Economically viable bioprocess for inclusion of microalga Nannochloropsis gaditana in aquaculture feeds: Evaluation of antioxidant addition in preventing lipid oxidation during storage

The rising prices of fishery derivatives limits their use in aquafeeds. Therefore, other alternatives are used to replace those ingredients. Among them, microalgae are of great interest both as an ingredient and as a potential stabilising agent against lipid oxidation. This study evaluates on the use of Nannochloropsis gaditana to prevent lipid oxidation in a set of 12 aquafeeds over 540 days of storage. Aquafeeds were formulated with/without 15 % N. gaditana combined with two antioxidants -butylhydroxytoluene (25-150 mg·kg