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Different dietary protein levels affect meagre (Argyrosomus regius) larval survival and muscle cellularity

AuthorsSaavedra, Margarida; Grade, A.; Candeias-Mendes, A.; Pereira, T. G.; Teixeira, B.; Yúfera, Manuel ; Conceição, L. E. C.; Mendes, R.; Pousão-Ferreira, P.
Meagre larvae
Amino acids
Fatty acids
Muscle cellularity
Issue Date1-Jan-2016
CitationAquaculture 450: 89-94 (2016)
AbstractA high frequency of cannibalism and high variability of growth rate within the same larval batch are the main bottlenecks for implementation of meagre culture. In this study the effect of two sodium alginate-encapsulated diets containing 55 (control) and 68% protein was tested in terms of larval composition, survival, growth and muscle cellularity. The results showed that the diet with higher protein content improved larval survival but no differences on larval growth were observed between treatments. Diets did not affect the amino acid and fatty acid profiles of meagre larvae. The differences between larval fatty acid profiles were mainly related to larval age rather than treatments. Meagre larvae fed the high protein diet showed a higher frequency of white muscle fibres with an area smaller than 150 μm2 and a lower mean fibre area (214.9 ± 160.6 μm2 and 187.88 ± 162.7 μm2, for 55 and 68% of protein, respectively). These results suggest that a higher dietary protein increases meagre larval survival and leads to a potential higher contribution of fibre hyperplasia.
Publisher version (URL)https://doi.org/10.1016/j.aquaculture.2015.07.004
Appears in Collections:(ICMAN) Artículos
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