<abstract xmlns="http://www.w3.org/1999/xhtml">This study was performed to determine the effects of dietary supplementation with β-glucan on the growth performance and skin-mucus microbiota of sea trout, <italic>Salmo trutta</italic> L. in Latvia. The investigations were performed during an eight-month period (September 2018 – April 2019). A total of 15,000 sea trout were divided into five groups. The experimental fish were fed formulated diets enriched with 1 g kg−1 β-glucan (D2), 3 g kg−1 β-glucan (D3), 6 g kg−1 biological product BGN-2 (BGN-2) (D4), and 14 g kg−1 BGN-2 (D5). The control diet (D1) was not supplemented. Our results showed that fish fed diets D4 and D5 achieved significantly (P &lt; 0.05) higher growth parameters compared to those fed the other diets. <italic>Pseudomonas</italic> and <italic>Aeromonas</italic> were detected as the main component of fish skin and gill microbiota. Beta-glucan did not affect the skin-mucus microbiota of the sea trout. All isolates were resistant to amoxicillin, ampicillin, cefalexin, and erythromycin and susceptible to gentamicin. The multiple antibiotic resistance index for all isolates was higher than 0.2.</abstract>

This study was performed to determine the effects of dietary supplementation with β-glucan on the growth performance and skin-mucus microbiota of sea trout, Salmo trutta L. in Latvia. The investigations were performed during an eight-month period (September 2018 – April 2019). A total of 15,000 sea trout were divided into five groups. The experimental fish were fed formulated diets enriched with 1 g kg−1 β-glucan (D2), 3 g kg−1 β-glucan (D3), 6 g kg−1 biological product BGN-2 (BGN-2) (D4), and 14 g kg−1 BGN-2 (D5). The control diet (D1) was not supplemented. Our results showed that fish fed diets D4 and D5 achieved significantly (P < 0.05) higher growth parameters compared to those fed the other diets. Pseudomonas and Aeromonas were detected as the main component of fish skin and gill microbiota. Beta-glucan did not affect the skin-mucus microbiota of the sea trout. All isolates were resistant to amoxicillin, ampicillin, cefalexin, and erythromycin and susceptible to gentamicin. The multiple antibiotic resistance index for all isolates was higher than 0.2.

Effect of dietary supplementation with β-glucan on growth performance and skin-mucus microbiota of sea trout (<italic>Salmo trutta</italic>)

Latvia University of Life Sciences and Technologies

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of dietary supplementation with β-glucan on growth performance and skin-mucus microbiota of sea trout ()

This study was performed to determine the effects of dietary supplementation with β-glucan on the growth performance and skin-mucus microbiota of sea trout,...

Effect of dietary supplementation with β-glucan on growth performance and skin-mucus microbiota of sea trout (Salmo trutta)

Article Category: Research Article

Published Online: Nov 18, 2020

Page range: 155 - 165

Received: Apr 14, 2020

Accepted: Sep 23, 2020

DOI: https://doi.org/10.2478/aopf-2020-0019

Keywords
Antibiotics, Aquaculture, β-glucan, Microbiota, Mucus, Sea trout

© 2020 Olga Revina et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of dietary supplementation with β-glucan on growth performance and skin-mucus microbiota of sea trout (Salmo trutta)

Article Category: Research Article

Published Online: Nov 18, 2020

Page range: 155 - 165

Received: Apr 14, 2020

Accepted: Sep 23, 2020

DOI: https://doi.org/10.2478/aopf-2020-0019

KeywordsAntibiotics, Aquaculture, β-glucan, Microbiota, Mucus, Sea trout

© 2020 Olga Revina et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Antibiotics, Aquaculture, β-glucan, Microbiota, Mucus, Sea trout