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Selenized non-Saccharomyces yeasts and their potential use in fish feed

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Abstract

Selenium (Se) is a vital trace element, essential for growth and other biological functions in fish. Its significance lies in its role as a fundamental component of selenoproteins, which are crucial for optimal functioning of the organism. The inclusion of Se in the diets of farmed animals, including fish, has proved invaluable in mitigating the challenges arising from elemental deficiencies experienced in captivity conditions due to limitations in the content of fishmeal. Supplementing diets with Se enhances physiological responses, particularly mitigates the effects of the continuous presence of environmental stress factors. Organic Se has been shown to have higher absorption rates and a greater impact on bioavailability and overall health than inorganic forms. A characteristic feature of yeasts is their rapid proliferation and growth, marked by efficient mineral assimilation. Most of the selenized yeasts currently available in the market, and used predominantly in animal production and aquaculture, are based on Saccharomyces cerevisiae, which contains selenomethionine (Se-Met). The object of this review is to highlight the importance of selenized yeasts. In addition, it presents metabolic and productive aspects of other yeast genera that are important potential sources of organic selenium. Some yeast strains discussed produce metabolites of interest such as lipids, pigments, and amino acids, which could have applications in aquaculture and further enrich their usefulness.

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All data related to this study are included in the manuscript.

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Funding

This research was financially supported by the Agencia Nacional de Investigación y Desarrollo ANID/Fondecyt postdoctoral project 3210499.

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Conceptualization by P. D. N. and P. D.; validation by P. D. N. and A. S. A.; formal analysis by P. D. N., A. S. A., D. C. G., P. D., D. H., and R.S.; writing—original draft preparation by P. D. N., A. S. A., D. C. G., P. D., and D. H.; writing—review and editing, P. D. N., A. S. A., and D. C. G.; visualization, D. C. G. and D. H.; supervision by P. D. N. and A. S. A. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Paola Díaz-Navarrete or Alberto Sáez-Arteaga.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Díaz-Navarrete, P., Dantagnan, P., Henriquez, D. et al. Selenized non-Saccharomyces yeasts and their potential use in fish feed. Fish Physiol Biochem (2024). https://doi.org/10.1007/s10695-024-01340-7

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