This study evaluated the exploitation of unprocessed agricultural discards inthe form of fresh vegetable leaves as a diet for the sea urchin Paracentrotus lividus throughthe assessment of their effects on gonad yield and quality. A stock of wild-caught P. lividuswas fed on discarded leaves from three different species (Beta vulgaris, Brassica oleracea,and Lactuca sativa) and the macroalga Ulva lactuca for 3 months under controlled conditions.At the beginning and end of the experiment, total and gonad weight were measured,while gonad and diet total carbon (C%), nitrogen (N%), d13C, d15N, carbohydrates,lipids, and proteins were analyzed. The results showed that agricultural discards providedfor the maintenance of gonad index and nutritional value (carbohydrate, lipid, and proteincontent) of initial specimens. L. sativa also improved gonadic color. The results of thisstudy suggest that fresh vegetable discards may be successfully used in the preparation ofmore balanced diets for sea urchin aquaculture. The use of agricultural discards in prepareddiets offers a number of advantages, including an abundant resource, the recycling ofdiscards into new organic matter, and reduced pressure on marine organisms (i.e., macroalgae) in the production of food for cultured organisms.
|Numero di pagine||13|
|Stato di pubblicazione||Published - 2015|
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