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Effect on muscle cellularity ofdDiet supplementation with nannochloropsis gaditana microalgae in the final fattening phase of gilthead seabream culture up to commercial size

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Ayala et al. 2023-fishes.pdf(1.01 MB)
Date
2023-10-24
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Authors
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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Anatomía y Anatomía Patológica Comparadas
DOI
https://doi.org/10.3390/fishes8110532
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info:eu-repo/semantics/article
Description
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. 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 Fishes. To access the final edited and published work see https://doi.org/10.3390/fishes8110532
Abstract
Previous studies have shown that Nannochloropsis gaditana can partially replace fishmeal in the diet of gilthead seabream, Sparus aurata. However, its effect on muscle growth is hardly known. This experiment was carried out with gilthead seabream adults that were fed with N. gaditana at two inclusion levels (2.5 or 5%) either raw (R2.5 and R5 groups) or cellulose-hydrolyzed (H2.5 and H5 groups) for 45 days in the final fattening phase. The body length and body weight were measured in all fish at the beginning and end of the experiment. Also, the white muscle transverse area (WM), size, number and fibrillar density of the white fibers were measured in 9 fish group􀀀1. After 45 days, the body parameters and the WM did not show significant differences among the groups. However, muscle cellularity did show significant differences, such that the hypertrophy values were higher in the H2.5 and H5 than in the R2.5 and R5 groups. On the contrary, R2.5 and R5 showed the highest fibrillar density and hyperplasia values, which are often positively correlated with the fillet firmness and therefore could improve the final quality of the fish. No significant differences attributable to the inclusion levels of N. gaditana were observed.
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Nannochloropsis gaditana , Final fattening phase , Sparus aurata , Muscle cellularity
Citation
Fishes 2023, 8, 532
URI
http://hdl.handle.net/10201/147248
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