Browsing by Author "Viegas, Sofia Isabel Martins"
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- Effects of a fast growth microdiet on larval development of gilthead seabream (Sparus aurata, Linnaeus, 1758) and meagre (Argyrosomus regius, Asso, 1801)Publication . Viegas, Sofia Isabel Martins; Pousão-Ferreira, Pedro; Engrola, SofiaWord aquaculture production continues to grow. Nowadays, due to the huge increase in human population, demand for animal products and its derivates is increasing drastically, where aquaculture represents one of the most forms of supplying the world with food. Gilthead seabream, Sparus aurata plays an important commercial role in fisheries and aquaculture in the Mediterranean Sea and north-eastern Atlantic Ocean. Meagre (Argyrosomus regius) have a high growth and food conversion rates, high marketable value, the quality of the fillet and resistance to diseases is considerably higher than those of seabream and seabass. Fish feeding is one of the most important factors in intensive fish farming. Nutritional requirements to sustain survival and growth in marine fish larvae are slightly different from those of juveniles. In the larval rearing, the quality of food is essential for the larvae obtain necessary nutrients for normal development. The aims of this study were to evaluate the impact of two new formulated microdiets, in comparison with a commercial diet (control), on the growth, survival and quality of gilthead seabream (Sparus aurata) and meagre (Argyrosomus regius) larvae. To evaluate growth were performed (1) total length; (2) dry weight; and (3) specific growth rate analysis. At the end of the experiments, to evaluate quality were performed malformations analysis and the survival was compared between the different treatments. For future studies is recommended the used of microdiet FAST61/22, since in these experiments gives to the larvae the best growth performance and larval development. While meagre seem to require higher dietary protein and lipid, due to their much fast growth, for gilthead seabream a higher dietary lipid may be sufficient to guarantee maximum performance.