During a 18‐week experiment in a sea‐based system, Paracentrotus lividus was fedwith two formulations of a new sustainable feed whose main ingredients were foodfarming discards, mostly outermost lettuce leaves, in different percentage. Egg whitewas added as protein source and binder, and a little amount of commercial fish feedwas 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%) andgonad index expressed as size‐adjusted gonad weight (288%) were recorded. Gonadsachieved 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 productquality, in terms of gonad features (gonad index and colour) and content of essentialfatty 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 ingredientssuch as food farming discards.
|Numero di pagine||11|
|Stato di pubblicazione||Published - 2019|
All Science Journal Classification (ASJC) codes