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Mar. Drugs 2015, 13(5), 2680-2693;

Employment of Marine Polysaccharides to Manufacture Functional Biocomposites for Aquaculture Feeding Applications

Istituto di Scienze dell'Alimentazione—CNR Via Roma 52, 83100 Avellino, Italy
Department of Science and Technologies, University of Sannio, Via Port'Arsa, 11, 82100 Benevento, Italy
Author to whom correspondence should be addressed.
Academic Editor: Paola Laurienzo
Received: 3 March 2015 / Revised: 17 April 2015 / Accepted: 17 April 2015 / Published: 29 April 2015
(This article belongs to the Collection Marine Polysaccharides)
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In this study, polysaccharides of marine origin (agar, alginate and κ-carrageenan) were used to embed nutrients to fabricate biocomposites to be employed in animal feeding. The consistency of biocomposites in water has been evaluated up to 14 days, by several methods: swelling, nutrient release and granulometric analysis. Biocomposites were produced with varying percentages of nutrients (5%–25%) and polysaccharides (1%–2%–3%). All possible biopolymer combinations were tested in order to select those with the best network strength. The best performing biocomposites were those manufactured with agar 2% and nutrients 10%, showing the lowest percentage of water absorption and nutrient release. Biocomposites made of agar 2% and nutrients 10% were the most stable in water and were therefore used to analyze their behavior in water with respect to the release of quercetin, a phenolic compound with demonstrated high antibacterial and antioxidant activities. The leaching of such molecules in water was therefore employed as a further indicator of biocomposite water stability. Altogether, our results confirm the suitability of agar as a binder for biocomposites and provide a positive contribution to aquaculture. View Full-Text
Keywords: functional biocomposites; quercetin release; aquaculture applications; welfare fish functional biocomposites; quercetin release; aquaculture applications; welfare fish

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Paolucci, M.; Fasulo, G.; Volpe, M.G. Employment of Marine Polysaccharides to Manufacture Functional Biocomposites for Aquaculture Feeding Applications. Mar. Drugs 2015, 13, 2680-2693.

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