A new sustainable formulated feed based on discards from food industries for rearing the sea urchin Paracentrotus lividus (Lmk)

Autor: Giulia Visconti, Salvatore Romano, Geraldina Signa, Antonio Mazzola, Salvatrice Vizzini
Přispěvatelé: Salvatrice Vizzini, Giulia Visconti, Geraldina Signa, Salvatore Romano, Antonio Mazzola
Rok vydání: 2019
Předmět:
Zdroj: Aquaculture Nutrition. 25:691-701
ISSN: 1365-2095
1353-5773
DOI: 10.1111/anu.12890
Popis: 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.
Databáze: OpenAIRE
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