Publication: Long-term effects of a short juvenile feeding period with diets enriched with the microalgae nannochloropsis gaditana on the subsequent body and muscle growth of gilthead seabream, Sparus aurata L.
Authors
Balsalobre, Noemí ; Chaves-Pozo, Elena ; Sáez, María Isabel ; Galafat, Alba ; Alarcón, Francisco Javier ; Martínez, Tomás Francisco ; Arizcun, Marta ; Ayala Florenciano, María Dolores
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Publisher
MDPI
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DOI
https://doi.org/10.3390/ani13030482
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info:eu-repo/semantics/article
Description
© 2023 by the authors. Licensee MDPI, Basel, Switzerl. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/. This document is the Published version of a Published Work that appeared in final form in Animals. To access the final edited and published work see https://doi.org/10.3390/ani13030482
Abstract
Currently, microalgae are used in fish diets, but their long-term growth effect is unknown. In this experiment, juvenile seabream specimens were fed with microalgae-enriched diets for three months, and then transferred to a microalgae-free diet for 10 months to assess long-term effects up
to commercial size (≈ 27 cm and ≈ 300 g). The juvenile diets contained Nannochloropsis gaditana at 2.5 or 5% inclusion levels, either raw (R2.5 and R5 groups) or cellulose-hydrolyzed (H2.5 and H5 groups). The body length and weight were measured in 75 fish group-1 at commercial stage. The size, number, and fibrillar density of white muscle fibers and the white muscle transverse area were measured in nine fish group-1 at commercial stage. The results showed the highest body weight in H5 at commercial stage. The white muscle transverse area and the white fibres hyperplasia and density also showed the highest values in H5, followed by H2.5. In contrast, the highest hypertrophy was observed in C and R2.5, being associated with the lowest muscle growth in both groups. These results showed a microalgae concentration-dependent effect in hydrolyzed diets as well as an advantageous effect of the hydrolyzed versus raw diets on the long-term growth of Sparus aurata.
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Citation
Animals 2023, 13, 482
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