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Response of gut microbiota, antioxidation, and disease resistance to Pacific shrimp fed distiller’s dried grains with solubles replaced soybean meal

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Abstract

This experiment aimed to examine the potential of distiller’s dried grains with solubles (DDGS) meal as a substitute for soybean meal (SBM) in the Pacific shrimp diet. The study aimed to investigate how DDGS affected disease resistance, antioxidation, and gut microbiota. Eight hundred forty shrimp were given varied diets with varying concentrations of DDGS. D1 (0%), D2 (2%), D3 (4%), D4 (6%), D5 (8%), D6 (10%), and D7 (12%) were the DDGS levels. Each group had three replicates of the 56-day experiment. Initially, the weight was 0.19 ± 0.00 g. The survival rate was consistently 100% for shrimp-fed DDGS, except for group 7 (12%) and the control group, where shrimp mortality was observed. The total protein (TP) content was improved as the inclusion level of DDGS increased. The glucose (GLU) exhibited a downward trend with higher DDGS inclusion. Similarly, the TG and CHO levels in the serum decreased as the DDGS levels increased. The activities of ALT (alanine transaminase) and AST (aspartate aminotransferase) decreased as the dietary DDGS increased, with the control group showing significantly higher ALT and AST activities than those fed DDGS diets (P < 0.05). Furthermore, the SOD (superoxide dismutase) activity significantly increased with higher DDGS levels, while the MDA (malondialdehyde) activity showed the opposite trend. Notably, the control exhibited the highest MDA activity value. The most prevalent phyla found in the gut microbiota were Proteobacteria and Bacteroidetes. Upon completion of a 7-day bacteria challenge, it was observed that shrimp fed with the control diet had the highest mortality rate compared to those fed with the DDGS diet. Based on the parameters measured in this study, it was determined that replacing 10% of SBM with DDGS in the feed of Pacific shrimp is feasible.

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Data is provided within the manuscript.

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Acknowledgements

We are grateful to all of our lab colleagues for their tremendous support. We appreciate the technical assistance the Ministry of Agriculture provides in South China’s Key Laboratory of Aquatic, Livestock, and Poultry Feed Science and Technology.

Funding

The National Natural Science Foundation of China (31802316), the Guangdong Science and Technology Specialist Project (GDKTP2021048400), and the National Key R&D Program (2019YFD0900200) all provide support for the Special Fund Project.

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Contributions

MAY was responsible for the experiment’s design, execution, and manuscript writing. GWR, KS, BT, JW, MM, ZG, and LF edited the manuscript; YQ supplied the materials, equipment, and reagents.

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Correspondence to Yang Qihui.

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The authors declare no competing interests.

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Yohana, M.A., Ray, G.W., Qihui, Y. et al. Response of gut microbiota, antioxidation, and disease resistance to Pacific shrimp fed distiller’s dried grains with solubles replaced soybean meal. Aquacult Int (2024). https://doi.org/10.1007/s10499-024-01529-w

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  • DOI: https://doi.org/10.1007/s10499-024-01529-w

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