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Feed Additives Based on N. gaditana and A. platensis Blend Improve Quality Parameters of Aquacultured Gilthead Seabream (Sparus aurata) Fresh Fillets

Authors :
María Isabel Sáez
Alba Galafat
Silvana Teresa Tapia Paniagua
Juan Antonio Martos-Sitcha
Francisco Javier Alarcón-López
Tomás Francisco Martínez Moya
Source :
Fishes, Vol 9, Iss 6, p 205 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The aim of this research is to explore the potential effects of two microalgae-based additives included in finishing feeds on the quality and shelf-life of seabream fillets. In a 41-day feeding trial, seabream specimens were fed with experimental aquafeeds containing 10% of the bioactive supplements. These additives consisted of a blend of Nannochloropsis gaditana and Arthrospira platensis biomass, which was utilized as either raw (LB-CB) or enzymatically hydrolyzed (LB-CBplus). A control group received a microalgae-free diet. The results showed that the functional aquafeeds improved the nutritional profile of seabream fillets, increasing protein and PUFA-n3 contents while reducing the atherogenic index, especially for the LB-CBplus treatment. LB-CBplus also enhanced the texture parameters (hardness and chewiness) of fillets during the initial 5 days under cold storage. Regarding skin pigmentation, fillets showed increased greenish and yellowish coloration compared to control fish, mostly attributed to the inclusion of crude algal biomass (LB-CB). Moreover, diets enriched with microalgae additives effectively delayed muscle lipid oxidation processes under refrigeration for up to 12 days, with LB-CBplus exhibiting higher antioxidant effects. These findings highlight the potential of microalgae-based additives to enhance both the nutritional and organoleptic quality of seabream fillets.

Details

Language :
English
ISSN :
24103888
Volume :
9
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Fishes
Publication Type :
Academic Journal
Accession number :
edsdoj.1706f32aaa844c578c4f28e13cc2d0f0
Document Type :
article
Full Text :
https://doi.org/10.3390/fishes9060205