), but feed coefficient was linearly increased (p < 0.05) as dietary soybean meal increased from 20% to 50%. The intestinal trypsin and amylase activities were decreased (p < 0.05) as dietary soybean meal increased from 20% to 50%, and reached significance at the level of 35%, 42%, and 50%. Shrimp fed with T20 had higher (p < 0.05) intestinal lipase activity than those fed with other diets. The mRNA relative expression of growth hormone, myogenic regulatory factor 5, and target of rapamycin was downregulated (p < 0.05) as dietary soybean meal increased from 20% to 50%. To conclude, dietary soybean meal exceeded 28% significantly inhibited growth performance of L. vannamei, mainly due to the negative impact of soybean meal on digestion and feed utilization and also the inhibition on the muscle growth and related gene expressions.

【 授权许可】

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Copyright © 2022 Peng, Chen, Lu, Zhao, Chen, Li, Li and Huang