Comparative Microbial Community Analysis of Fur Seals and Aquaculture Salmon Gut Microbiomes in Tasmania

D’Agnese, Erin; McLaughlin, Ryan J.; Lea, Mary‐Anne; Soto, Esteban; Smith, Woutrina A.; Bowman, JP

doi:10.3390/oceans4020014

Cited by 3 publications

(1 citation statement)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aliivibrio strains are known to produce an array of chemical messengers [70] due to possessing multiple AHL synthetases (Table 3) and also the LuxS system. In terms of the gut ecosystem Aliivibrio strains may be able to respond to the signals from other strains allowing rapid responses in gene regulation simultaneously maximising tness and competitiveness during both colonization [95]. Potentially linked to signal transduction are potentially pathogen-like functions where some colonists exploit host cells.…”

Section: Discussionmentioning

confidence: 99%

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

Hall,

Reid,

Tan

et al. 2024

Preprint

View full text Add to dashboard Cite

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

show abstract

Section: Discussionmentioning

confidence: 99%

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

Hall,

Reid,

Tan

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Can Suttonella ornithocola entail a potential hazard to songbirds? A systematic review

Martín-Maldonado,

Esperón

2024

Eur J Wildl Res

View full text Add to dashboard Cite

Characterization of bacteria colonizing the mucosal layer of the gastrointestinal tract of Atlantic salmon farmed in a warm water region

Hall,

Reid,

Hamlett

et al. 2024

Preprint

View full text Add to dashboard Cite

Atlantic salmon (Salmo salar) farmed in seawater in Tasmania (lutruwita) can experience temperatures close to their thermotolerance limit during summer. Gut microbiome data from eight successive annual surveys and a specific survey of GI tract mucosa and digesta bacterial cross-sectional distributions indicated members of the genusAliivibrio,Vibrio, and an unclassified Mycoplasmoidaceae are the main colonizers of the gut mucosal layer in Tasmanian farmed salmon. Peak abundance levels are reached after 7-8 months, corresponding to the late summer, following the transfer of hatchery smolt to seawater farms. SalmonAliivibrioisolates comprise three novel non-bioluminescent species distinct from species found in the northern hemisphere growing regions. Along with otherAliivibriospecies these species share many genes required for host colonization and biofilm formation and also include species and strain-level dependent features. Two of the novelAliivibriospecies surprisingly possessed genes for cytolethal distending toxin while the more predominant species lacked any known virulence genes. The overall observations suggest a small number of species actively colonize the mucosal layer of Atlantic salmon farmed in Tasmania and that this process is strongly influenced by the environmental temperature.

show abstract

Comparative Microbial Community Analysis of Fur Seals and Aquaculture Salmon Gut Microbiomes in Tasmania

Cited by 3 publications

References 67 publications

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

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

Can Suttonella ornithocola entail a potential hazard to songbirds? A systematic review

Characterization of bacteria colonizing the mucosal layer of the gastrointestinal tract of Atlantic salmon farmed in a warm water region

Contact Info

Product

Resources

About