Mucosal bacteriomes of rainbow trout (Oncorhynchus mykiss) intestines are modified in response to dietary phytase

Aquaculture, Journal Year: 2023, Volume and Issue: 574, P. 739672 - 739672

Published: May 15, 2023

Language: Английский

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The gut microbiome of farmed Arctic char (Salvelinus alpinus) is shaped by feeding stage and nutrient presence

FEMS Microbes, Journal Year: 2024, Volume and Issue: 5

Published: Jan. 1, 2024

Abstract The gut microbiome plays an important role in maintaining health and productivity of farmed fish. However, the functional most microorganisms remains unknown. Identifying stable members microbiota understanding their roles could aid selection positive traits or act as a proxy for fish aquaculture. Here, we analyse microbial community juvenile Arctic char (Salvelinus alpinus) reconstruct metabolic potential its main symbionts. undergoes succession composition during first weeks post-hatch, with decrease Shannon diversity establishment three dominant bacterial taxa. genome abundant bacterium, Mycoplasma sp., shows adaptation to rapid growth nutrient-rich environment. second taxon, Brevinema has versatile potential, including genes involved host mucin degradation utilization. periods absent content, Ruminococcaceae bacterium becomes dominant, possibly outgrowing all other bacteria through production secondary metabolites quorum sensing cross-inhibition while benefiting short-chain fatty acid production. Whereas is often present symbiont salmonids, show that species also detected wild char, suggesting close evolutionary relationship between this symbiotic bacterium.

Language: Английский

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The early life microbiome of giant grouper (Epinephelus lanceolatus) larvae in a commercial hatchery is influenced by microorganisms in feed

Animal Microbiome, Journal Year: 2024, Volume and Issue: 6(1)

Published: Sept. 17, 2024

Language: Английский

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A review on comparative analysis of marine and freshwater fish gut microbiomes: insights into environmental impact on gut microbiota

FEMS Microbiology Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

Abstract The gut microbiota, which includes prokaryotes, archaea, and eukaryotes like yeasts, some protozoa, fungi, significantly impact fish by affecting digestion, metabolism, the immune system. In this research, we combine various tasks carried out bacteria in of fish. This study also examines microbiome composition marine freshwater fish, identifying important bacterial species linked to different biological functions. diversity within highlights importance considering nutrition, habitat, environmental factors microbiological research on ever-changing indicates that microbial communities are specifically adapted meet needs both host its environment. can adjust a specific environment with help microbiota. is crucial for comprehending complex relationships between their aquatic environments. These discoveries have implications aquaculture practices, fisheries administration, broader ecological processes With further progress area study, knowledge acquired would offer valuable standpoint enhance our comprehension microbiology sustainability nutrition resources.

Language: Английский

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Effect of dietary phytase on water and fecal prokaryotic and eukaryotic microbiomes in a hybrid tilapia (Oreochromis aureus x O. niloticus) mixotrophic biofloc production system

Aquaculture, Journal Year: 2023, Volume and Issue: 581, P. 740433 - 740433

Published: Dec. 1, 2023

Language: Английский

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Effects of plant-based proteins and handling stress on intestinal mucus microbiota in rainbow trout

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Dec. 19, 2023

Via 16S rRNA gene amplicon sequencing, this study explores whether the gut mucus microbiota of rainbow trout is affected by interaction a plant-protein-based diet and daily handling stressor (chasing with fishing net) across two genetic lines (A, B). Initial body weights fish from A B were 124.7 g 147.2 g, respectively. Fish fed 1.5% weight per day for 59 days either experimental diets, differing in their meal [fishmeal-based (F): 35%, plant-based (V): 7%] protein content (diet F: 47%, V: 73%). No diet- or stress-related effect on performance was observed at end trial. However, we found significantly increased ASVs intestinal F compared to V. significant differences Shannon diversity could be between treatments. The autochthonous V dominated representatives genera Mycoplasma, Cetobacterium, Ruminococcaceae, whereas Enterobacteriaceae Photobacterium associated F. bacteria both separated diet, but neither stress nor an interaction, as obtained via PERMANOVA. pairwise comparisons revealed that only stressed fish. Therefore, our findings indicate mucus-associated primarily modulated source, modulation mediated status

Language: Английский

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Bacterial community structures and dynamics associated with rotated positioning syndrome in gilthead sea bream (Sparus aurata) larviculture

