Fish microbiome modulation and convenient storage of aquafeeds when supplemented with Vitamin K1

Acosta, Marcos; Quiroz, Eduardo; Tovar-Ramírez, Dariel; Roberto, Vania Palma; Dias, Jorge; Gavaia, Paulo; Fernández, Ignacio

http://hdl.handle.net/10400.1/18626

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Authors

Acosta, Marcos

Quiroz, Eduardo

Tovar-Ramírez, Dariel

Abstract(s)

Vitamin K (VK), and particularly phylloquinone (VK1), is an essential micronutrient whose stability in aquafeeds has not been extensively evaluated. Losing stability can lead to nutritional deficiency, which is known to hamper fish development and physiology. Gut microbiota also plays a key role in host health through the interaction with several biological processes. The present study evaluated the best storing conditions of aquafeeds when supplemented in VK1 and intestinal microbiota modulation in Senegalese sole (Solea senegalensis) juveniles. Aquafeeds with a high level of VK1 supplementation required storage at −20 ◦C for short-term (up to 7 days) and at −80 ◦C for long-term (up to three months) to ensure optimal preservation. Furthermore, gut bacterial communities of Senegalese sole specimens fed with a commercial feed supplemented with VK1 showed a better-balanced population of microorganisms in the intestine, which might improve Senegalese sole health during the ongrowing phase. These results provide the practical guidelines for the proper storing of aquafeeds in the industry when supplemented with VK1 and highlight the potential benefits of dietary VK1 supplementation for a balanced intestinal microbiota and overall fish health.