Probiotics are increasingly considered as an alternative to antibiotics in developing environmentally sustainable aquaculture practices. Hybrid sturgeon (Acipenser baerii ♀ × Acipenser schrenckii ♂), a globally popular species valued for its nutritional content and caviar, has limited research on host-associated probiotics. In this study, we isolated and identified Bacillus subtilis and Bacillus amyloliquefaciens from healthy hybrid sturgeon and assessed their impact on growth, immunity, gut microbiota, and transcriptome following an 8-week feeding trial. The isolated strains demonstrated strong production of protease, amylase, lipase, and cellulase, along with broad-spectrum pathogen inhibition, including Aeromonas veronii, Aeromonas sobria, and Yersinia ruckeri. Supplementation with B. subtilis and B. amyloliquefaciens significantly improved growth performance and increased survival rates against A. veronii infection. Mechanistically, probiotics altered gut microbiota composition, enhancing digestive functions. Transcriptome analysis further revealed that probiotic supplementation boosted immune response and protein digestion and absorption. These findings suggest that B. subtilis and B. amyloliquefaciens are promising probiotic candidates for the hybrid sturgeon industry, offering effective protection against A. veronii infection.
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Isolation, characterization of Bacillus subtilis and Bacillus amyloliquefaciens and validation of the potential probiotic efficacy on growth, immunity, and gut microbiota in hybrid sturgeon (Acipenser baerii ♀ × Acipenser schrenckii ♂).
Fish Shellfish Immunol
December 2024
Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, College of Fisheries, Southwest University, Chongqing, China. Electronic address:
Probiotics are increasingly considered as an alternative to antibiotics in developing environmentally sustainable aquaculture practices. Hybrid sturgeon (Acipenser baerii ♀ × Acipenser schrenckii ♂), a globally popular species valued for its nutritional content and caviar, has limited research on host-associated probiotics. In this study, we isolated and identified Bacillus subtilis and Bacillus amyloliquefaciens from healthy hybrid sturgeon and assessed their impact on growth, immunity, gut microbiota, and transcriptome following an 8-week feeding trial.
View Article and Find Full Text PDFNatural infection of hybrid sturgeon (♀×♂) with and white sturgeon iridovirus: pathological and transcriptomic analyses.
Front Immunol
December 2024
Fisheries Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, China.
Introduction: In August 2023, hybrid sturgeons () cultured in Sichuan, China, showed infectious disease symptoms, including ulcers, liver and spleen nodules, and high mortality rates.
Methods: Pathogenic bacteria were isolated from the liver of diseased sturgeons and analyzed for their phenotypic and molecular traits. Furthermore, iridovirus-specific TaqMan real-time PCR (RT-PCR) analyses were conducted.
Effects of chronic cold stress and thermal stress on growth performance, hepatic apoptosis, oxidative stress, immune response and gut microbiota of juvenile hybrid sturgeon (Acipenser baerii ♀ × A. schrenkii ♂).
Fish Shellfish Immunol
December 2024
Laboratory of Aquatic Animal Nutrition and Ecology, College of Life Sciences, Hebei Normal University, Shijiazhuang, 050024, China; Hebei Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology, Shijiazhuang, 050024, China; Hebei Collaborative Innovation Center for Eco-Environment, Shijiazhuang, 050024, China. Electronic address:
The current study was conducted to investigate the effects of chronic cold stress and thermal stress on the growth performance, hepatic oxidative status, immune response, apoptosis and gut microbiota in juvenile hybrid sturgeon. The fish (initial mean weight: 21.4 ± 0.
View Article and Find Full Text PDFNext-Generation Sequencing to Determine Changes in the Intestinal Microbiome of Juvenile Sturgeon Hybrid (♀ × ♂) Resulting from Sodium Butyrate, Β-Glucan and Vitamin Supplementation.
Genes (Basel)
September 2024
Department of Research and Development, Chemprof, Gutkowo 54B, 11-041 Olsztyn, Poland.
Background/objectives: The effect of sodium butyrate (NaB), β-glucan (βG) and vitamins in the diet on gut microbiome, cortisol level, lysozyme activity and growth parameters of juvenile hybrid sturgeon (♀ × ♂) was determined.
Methods: Sturgeon hybrids ( = 144) were divided into three groups with enriched feeding (mg/kg of feed): FQV1 (50 NaB; 20 βG; const. vitamins), FQV2 (150 NaB; 20 βG; const.
Effects of Alkalinity Stress on Amino Acid Metabolism Profiles and Oxidative-Stress-Mediated Apoptosis/Ferroptosis in Hybrid Sturgeon ( ♀ × ♂) Livers.
Int J Mol Sci
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Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
Alkaline water is toxic to cultured aquatic animals that frequently live in pH-neutral freshwater. Overfishing and habitat destruction have contributed to the decline in the wild sturgeon population; consequently, the domestic hybrid sturgeon has become an increasingly important commercial species in China. Hybrid sturgeons are widely cultured in alkaline water, but little is known about the effects of alkalinity stress on hybrid sturgeon liver tissues.
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