Production of marine probiotic bacteria in a cost-effective marine media based on peptones obtained from discarded fish by-products

José Antonio Vázquez*, Ana Durán, Margarita Nogueira, Araceli Menduíña, Joana Antunes, Ana Cristina Freitas, Ana María Gomes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
15 Downloads

Abstract

The industrial production of marine bacteria with probiotic properties is limited by the excessive cost of the culture media adequate for their growth. The present work aimed to study the suitability of 30 marine media formulated with nitrogen sources (fish peptones) from different fish discards and seawater, for the growth of two marine probiotic bacteria (MPB), namely Phaeobacter sp. and Pseudomonas fluorescens. These fish peptones were produced from several discarded fish and by-products (heads, skins, and whole individuals of megrim, mackerel, gurnard, hake, etc.). In all cultivations, no significant differences were found on cell viability when the microorganism grew on commercial or alternative media. In relation to the biomass production, the growth of Phaeobacter sp. on waste media was commonly similar or a 20% lower than observed in the control cultures. For P. fluorescens, various peptones (skin peptones of pouting and blue whiting) showed even higher productive ability than commercial peptones. An initial economical evaluation revealed that low-cost media reduced until 120 times the cost of production of MPB.
Original languageEnglish
Article number1121
Pages (from-to)1-15
Number of pages15
JournalMicroorganisms
Volume8
Issue number8
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Fish discards valorization
  • Fish peptones
  • Logistic equation
  • Low-cost marine media
  • Marine probiotics bacteria production
  • Sustainability

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