Impact of dietary lysine on growth, nutrient utilization, and intestinal health in triploid rainbow trout (Oncorhynchus mykiss) fed low fish meal diets

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports Pub Date : 2024-10-09 DOI:10.1016/j.aqrep.2024.102402

Shuze Zhang , Chang’an Wang , Siyuan Liu , Yaling Wang , Shaoxia Lu , Shicheng Han , Haibo Jiang , Hongbai Liu , Yuhong Yang

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Abstract

Lysine is one of the essential amino acids for fish growth and development. This study investigated the effect of dietary lysine on growth performance, digestion, and intestinal health of triploid rainbow trout (Oncorhynchus mykiss) (initial body weight: 9.00 ± 0.33 g) fed a low fish meal diet (15 %). Five dietary lysine levels (3.66 %, 3.84 %, 4.19 %, 4.32 %, and 4.55 %) were evaluated for 56 days, with three replicates of 30 fish per level. The results showed that the weight gain rate (198.55 %), specific growth rate (1.95), and VSI were maximized when the dietary lysine level was 4.19 %. The 4.19 % lysine group exhibited minimum moisture (66.66 %) and maximum crude protein (15.47 %), with no significant differences in crude lipid and ash contents. Growth factors mTOR and 4EBP-1, on the other hand, had the highest expression in the 4.19 % group, while IGF-1 and S6K1 peaked in the 4.32 % group. The anti-inflammatory factors TGF-β, NF-κB, IL-4, and IL-10 peaked at different levels and then decreased with increasing lysine levels. The pro-inflammatory factor IL-1β, on the other hand, had the lowest expression at the 4.19 % level. Based on quadratic regression analysis of specific growth rate, the lysine requirement of triploid O. mykiss in low fish meal diets was 4.24 %.

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日粮赖氨酸对喂养低鱼粉日粮的三倍体虹鳟鱼（Oncorhynchus mykiss）的生长、营养利用和肠道健康的影响

赖氨酸是鱼类生长发育所必需的氨基酸之一。本研究调查了日粮赖氨酸对低鱼粉日粮（15%）中三倍体虹鳟（Oncorhynchus mykiss）（初始体重：9.00 ± 0.33 g）生长性能、消化和肠道健康的影响。对五个赖氨酸水平（3.66 %、3.84 %、4.19 %、4.32 % 和 4.55 %）的日粮进行了 56 天的评估，每个水平有三个重复，每个重复有 30 条鱼。结果表明，当日粮赖氨酸水平为 4.19 % 时，增重率（198.55 %）、特定生长率（1.95）和 VSI 达到最大值。4.19 %赖氨酸组的水分（66.66 %）最低，粗蛋白（15.47 %）最高，粗脂肪和灰分含量无显著差异。另一方面，生长因子 mTOR 和 4EBP-1 在 4.19 % 组的表达量最高，而 IGF-1 和 S6K1 则在 4.32 % 组达到峰值。抗炎因子 TGF-β、NF-κB、IL-4 和 IL-10 在不同水平达到峰值，然后随着赖氨酸水平的增加而降低。另一方面，促炎因子 IL-1β 的表达量最低，仅为 4.19 %。根据特定生长率的二次回归分析，低鱼粉日粮中三倍体 O. mykiss 对赖氨酸的需求量为 4.24 %。

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来源期刊

Aquaculture Reports Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

5.90

自引率

8.10%

发文量

469

审稿时长

77 days

期刊介绍： Aquaculture Reports will publish original research papers and reviews documenting outstanding science with a regional context and focus, answering the need for high quality information on novel species, systems and regions in emerging areas of aquaculture research and development, such as integrated multi-trophic aquaculture, urban aquaculture, ornamental, unfed aquaculture, offshore aquaculture and others. Papers having industry research as priority and encompassing product development research or current industry practice are encouraged.