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ORIGINAL RESEARCH article

Front. Mar. Sci.
Sec. Aquatic Physiology
Volume 11 - 2024 | doi: 10.3389/fmars.2024.1432379
This article is part of the Research Topic Nutritional Metabolism and Immunity of Aquatic Animals View all articles

Effects of dietary Silphium perfoliatum L. on the growth performance, immunity, intestinal health, and resistance against Nocardia seriolae of largemouth bass (Micropterus salmoides)

Provisionally accepted
Hao Tang Hao Tang 1Sheng Luo Sheng Luo 1Jifeng Chen Jifeng Chen 2Qianjin Zhou Qianjin Zhou 1Guanjun Yang Guanjun Yang 1Jianfei Lu Jianfei Lu 1*Jiong Chen Jiong Chen 1
  • 1 Ningbo University, Ningbo, Zhejiang Province, China
  • 2 Nanjing Silphium Biotechnology Company Limited, Nanjing, Liaoning Province, China

The final, formatted version of the article will be published soon.

    The present study was conducted to evaluate the effect of dietary Silphium perfoliatum L. on growth performance, immunity, intestinal health, and resistance against Nocardia seriolae of largemouth bass. Four dietary concentrations of S. perfoliatum L. were prepared: 0% (SPL0), 1% (SPL1), 2.5% (SPL2.5), and 5% (SPL5). After 60 d feeding, a challenge test was conducted by injecting N. seriolae intraperitoneally. The results showed that supplementing the diets with S. perfoliatum L. could promote the weight gain rate, specific growth rate, and feed intake. Meantime, S. perfoliatum L. could also enhance the activity of immune-related enzymes and improve the expression of immune-related genes in the liver. Compared to the control group, S. perfoliatum L. improved intestinal morphology and reduced the abundance of harmful bacteria in intestinal microbiota. Importantly, supplementing the diets with S. perfoliatum L. protected largemouth bass from N. seriolae infection, resulting in a relative percent survival (RPS) of 24% (SPL1), 31.99% (SPL2.5), and 43.99% (SPL5). In conclusion, the present study showed that S. perfoliatum L. could boost growth performance, enhance immunity, promote intestinal health, and improve the ability of largemouth bass against N. seriolae infection.

    Keywords: Largemouth bass, Silphium perfoliatum L., Immunity, intestinal microbiota, Disease Resistance

    Received: 14 May 2024; Accepted: 05 Jul 2024.

    Copyright: © 2024 Tang, Luo, Chen, Zhou, Yang, Lu and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Jianfei Lu, Ningbo University, Ningbo, 315211, Zhejiang Province, China

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