Effects of Fish Meal Replacement with Poultry By-Product Meal on Growth Performance, Lipid Metabolism, Hepatic–Intestinal Health and Ammonia Nitrogen Stress in <i>Siniperca chuatsi</i>

Effects of Fish Meal Replacement with Poultry By-Product Meal on Growth Performance, Lipid Metabolism, Hepatic–Intestinal Health and Ammonia Nitrogen Stress in <i>Siniperca chuatsi</i>

Fish meal (FM) replacement is essential for sustainable aquaculture development. This study investigated the effects of FM replacement with poultry by-product meal (PBM) on growth performance, hepatic and intestinal health and ammonia nitrogen stress resistance in mandarin fish (<i>Siniperca c...

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Bibliographic Details
Main Authors: Shulin Tang, Huanchao Ma, Xueming Hua, Lei Wang, Biao Yun, Xuan Zhu, Xueqiao Qian
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Fishes
Subjects:
<i>Siniperca chuatsi</i>
poultry by-product meal
liver lipid accumulation
β-oxidation inhibition
antioxidant capacity
intestinal health
Online Access:https://www.mdpi.com/2410-3888/10/2/78
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Summary:Fish meal (FM) replacement is essential for sustainable aquaculture development. This study investigated the effects of FM replacement with poultry by-product meal (PBM) on growth performance, hepatic and intestinal health and ammonia nitrogen stress resistance in mandarin fish (<i>Siniperca chuatsi</i>). A 52-day feeding trial was conducted using PBM to replace fish meal at levels of 0%, 17.5%, 35.0%, 52.5% and 70.0%. The results showed that FM replacement with PBM did not influence growth performance in mandarin fish. Moderate PBM replacement (≤35.0%) did not harm liver health and enhanced the intestinal structure. However, excessive replacement (≥52.5%) caused hepatocyte damage, reduced antioxidant capacity and decreased survival under ammonia nitrogen stress. Notably, 70% PBM replacement led to severe hepatic lipid accumulation, inhibiting fatty acid β-oxidation and triglyceride hydrolysis pathways. Furthermore, high PBM levels (≥52.5%) also reduced intestinal muscularis thickness, downregulated tight junction proteins and induced inflammation. In conclusion, while PBM replacement does not hinder growth, maintaining levels below 35.0% (PBM ≤ 28.5%) is essential for preserving hepatic lipid metabolism, intestinal health and antioxidant defense in mandarin fish.
ISSN:2410-3888

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