Journal
FOOD CHEMISTRY
Volume 133, Issue 1, Pages 90-101Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2011.12.077
Keywords
Aquaculture; Cobia; Diet; Fishmeal; NMR; Metabolomics
Funding
- Hollings Marine Laboratory NMR
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Commercial aquaculture feeds rely heavily on fishmeal and fish oil, which can be expensive and ecologically unsustainable. To evaluate the efficacy of reduced fishmeal diets for outgrowth, a dietary study was conducted on the finfish cobia, Rachycentron canadum. NMR-based metabolomic techniques were used to assess the effect of decreasing dietary fishmeal on the health of the cobia. Filtered serum H-1 NMR spectra analysed by principal components analysis (PCA) showed cobia fed reduced fishmeal diets were metabolically different than cobia on control diets. In particular, tyrosine and betaine increased in cobia fed reduced fishmeal diets while glucose decreased, suggesting that these cobia were not receiving the necessary nutritional components required for energy and growth. The formulated control diet contributed to enriched growth and significantly elevated lactate levels suggesting enhanced gut microflora metabolism in response to dietary components. The results show that NMR-based metabolomic analysis is a useful tool in aquaculture studies. Published by Elsevier Ltd.
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