Role of dietary seaweed supplementation on growth performance, digestive capacity and immune and stress responsiveness in European seabass (Dicentrarchus labrax)

By M. Peixoto, E. Salas-Leiton, L. Pereira, A. Queiroz, Fernando Antunes Magalhães, R. Pereira, Helena Abreu, P. Reis, J. Gonçalves, R. Ozório. 2016

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Abstract This work aimed to appraise growth performance, digestive capacity and immune and stress responsiveness in European seabass ( Dicentrarchus labrax ) when fed diets supplemented with seaweeds. A control diet (without supplementation) was tested against 6 practical diets supplemented either with Gracilaria spp., Ulva spp., or Fucus spp., at 2.5 or 7.5% levels, plus an additional diet with a blend of the three seaweeds, each supplemented at 2.5% ( Mix ). Seabass juveniles (24.0 ± 6.3 g) were fed the experimental diets for 84 days. Dietary seaweed supplementation had no effect on growth rate (DGI: 1.0–1.1), voluntary feed intake (11.3–12.6 g kg −1  ABW −1  day −1 ), feed conversion ratio (FCR: 1.2–1.4) and protein efficiency ratio (PER: 1.5–1.8). Lipase activity was significantly higher in fish fed Mix diet when compared to control (P  Ulva at 2.5% had an increase in LYS when compared to fish fed control and Ulva at 7.5% diets. Overall, our results indicate that the use of dietary seaweed supplementation improves immune and antioxidant responses in European seabass without compromising growth performance.

Subfields: Aquatic Science, Plant Science

View Paper: https://www.semanticscholar.org/paper/388069959075cdf888b046b34ec8c1e1b7c77499

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