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Gut probiotic bacteria of Barbonymus gonionotus improve growth, hematological parameters and reproductive performances of the host
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Gut probiotic bacteria of Barbonymus gonionotus improve growth, hematological parameters and reproductive performances of the host
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Journal Article
Gut probiotic bacteria of Barbonymus gonionotus improve growth, hematological parameters and reproductive performances of the host
2021
Overview
This study aimed to isolate and identify probiotic bacteria from the gut of
Barbonymus gonionotus
and evaluate their effects on growth, hematological parameters, and breeding performances of the host. Five probiotic bacteria viz
. Enterococcus xiangfangensis
(GFB-1),
Pseudomonas stutzeri
(GFB-2),
Bacillus subtilis
(GFB-3),
Citrobacter freundii
(GFB-4), and
P. aeruginosa
(GFB-5) were isolated and identified using
16S rRNA
gene sequencing. Application of a consortium of probiotic strains (1–3 × 1.35 × 10
9
CFU kg
−1
) or individual strain such as GFB-1 (1.62 × 10
9
CFU kg
−1
), GFB-2 (1.43 × 10
9
CFU kg
−1
), GFB-3 (1.06 × 10
9
CFU kg
−1
), GFB-4 (1.5 × 10
9
CFU kg
−1
) or GFB-5 (1.43 × 10
9
CFU kg
−1
feed) through feed significantly improved growth, histological and hematological parameters and reproductive performances of
B. gonionotus
compared to untreated control. Moreover, the application of these probiotics significantly increased gut lactic acid bacteria and activities of digestive enzymes but did not show any antibiotic resistance nor any cytotoxicity in vitro. The highest beneficial effects on treated fishes were recorded by the application of GFB-1, GFB-2, GFB-3, and a consortium of these bacteria (T2). This is the first report of the improvement of growth and health of
B. gonionotus
fishes by its gut bacteria.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
