Document Type : Original Article
Laboratory of Microbiology and Applied Biotechnology, Department of Biology, Faculty of Sciences of Tetouan, Abdelmalek Essaadi University, 93000 Tetouan, Morocco
Laboratory of Microbiology and Applied Biotechnology, Department of Biology, Faculty of Sciences of Tetouan, Abdelmalek Essaadi University, Tetouan, Morocco
AQUA M’DIQ, Port de M’diq, 93200 M'Diq, Morocco
National Aquaculture Development Agency, 20100 Rabat, Morocco
Specialized Center in Zootechnics and Marine Aquaculture Engineering, National Institute of fisheries Research, M'Diq, 93200 M'Diq, Morocco
Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali, via Consolare Valeria, Messina, Italy
The objective of this study was to assess the biologic impact of four diets based on three species of microalgae on the Mediterranean mussels Mytilus galloprovincialis. For this purpose, flesh weight, linear growth, survival rate and the biochemical composition of mussel flesh have been evaluated. Mussels fed with a mixture of the three species; Nannochloropsis sp., Dunaliella sp., and Phaeodactylum sp., exhibited the highest lipid level (7.66%). This suggests that mixing several species in the same diet favors lipid production. Protein level was significantly higher in mussels fed with Dunaliella sp. (28.92%) compared to Phaeodactylum sp (24.52%), Nannochloropsis sp. (22.94%) and a combination of the three species (26.07%). Wet weight gain was significantly higher in mussels fed with Dunaliella sp. (7.76 g) compared to mussels fed with the mixture of the three species (6.87 g). However, mussel shell length was not different among the four groups, and ranged between 41.7 mm and 42.3 mm. In conclusion, the data from this study suggest that a diet based on Dunaliella sp. can efficiently cover the protein requirements of the Mediterranean mussel, Mytilus galloprovincialis during the growth cycle.