Frontiers in Aquaculture, Journal Year: 2024, Volume and Issue: 2

Published: Jan. 4, 2024

Introduction The availability of high-quality gilthead seabream ( Sparus aurata ) larvae in larviculture represents a major bottleneck to the aquaculture. This challenge can be compounded by losses resulting from emergence clinical disorder’s symptomatology. In this study, observed syndrome included rotated positioning larval sagittal plane and most cases leading eventually death. Methods Herein, we examined using amplicon sequencing 16S rDNA bacterial communities associated with S. at different conditions (including both fish no evidence syndrome) during early developmental stages along contribution rearing water, organic matter provided feed microbiota an experiment 18 days. Results Over development larvae, differences were composition between healthy symptomatic as well components system. A remarkable presence members Psychrobacter genus was significant increase 18dph. harbor profile dominance Vibrio Bacillus genera 3-8dph, various Alphaproteobacteria 11-14dph Marinifilum water showed compared other components, slight effect 3-8dph. bacteriome feeds found diverse. Chlorella mainly dominated Firmicutes, while Rotifer Artemia Proteobacteria including species . At 18dph, seems affect bacteriome, where it enhanced spp. Discussion Interestingly, comparative network analysis 18dph indicated that associations primarily driven genus. While phyla contributed frequencies Proteobacteria, Bacteroidota Firmicutes phyla. Finally, Gammaproteobacteria/Alphaproteobacteria ratio related health condition larvae. study provides valuable information which used indicators for monitoring status

Language: Английский

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Active colonisers of the gastrointestinal tract of Atlantic salmon farmed in a warm water region

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 9, 2024

Background. Atlantic salmon (Salmo salar) farmed in seawater Tasmania (lutruwita) can experience temper-atures close to their thermotolerance limit during summer and Vibrionaceae are a major component of gut microbiome. This study focuses on understanding the microbiome Atlantic gastrointestinal tract via taxonomy, population dynamics, traits main colonists. Results. Multiyear survey and co-occurrence network analyses confirmed novel members Aliivibrio reliably colonise marine pens when confounding influences DNA bacteria from feed water was considered. Aliivibrio Mycoplasma were taxa found mucosal layers. Warm temperature(19°C) experiments performed tanks indicated Vibrio rapidly become predominant digesta that had reduced feeding high faecal cast production while be mostly absent. Salmon-associated isolates share many genes required for host colonisation with faunal mutualist fischeri. Though most seem lack obvious virulence factors, strains two abundant colonising Aliivibriostrain groups possessed cytolethal distending toxin (CDT). Conclusions. surveys confirm relatively warm conditions persistently colonised by same, largely novel, species restricted range other Vibrionaceae. Some these particularly adept at conditions. some coloniser CDT-genes it is yet unknown whether CDT-gene-positive negatively impact . Since studies possess different colonization enabling mechanisms, interactions between could important overall fish health, especially they exposed stressful conditions, such as elevated sea surface temperatures.

Language: Английский

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The impact of nutritional programming on the microbiota of different gut regions in Atlantic Salmon (Salmo salar) from first feeding in a 22-week feeding trial

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 16, 2024

Increasing evidence suggests that gut microbiota is essential for regulating the development of digestive system, aiding digestion, nutrient metabolism, growth, immune function, and disease resistance. Advances in high throughput sequencing technologies have allowed a broader understanding complex fish, especially relation to impact dietary plant ingredients on health. However, date, most studies focused entire or distal response plant-based diet. Moreover, potential involvement microbiome driving adaptation early-exposed Atlantic salmon diet during later developmental stage, phenomenon commonly referred as ‘nutritional programming’, has yet be demonstrated. The aim was characterise compare composition diversity regions (pyloric caeca, middle intestines) (maintained 22 weeks from first feeding recirculating aquaculture system) with without nutritional programming using 16S rRNA amplicons employed monitor taxa were identified amplicon sequence variants. study experiment followed typical design two experimental groups. Fish initially exposed at challenged 16 post first-feeding six similar considered programmed group, whereas those fed marine control group. alpha higher pyloric caeca than intestine. Analysis similarities showed differentiated each after both low-abundant taxa. Ruminococcaceae (primarily anaerobic Clostridia) comprised core 80% fish group across three known help ferment ingredients. internal environment region mainly selects their microbial assemblages. Additionally, feed water revealed influence fish. Furthermore, Firmicutes, Proteobacteria, Actinobacteriota Bacteroidota prevalent dominant phyla regardless region. Further research required better understand its functional consequences carnivorous

Language: Английский

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Effect of soybean meal enhancements on juvenile Arctic Charr (Salvelinus alpinus) growth performance, gut microbiome and behavior

Applied Animal Behaviour Science, Journal Year: 2024, Volume and Issue: 276, P. 106328 - 106328

Published: July 1, 2024

Language: Английский

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