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ORIGINAL RESEARCH article

Front. Mar. Sci.
Sec. Marine Fisheries, Aquaculture and Living Resources
Volume 12 - 2025 | doi: 10.3389/fmars.2025.1525330
This article is part of the Research Topic Beneficial Effects of Microorganisms and Their Metabolites, Including Probiotics, Fungi and Microalgae, on the Growth and Physiological Health of Aquatic Animals View all 3 articles

Growth performance, intestinal health, and non-specific immunity were significantly affected by feeding different compound lactic acid bacteria supplementation in sea urchin (Strongylocentrotus intermedius)

Provisionally accepted
Yuntian Zhang Yuntian Zhang Rongwei Zhang Rongwei Zhang Yi Chen Yi Chen Zhixu Guo Zhixu Guo Xiangyu Meng Xiangyu Meng Yuzhe Han Yuzhe Han Xiaoran Zhao Xiaoran Zhao Tongjun Ren Tongjun Ren *
  • Dalian Ocean University, Dalian, China

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

    A 50-day feeding trial was conducted to evaluate the effects of dietary supplementation with different levels of compound lactic acid bacteria on the growth performance, antioxidant capacity, intestinal microbiota composition, and immunity of the Strongylocentrotus intermedius. In this study, S. intermedius with an initial body weight of 26.47 ± 0.27 g was used as the experimental subject. Based on dietary supplementation with compound lactic acid bacteria (containing 56.15% Lentilactobacillus and 20.59% Acetobacter) at different levels, the subjects were categorized into four experimental groups: 0% (RC), 0.5% (RL), 1% (RM), and 2% (RH). The dietary supplementation with compound lactic acid bacteria significantly improved the growth performance of S. intermedius in the RL, RM, and RH groups, including final body weight (FBW), weight gain rate (WGR), specific growth rate (SGR), and gonadosomatic index (GSI). Furthermore, antioxidant and immune indicators such as total antioxidant capacity (T-AOC), superoxide dismutase (SOD), catalase (CAT), acid phosphatase (ACP), alkaline phosphatase (AKP), and lysozyme (LZM) were significantly enhanced. Notably, compound lactic acid bacteria improved digestive enzyme activities in the intestine and reduced the feed conversion ratio (FCR). Supplementation with compound lactic acid bacteria reduced Arcobacter and Vibrio colonization in the intestinal tract and enhanced the expression of genes related to antioxidant, stress, and immune responses in the RM and RH groups. Overall, 1% compound lactic acid bacteria supplementation in the diet significantly improved growth performance, digestive capacity, non-specific immune ability, and intestinal microbial stability in S. intermedius.

    Keywords: echinoid, Strongylocentrotus intermedius, Probiotics, intestinal microbiota, Immunity

    Received: 09 Nov 2024; Accepted: 03 Jan 2025.

    Copyright: © 2025 Zhang, Zhang, Chen, Guo, Meng, Han, Zhao and Ren. 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: Tongjun Ren, Dalian Ocean University, Dalian, China

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