This study compared the growth, flesh quality and metabolomics of largemouth bass () fed trash fish and formula feeds. Trash fish (TF), self-made feed (SF) and commercial feed (CF) were prepared with crude protein levels of 172.2 g/kg, 503.5 g/kg and 504.1 g/kg (666.2 g/kg, 547.3 g/kg and 535.1 g/kg based on dry matter), respectively. Then, the three diets were fed to largemouth bass with an initial body weight of 75.0 ± 0.1 g for 12 weeks. SF and CF groups presented significantly lower feed intake (FI), feed conversion ratio (FCR) and higher protein efficiency ratio (PER) than TF group based on dry matter basis without affecting the weight gain ( < 0.05). The yellowness (b*) in dorsal muscle, flesh heat-insoluble collagen and free flavor amino acids contents in SF group were significantly higher ( < 0.05), while drip loss were significantly lower ( < 0.05) than those of TF group. Compared to TF group, SF and CF groups showed significantly higher flesh polyunsaturated fatty acids (PUFAs), n-3 PUFAs and n-6 PUFAs contents, flesh hardness, shear force and muscle fiber density ( < 0.05), and lower flesh total free amino acids, essential amino acids, muscle fiber diameter, intestine villus height and muscular thickness ( < 0.05). The serum total protein, triglyceride and cholesterol levels in SF group were significantly lower than those in TF and CF groups ( < 0.05). In the muscle metabolomics, 177 differential metabolites were detected between SF and TF groups, which mainly enriched in pathways as biosynthesis of amino acid, histidine metabolism, glycine, serine and threonine metabolism, etc. Conclusively, feeding largemouth bass with formula feeds improved flesh fatty acid profile and flesh texture without negative effects on the growth, but the flesh free amino acids contents were lower than the fish fed trash fish.
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http://dx.doi.org/10.3389/fnut.2022.966248 | DOI Listing |
Fish Shellfish Immunol
January 2025
Henan Province Engineering Research Center of Aquatic Animal Disease Control, College of Fisheries, Henan Normal University, Xinxiang 453007, China.
Finding effective alternatives to antibiotics is crucial for sustainable aquaculture. Host-derived probiotics have great potential as a promising alternative to antibiotics for immune regulation and disease control in fish farming. However, limited research exists regarding the application of native probiotics in largemouth bass (Micropterus salmoides).
View Article and Find Full Text PDFJ Anim Sci
January 2025
Laboratory of Aquatic Animal Nutrition and Feed, College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China.
This study was to evaluate the effects of dietary adding of phytosterol (PS) on growth, antioxidant capacity, tissue morphology and gut microbiota of largemouth bass (Micropterus salmoides). A total of 540 largemouth bass (13.75 ± 0.
View Article and Find Full Text PDFFish Shellfish Immunol
January 2025
College of Marine Sciences, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China; Nansha-South China Agricultural University Fishery Research Institute, Guangzhou, 511464, China. Electronic address:
Nuclear factor-κB (NF-κB)/p65, a vital signaling molecule in the NF-κB pathway, participates in diverse physiological functions and host-virus interactions. However, the involvement of NF-κB/p65 in fish virus infection remains poorly understood. In this study, we explored the role of the p65 in virus infection and its impact on IL-18 regulation in largemouth bass (Micropterus salmoides).
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
School of Biology and Biological Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou 510006, China. Electronic address:
With the global population expected to reach 10 billion by the 2050s, the demand for protein will surge, intensifying the need for high protein utilization efficiency. This study investigates the use of protease-enhanced Streptomyces sp. SCUT-3-3940 to degrade soybean meal (SBM) via solid-state fermentation (SSF).
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
National Aquafeed Safety Assessment Center, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China. Electronic address:
Starch is widely used in aquaculture because of its low price and the advantages for processing expanded feed. Largemouth bass are naturally type 2 diabetic and intolerant to dietary carbohydrates. In this study, we found that the phosphorylation of AKT and FoxO1 were down-regulated in the fish suffering from metabolic liver disease (MLD).
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