Appetite Regulation, Growth Performances and Fish Quality Are Modulated by Alternative Dietary Protein Ingredients in Gilthead Sea Bream (<i>Sparus aurata</i>) Culture
Lina Fernanda Pulido-Rodriguez,
Gloriana Cardinaletti,
Giulia Secci,
Basilio Randazzo,
Leonardo Bruni,
Roberto Cerri,
Ike Olivotto,
Emilio Tibaldi,
Giuliana Parisi
Affiliations
Lina Fernanda Pulido-Rodriguez
Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, 50144 Firenze, Italy
Gloriana Cardinaletti
Department of Agricultural, Food, Environmental and Animal Science, University of Udine, 33100 Udine, Italy
Giulia Secci
Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, 50144 Firenze, Italy
Basilio Randazzo
Department of Life and Environmental Sciences, Polytechnic University of Marche, 60131 Ancona, Italy
Leonardo Bruni
Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, 50144 Firenze, Italy
Roberto Cerri
Department of Agricultural, Food, Environmental and Animal Science, University of Udine, 33100 Udine, Italy
Ike Olivotto
Department of Life and Environmental Sciences, Polytechnic University of Marche, 60131 Ancona, Italy
Emilio Tibaldi
Department of Agricultural, Food, Environmental and Animal Science, University of Udine, 33100 Udine, Italy
Giuliana Parisi
Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, 50144 Firenze, Italy
By answering the need for increasing sustainability in aquaculture, the present study aimed to compare growth, gene expression involved in appetite regulation, physical characteristics, and chemical composition of Sparus aurata fed alternative protein sources. Fish were fed ten iso-proteic, iso-lipidic, and isoenergetic diets: a vegetable-based (CV) and a marine ingredient-rich (CF) diet were set as control diets. The others were prepared by replacing graded levels (10, 20 or 40%) of the vegetable proteins in the CV with proteins from a commercial defatted Hermetia illucens pupae meal (H), poultry by-product meal (PBM) singly (H10, H20, H40, P20, P40) or in combination (H10P30), red swamp crayfish meal (RC10) and from a blend (2:1, w:w) of Tisochrysis lutea and Tetraselmis suecica (MA10) dried biomasses. The increase in ghre gene expression observed in MA10 fed fish matched with increased feed intake and increased feed conversion ratio. Besides, the MA10 diet conferred a lighter aspect to the fish skin (p Sparus aurata.
