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- Title
A new sustainable formulated feed based on discards from food industries for rearing the sea urchin Paracentrotus lividus (Lmk).
- Authors
Vizzini, Salvatrice; Visconti, Giulia; Signa, Geraldina; Romano, Salvatore; Mazzola, Antonio
- Abstract
During a 18‐week experiment in a sea‐based system, Paracentrotus lividus was fed with two formulations of a new sustainable feed whose main ingredients were food farming discards, mostly outermost lettuce leaves, in different percentage. Egg white was added as protein source and binder, and a little amount of commercial fish feed was added as lipid source. At the end of the experiment, a high survival rate (>80%) and an increase in test diameter (22%), total weight (130%), gonad weight (240%) and gonad index expressed as size‐adjusted gonad weight (288%) were recorded. Gonads achieved a good colour and high levels of essential and polyunsaturated fatty acids, hence representing a commercially valuable product. Comparing the two feed formulations, the one with the lower lettuce content (57% vs. 67%) led to the best product quality, in terms of gonad features (gonad index and colour) and content of essential fatty acids. In order to move towards a higher sustainability of the aquaculture sector, this study proposes a low‐cost feed, produced with cheap and sustainable ingredients such as food farming discards.
- Subjects
PARACENTROTUS lividus; SEA urchins; ESSENTIAL fatty acids; LETTUCE; UNSATURATED fatty acids; FOOD industry
- Publication
Aquaculture Nutrition, 2019, Vol 25, Issue 3, p691
- ISSN
1353-5773
- Publication type
Article
- DOI
10.1111/anu.12890