Metabolomic Applications in Aquaculture Immunity

Metabolomics has emerged as a powerful approach to characterise small-molecule profiles within aquaculture species, illuminating the metabolic underpinnings of immune defences against bacterial, viral and parasitic challenges. By integrating mass spectrometry-based profiling with targeted interventions, researchers are unravelling how specific metabolites modulate innate immunity, promote pathogen clearance and enhance resilience in fish and shellfish. Applications span identification of immunostimulatory fatty acids and amino acids that prime macrophage function and phagocytosis, to the mapping of central carbon pathways whose reconfiguration dictates inflammatory and antioxidant responses. Such insights are driving the development of metabolic modulators as feed additives and water treatments to reduce reliance on antibiotics, mitigate disease outbreaks and improve sustainability across global aquaculture systems.

Research from Nature Portfolio

Studies on hybrid grouper have demonstrated that dietary supplementation with oleic acid markedly alters the splenic and hepatic metabolomic landscape following Vibrio vulnificus challenge, enriching amino-acid pathways related to glycine, serine, threonine and glutamate metabolism. Fish receiving an oleic-acid-enriched diet exhibited elevated levels of protective metabolites and improved survival, highlighting its role as an immunostimulant in feed formulations. In parallel, comparative metabolomic analysis of Mandarin fish reared in recirculating aquaculture systems versus traditional pond culture has revealed shifts in fatty-acid biosynthesis, lysosomal function and tryptophan pathways. These environment-driven metabolic profiles inform how system design influences immune readiness, suggesting that optimised recirculation can enhance host defence through modulation of key metabolites.

Metabolomic Applications in Aquaculture Immunity publication trend

The graph below shows the total number of articles in metabolomic applications in aquaculture immunity across all publications each year (not limited to Nature Index journals).

Technical terms

Metabolomics: The comprehensive analysis of metabolites in biological samples to understand cellular processes.

Immunostimulant: A compound administered to enhance the innate or adaptive immune response.

TCA cycle: The tricarboxylic acid cycle, a central metabolic pathway that provides energy and biosynthetic precursors.

Phagocytosis: The cellular process by which immune cells engulf and degrade pathogens.

Biomarker: A measurable molecule that indicates a biological state or response.

GC–MS: Gas chromatography–mass spectrometry, an analytical technique for identifying and quantifying metabolites.

References

1. Aspartate metabolic flux promotes nitric oxide to eliminate both antibiotic-sensitive and -resistant Edwardsiella tarda in zebrafish. Frontiers in Immunology (2023).
2. Oleic acid as potential immunostimulant in metabolism pathways of hybrid grouper fingerlings (Epinephelus fuscoguttatus × Epinephelus lanceolatus) infected with Vibrio vulnificus. Scientific Reports (2023).
3. GC-MS metabolomics reveals metabolic differences of the farmed Mandarin fish Siniperca chuatsi in recirculating ponds aquaculture system and pond. Scientific Reports (2020).
4. Succinate Promotes Phagocytosis of Monocytes/Macrophages in Teleost Fish. Frontiers in Molecular Biosciences (2021).
5. Maltose promotes crucian carp survival against Aeromonas sobrial infection at high temperature. Virulence (2020).