Effects of Partial Substitution of Conventional Protein Sources with Duckweed (<i>Lemna minor</i>) Meal in the Feeding of Rainbow Trout (<i>Oncorhynchus mykiss</i>) on Growth Performances and the Quality Product
Elisa Fiordelmondo,
Simona Ceschin,
Gian Enrico Magi,
Francesca Mariotti,
Nicolaia Iaffaldano,
Livio Galosi,
Alessandra Roncarati
Affiliations
Elisa Fiordelmondo
School of Biosciences and Veterinary Medicine, University of Camerino, Viale Circonvallazione 93–95, 62024 Matelica, Italy
Simona Ceschin
Laboratory of Systematic and Environmental Botany, Department of Sciences, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
Gian Enrico Magi
School of Biosciences and Veterinary Medicine, University of Camerino, Viale Circonvallazione 93–95, 62024 Matelica, Italy
Francesca Mariotti
School of Biosciences and Veterinary Medicine, University of Camerino, Viale Circonvallazione 93–95, 62024 Matelica, Italy
Nicolaia Iaffaldano
Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctis s/n, 86100 Campobasso, Italy
Livio Galosi
School of Biosciences and Veterinary Medicine, University of Camerino, Viale Circonvallazione 93–95, 62024 Matelica, Italy
Alessandra Roncarati
School of Biosciences and Veterinary Medicine, University of Camerino, Viale Circonvallazione 93–95, 62024 Matelica, Italy
Duckweed (Lemna minor) meal was included in the formulation of three experimental feeds (L1, L2, L3) for rainbow trout at 10%, 20%, 28% of the protein source, respectively. Increasing the duckweed inclusion, the other protein sources were adjusted to get isonitrogenous (41%) and isolipidic (20%) diets, as the control diet (LC). 540 fish (mean body weight 124.5 ± 0.7 g) were randomly allocated in 12 tanks divided equally among the four different diets. After 90 days, fish were weighed and the most important productive performances, fillet quality and fatty acid profile were determined. The final body weight in L1 (340.53 g) and L2 (339.42 g) was not different from LC (348.80 g); L3 trout significantly (p Lemna minor can be included in the feed for the rainbow trout without negative effects on the growth performances at 20% of the protein substitution.
