Growth, Hepatic Enzymatic Activity, and Quality of European Seabass Fed on <i>Hermetia illucens</i> and Poultry By-Product Meal in a Commercial Farm
Lina Fernanda Pulido-Rodriguez,
Leonardo Bruni,
Giulia Secci,
Sara Moutinho,
Helena Peres,
Tommaso Petochi,
Giovanna Marino,
Emilio Tibaldi,
Giuliana Parisi
Affiliations
Lina Fernanda Pulido-Rodriguez
Department of Agriculture Food Environment and Forestry, University of Florence, Via delle Cascine 5, 50144 Firenze, Italy
Leonardo Bruni
Department of Agriculture Food Environment and Forestry, University of Florence, Via delle Cascine 5, 50144 Firenze, Italy
Giulia Secci
Department of Agriculture Food Environment and Forestry, University of Florence, Via delle Cascine 5, 50144 Firenze, Italy
Sara Moutinho
Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
Helena Peres
Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
Tommaso Petochi
Department of Sustainable Aquaculture, Italian National Institute for Environmental Protection and Research (ISPRA), Via Vitaliano Brancati 48, 00144 Roma, Italy
Giovanna Marino
Department of Sustainable Aquaculture, Italian National Institute for Environmental Protection and Research (ISPRA), Via Vitaliano Brancati 48, 00144 Roma, Italy
Emilio Tibaldi
Department of Agri-Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2, 33100 Udine, Italy
Giuliana Parisi
Department of Agriculture Food Environment and Forestry, University of Florence, Via delle Cascine 5, 50144 Firenze, Italy
Protein meals from insects in combination with poultry by-product meal appear to be promising ingredients for replacing conventional proteins in the diets of carnivorous fish. The present study explored the effects on growth performance, hepatic enzymatic activity, and fillet physical and nutritional characteristics during a 66-day feeding trial performed on European seabass. A total of 3000 fish were distributed into three tanks, where the control group was fed with a commercial diet (CG) and a second group was fed in duplicate with the experimental diet (SSH) containing 10% Hermetia illucens larva meal, 30% poultry by-product meal, and <5.5 g/100 g of feed of marine origin proteins. All fish showed good growth performance. Glucose-6-phosphate dehydrogenase, aspartate aminotransferase, and 3-hydroxyacyl-CoA dehydrogenase activities were higher in the SSH group than in the CG group. The fillet fatty acid profile was largely unaffected by diet, except for a few fatty acids. Fish fed the SSH diet had a lower C22:1n-11 content than CG, thus suggesting an increased β-oxidation. The oxidative status of muscle lipids was not affected by the diet. In conclusion, the present study showed that European seabass can be successfully fed the SSH diet for two months in a commercial setting.
