| 1. |
- Singh, Aprajita, et al.
(författare)
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Dietary Filamentous Fungi and Duration of Feeding Modulates Gut Microbial Composition in Rainbow Trout (Oncorhynchus mykiss)
- 2021
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Ingår i: Frontiers in Marine Science. - : Frontiers Media S.A.. - 2296-7745. ; 8
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Tidskriftsartikel (refereegranskat)abstract
- Changes in gut microbial composition over time in rainbow trout fed differentially processed diets supplemented with the filamentous fungi Neurospora intermedia were investigated in a 30-day feeding trial. Fish were fed a reference diet, non-preconditioned diet (NPD), or preconditioned (heat-treated) diet (PD), with the same inclusion level of N. intermedia in diets NPD and PD. Gut microbiota were analyzed on day 0, 10, 20, and 30. Gut microbial composition was similar for all diets on day 0, but was significantly different at day 10 and day 20. On day 30, the gut again contained similar communities irrespective of diet. The overall gut microbiota for each diet changed over time. Abundance of Peptostreptococcus and Streptococcus was higher in the initial days of feeding in fish fed on commercial diet, while a significant increase in lactic acid bacteria (Lactococcus lactis) was observed on day 30. Feed processing (preconditioning) did not contribute largely in shaping the gut microbiome. These results indicate that dietary manipulation and duration of feeding should be considered when evaluating gut microbial composition in cultured fish. A minimum 30-day feeding trial is suggested for gut microbiome, host and diet interaction studies. Copyright © 2021 Singh, Karimi, Vidakovic, Dicksved, Langeland, Ferreira, Taherzadeh, Kiessling and Lundh.
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| 2. |
- Caretta, Martina Angela, et al.
(författare)
-
Water
- 2022
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Ingår i: Climate Change 2022: Impacts, Adaptation and Vulnerability : Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change - Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change.
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Singh, Aprajita, et al.
(författare)
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Effects of dietary supplementation of lignocellulose-derived cello-oligosaccharides on growth performance, antioxidant capacity, immune response, and intestinal microbiota in rainbow trout (Oncorhynchus mykiss)
- 2024
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Ingår i: Aquaculture. - : Elsevier B.V.. - 0044-8486 .- 1873-5622. ; 578
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Tidskriftsartikel (refereegranskat)abstract
- This study evaluated the prebiotic potential of cello-oligosaccharides (COS) produced from birch (Betula pendula), an under-utilised lignocellulosic source from the forestry industry, on growth performance, mucosal immunity, gut microbiota composition, and antioxidant capacity of juvenile rainbow trout (Oncorhynchus mykiss). In a 45-day trial, the fish were fed with diets containing 0%, 0.1%, 0.5% and 1.5% COS, while a diet containing fructo-oligosaccharides (0.5% FOS) was used as a positive control. Fish fed with the 0.5% and 1.5% COS diets showed significantly (P < 0.05) higher abundance of Ruminococcaceae, Bacillaceae and Lactobacillaceae, in the faecal microbiota. The COS diets also induced higher antioxidant capacity in the gut and serum, but there were no treatment effects (P > 0.05) on growth of rainbow trout. Gene expression analysis of the intestine showed significant elevation (P < 0.05) in expression of complement (c3 and c-type lectin) and receptor (tlr2) genes of the innate immune system in COS-fed fish. However, for cytokine and adaptive immune genes, no significant differences (P > 0.05) in gene transcripts were observed between the COS/FOS diets with the control diet. These results suggest that dietary cello-oligosaccharides can be a useful feed supplement for rainbow trout, which can modulate intestinal microbial communities, innate immune response and antioxidant capacity of the host.
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