The gut bacterial microbiome of Nile tilapia (Oreochromis niloticus) from lakes across an altitudinal gradient

Bereded, Negash Kabtimer; Beneberu, Getachew; Fanta, Solomon Workneh; Curto, Manuel; Waidbacher, Herwig; Meimberg, Harald; Domig, Konrad J.

doi:10.1186/s12866-022-02496-z

Cited by 19 publications

(14 citation statements)

References 90 publications

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“…In previous studies on free-ranging Nile tilapia ( Oreochromis niloticus ) and northern leopard frog larvae, the relative abundance of Beijerinckiaceae ( Methylobacterium spp.) was enriched at cool temperatures (Bereded et al, 2022; Kohl and Yahn, 2016), while pinfish ( Lagodon rhomboides ) had higher relative abundances at warmer temperatures (Givens, 2012). Many Beijerinckiaceae members are associated with nitrogen fixing (Marin and Arahal, 2014) which can provide their host with additional energy (Russell et al, 2009), although how this influences larval anuran performance or physiology requires further assessment.…”

Section: Discussionmentioning

confidence: 99%

Heat Tolerance is Affected by the Gut Microbiota in a Vertebrate Ectotherm

Dallas,

Kazarina,

Lee

et al. 2023

Preprint

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The gut microbiota is known to influence and have regulatory effects in diverse physiological functions of host animals, but only recently has the relationship between host thermal biology and gut microbiota been explored. Here, we examined how early-life manipulations of the gut microbiota in larval amphibians influenced their critical thermal maximum (CTmax) at different acclimation temperatures. We removed the resident microbiome on the outside of wild-caught wood frog (Lithobates sylvaticus) egg masses via an antibiotic wash, and then either maintained eggs without a microbiota or inoculated eggs with pond water or the intestinal microbiota of another species, green frogs (L. clamitans), that have a wider thermal tolerance. We predicted that this cross-species transplant would improve the CTmax of the recipient wood frog larvae relative to the other treatments. In line with this prediction, green frog-recipient larvae had the highest CTmax while those with no inoculum had the lowest CTmax. Both the microbiome treatment and acclimation temperature significantly influenced the larval gut microbiota communities and alpha diversity indices. Green frog inoculated larvae were enriched in Rikenellaceae relative to the other treatments, which produce short-chain fatty acids and could contribute to greater energy availability and enhanced heat tolerance. Larvae that received no inoculation had higher relative abundances of potentially pathogenic Aeromonas spp., which negatively affects host health and performance. Our results are the first to show that cross-species gut microbiota transplants alter heat tolerance in a predictive manner. This finding has repercussions for the conservation of species that are threatened by climate change and demonstrates a need to further explore the mechanisms by which the gut microbiota modulates host thermal tolerance.

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Section: Discussionmentioning

confidence: 99%

Heat Tolerance is Affected by the Gut Microbiota in a Vertebrate Ectotherm

Dallas,

Kazarina,

Lee

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Moreover, the sequence of its 16S rRNA gene presents a relatively high level of similarity with that of Alpinimonas psychrophila (97.2%). However, more recently, there have been reports of this organisms within this intestinal microbiota of Nile tilapia ( Oreochromis niloticus ) and Crucian carp ( Carassius auratus ) [ 54 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

Modulation of gut microbiota, blood metabolites, and disease resistance by dietary β-glucan in rainbow trout (Oncorhynchus mykiss)

et al. 2022

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Background Prebiotics are known to have a positive impact on fish health and growth rate, and β-glucans are among the most used prebiotics on the market. In this study, rainbow trout (Oncorhynchus mykiss) were treated with a β-1,3;1,6-glucan dietary supplement (at a dose of 0 g, 1 g, 10 g, and 50 g β-glucan per kg of feed). After 6 weeks, the effect of the β-glucan was evaluated by determining the changes in the microbiota and the blood serum metabolites in the fish. The impact of β-glucan on the immune system was evaluated through a challenge experiment with the bacterial fish pathogen Yersinia ruckeri. Results The microbiota showed a significant change in terms of composition following β-glucan treatment, notably an increase in the relative abundance of members of the genus Aurantimicrobium, associated with a decreased abundance of the genera Carnobacterium and Deefgea. Furthermore, analysis of more than 200 metabolites revealed that the relative levels of 53 metabolites, in particular compounds related to phosphatidylcholines, were up- or downregulated in response to the dietary supplementation, this included the amino acid alanine that was significantly upregulated in the fish that had received the highest dose of β-glucan. Meanwhile, no strong effect could be detected on the resistance of the fish to the bacterial infection. Conclusions The present study illustrates the ability of β-glucans to modify the gut microbiota of fish, resulting in alteration of the metabolome and affecting fish health through the lipidome of rainbow trout.

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“…The genus Cetobacterium, more specifically C. somerae, remains one of the most frequently identified commensals of microbiomes in the skin (and gut and gill) of tilapia (Bereded et al 2022;Elsaied et al 2019;Elsheshtawy et al 2021;McMurtrie et al 2022). Isolates from freshwater fish guts have been shown to synthesize vitamin B12 (Sugita et al 1991;Tsuchiya et al 2008), which is speculated to promote fish health.…”

Section: Microbiomes Of Surface Mucosa In Tilapiamentioning

confidence: 99%

Tilapia aquaculture, emerging diseases, and the roles of the skin microbiomes in health and disease

et al. 2023

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Aquaculture is playing an increasingly important role in global food security, especially for low-income and food-deficit countries. The majority of aquaculture production occurs in freshwater earthen ponds and tilapia has quickly become one of the most widely adopted culture species in these systems. Tilapia are now farmed in over 140 countries facilitated by their ease of production, adaptability to a wide range of environmental conditions, fast growth, and high nutritional value. Typically, tilapia have been considered a hardy, disease resilient species; however, the disease is increasing with subsequent threats to the industry as their production is intensified. In this review, we discuss tilapia production, with a focus on Bangladesh as one of the top producing countries, and highlight the problems associated with disease and treatment approaches for them, including the misuse of antimicrobials. We address a key missing component in understanding health and disease processes for sustainable production in aquaculture, specifically the role played by the microbiome. Here we examine the importance of the microbiome in supporting health, focused on the symbiotic microbial community of the fish skin mucosal surface, the abiotic and biotic factors that influence the microbiome, and the shifts that are associated with diseased states. We also identify conserved taxa of skin microbiomes that may be used as indicators of health status for tilapia offering new opportunities to mitigate and manage the disease and optimize environmental growing conditions and farming practices.

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The gut bacterial microbiome of Nile tilapia (Oreochromis niloticus) from lakes across an altitudinal gradient

Cited by 19 publications

References 90 publications

Heat Tolerance is Affected by the Gut Microbiota in a Vertebrate Ectotherm

Heat Tolerance is Affected by the Gut Microbiota in a Vertebrate Ectotherm

Modulation of gut microbiota, blood metabolites, and disease resistance by dietary β-glucan in rainbow trout (Oncorhynchus mykiss)

Tilapia aquaculture, emerging diseases, and the roles of the skin microbiomes in health and disease

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