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

IF 2.8 2区生物学 Q1 MARINE & FRESHWATER BIOLOGY

Frontiers in Marine Science Pub Date : 2025-01-20 DOI:10.3389/fmars.2025.1525330

Yuntian Zhang, Rongwei Zhang, Yi Chen, Zhixu Guo, Xiangyu Meng, Yuzhe Han, Xiaoran Zhao, Tongjun Ren

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Abstract

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.

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饲喂不同复合乳酸菌对海胆生长性能、肠道健康和非特异性免疫有显著影响

本试验旨在评价饲粮中添加不同水平的复合乳酸菌对中间圆梭菌生长性能、抗氧化能力、肠道菌群组成和免疫力的影响。本研究以初始体重为26.47±0.27 g的中间棘球藻为实验对象。根据饲粮中添加不同水平的复合乳酸菌（含56.15%的慢乳杆菌和20.59%的醋酸杆菌），将试验对象分为0% （RC）、0.5% （RL）、1% （RM）和2% (RH) 4个试验组。饲粮中添加复合乳酸菌显著提高了RL、RM和RH组中间梭菌的生长性能，包括末重（FBW）、增重率（WGR）、特定生长率（SGR）和促性腺指数（GSI）。总抗氧化能力（T-AOC）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、酸性磷酸酶（ACP）、碱性磷酸酶（AKP）和溶菌酶（LZM）等抗氧化和免疫指标均显著提高。复合乳酸菌显著提高了肠道消化酶活性，降低了饲料系数。在RM组和RH组中，添加复合乳酸菌减少了肠道中Arcobacter和Vibrio的定植，并增强了与抗氧化、应激和免疫反应相关的基因的表达。总体而言，饲粮中添加1%复合乳酸菌可显著提高中间链球菌的生长性能、消化能力、非特异性免疫能力和肠道微生物稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Marine Science Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.10

自引率

16.20%

发文量

2443

审稿时长

14 weeks

期刊介绍： Frontiers in Marine Science publishes rigorously peer-reviewed research that advances our understanding of all aspects of the environment, biology, ecosystem functioning and human interactions with the oceans. Field Chief Editor Carlos M. Duarte at King Abdullah University of Science and Technology Thuwal is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, policy makers and the public worldwide. With the human population predicted to reach 9 billion people by 2050, it is clear that traditional land resources will not suffice to meet the demand for food or energy, required to support high-quality livelihoods. As a result, the oceans are emerging as a source of untapped assets, with new innovative industries, such as aquaculture, marine biotechnology, marine energy and deep-sea mining growing rapidly under a new era characterized by rapid growth of a blue, ocean-based economy. The sustainability of the blue economy is closely dependent on our knowledge about how to mitigate the impacts of the multiple pressures on the ocean ecosystem associated with the increased scale and diversification of industry operations in the ocean and global human pressures on the environment. Therefore, Frontiers in Marine Science particularly welcomes the communication of research outcomes addressing ocean-based solutions for the emerging challenges, including improved forecasting and observational capacities, understanding biodiversity and ecosystem problems, locally and globally, effective management strategies to maintain ocean health, and an improved capacity to sustainably derive resources from the oceans.