Gut microbial diversity increases with social rank in the African cichlid fish, Astatotilapia burtoni

Singh, Avehi; Faber-Hammond, Joshua J.; O'Rourke, Cynthia F.; Renn, Suzy C. P.

doi:10.1016/j.anbehav.2019.04.003

Cited by 8 publications

(4 citation statements)

References 117 publications

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“…The relevance of environmental microbes is an important facet to consider when measuring host fitness as microbiota dysbiosis has been associated with factors that might reduce research translatability, such as immune function (Fujimura et al, 2014 ; Schuijt et al, 2016 ; Zhang et al, 2021 ), metabolism (Fan & Pedersen, 2021 ; Raymann & Moran, 2018 ; Sommer et al, 2016 ) and behavior (Davidson et al, 2020 ; Raulo et al, 2021 ; Singh et al, 2019 ). However, in our experiment, housing animals in a (semi) sterile environment or an environment enriched with natural elements had a similar effect on microbial alpha diversity patterns.…”

Section: Discussionmentioning

confidence: 99%

Enriching captivity conditions with natural elements does not prevent the loss of wild‐like gut microbiota but shapes its compositional variation in two small mammals

et al. 2022

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As continued growth in gut microbiota studies in captive and model animals elucidates the importance of their role in host biology, further pursuit of how to retain a wild‐like microbial community is becoming increasingly important to obtain representative results from captive animals. In this study, we assessed how the gut microbiota of two wild‐caught small mammals, namely Crocidura russula (Eulipotyphla, insectivore) and Apodemus sylvaticus (Rodentia, omnivore), changed when bringing them into captivity. We analyzed fecal samples of 15 A. sylvaticus and 21 C. russula , immediately after bringing them into captivity and 5 weeks later, spread over two housing treatments: a “natural” setup enriched with elements freshly collected from nature and a “laboratory” setup with sterile artificial elements. Through sequencing of the V3–V4 region of the 16S recombinant RNA gene, we found that the initial microbial diversity dropped during captivity in both species, regardless of treatment. Community composition underwent a change of similar magnitude in both species and under both treatments. However, we did observe that the temporal development of the gut microbiome took different trajectories (i.e., changed in different directions) under different treatments, particularly in C. russula , suggesting that C. russula may be more susceptible to environmental change. The results of this experiment do not support the use of microbially enriched environments to retain wild‐like microbial diversities and compositions, yet show that specific housing conditions can significantly affect the drift of microbial communities under captivity.

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Section: Discussionmentioning

confidence: 99%

Enriching captivity conditions with natural elements does not prevent the loss of wild‐like gut microbiota but shapes its compositional variation in two small mammals

et al. 2022

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“…Interestingly, recent findings in the African cichlid Astatotilapia burtoni highlighted that fish which experienced stressful conditions induced by subordinate social rank displayed a reduced faecal microbial community α-diversity (Singh et al, 2019). Also in captive mice and in wild red squirrels (Tamiasciurus hudsonicus) socially mediated stress affected the intestinal microbiota leading to a reduction in microbial diversity and richness (Bailey et al, 2011;Stothart et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Effects of rearing density on growth, digestive conditions, welfare indicators and gut bacterial community of gilthead sea bream (Sparus aurata, L. 1758) fed different fishmeal and fish oil dietary levels

et al. 2020

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2020. Effects of rearing density on growth, digestive conditions, welfare indicators and gut bacterial community of gilthead sea bream (Sparus aurata, L. 1758) fed different fishmeal and fish oil dietary levels. Aquaculture, 518, 734850The final published version is available online at: https://doi.org/10. 1016/j.aquaculture.2019.734854 Rights / License:The terms and conditions for the reuse of this version of the manuscript are specified in the publishing policy. For all terms of use and more information see the publisher's website. Effects of rearing density on growth, digestive conditions, welfare indicators and gut bacterial community of gilthead sea bream (Sparus aurata, L. 1758) fed different fishmeal and fish oil dietary levels Abstract In Mediterranean aquaculture, significant advances have been made towards a reduction of marine-derived ingredients in aquafeed formulation, as well as in defining the effect on how environmental factors such as rearing density interact with fish health. Little research, however, has examined the interaction between rearing density and dietary composition on main key performance indicators, physiological processes and gut bacterial community. A study was undertaken, therefore to assess growth response, digestive enzyme activity, humoral immunity on skin mucus, plasma biochemistry and gut microbiota of gilthead sea bream (Sparus aurata, L. 1758) reared at high (HD, 36-44 kg m −3 ) and low (LD, 12-15 kg m −3 ) final stocking densities and fed high (FM30/FO15, 30% fishmeal FM, 15% fish oil, FO) and low (FM10/FO3; 10% FM and 3% FO) FM and FO levels. Isonitrogenous and isolipidic extruded diets were fed to triplicate fish groups (initial weight: 96.2 g) to overfeeding over 98 days. The densities tested had no major effects on overall growth and feed efficiency of sea bream reared at high or low FM and FO dietary level. However, HD seems to reduce feed intake compared to LD mainly in fish fed FM30/FO15. Results of digestive enzyme activity indicated a comparable digestive efficiency among rearing densities and within each dietary treatment even if intestinal brush border enzymes appeared to be more influenced by stocking density compared to gastric and pancreatic enzymes. Plasma parameters related to nutritional and physiological conditions were not affected by rearing densities under both nutritional conditions a similar observation was also achieved through the study of lysozyme, protease, antiprotease and total protein determination in skin mucus, however; in this case lysozyme was slightly reduced at HD. For the first time on this species, the effect of 4 rearing density on gut bacterial community was studied. Different response in relation to dietary treatment under HD and LD were detected. Low FM-FO diet maintained steady the biodiversity of the gut bacterial community between LD and HD conditions while fish fed high FM-FO level showed a reduced biodiversity at HD. According to the results, it seems feasible to rear gilthead sea bream at the on-growing phase at a density...

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“…The decreasing of alpha-diversity indices in fish species may lead to reduced competition for opportunistic or invading pathogens which may enter the gastrointestinal tract of fish via feed or water [52,63]. Reducing diversity GM in fish has been associated with stressful conditions such as rearing density [52] and feeding competition [64] and also characterized the GM of unhealthy rainbow trout experiencing bacterial kidney disease (BKD) [65].…”

Section: Discussionmentioning

confidence: 99%

Effects of increasing dietary level of organic acids and nature-identical compounds on growth, intestinal cytokine gene expression and gut microbiota of rainbow trout (Oncorhynchus mykiss) reared at normal and high temperature

Pelusio

Rossi²,

Parma

et al. 2020

Fish & Shellfish Immunology

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Gut microbial diversity increases with social rank in the African cichlid fish, Astatotilapia burtoni

Cited by 8 publications

References 117 publications

Enriching captivity conditions with natural elements does not prevent the loss of wild‐like gut microbiota but shapes its compositional variation in two small mammals

Enriching captivity conditions with natural elements does not prevent the loss of wild‐like gut microbiota but shapes its compositional variation in two small mammals

Effects of rearing density on growth, digestive conditions, welfare indicators and gut bacterial community of gilthead sea bream (Sparus aurata, L. 1758) fed different fishmeal and fish oil dietary levels

Effects of increasing dietary level of organic acids and nature-identical compounds on growth, intestinal cytokine gene expression and gut microbiota of rainbow trout (Oncorhynchus mykiss) reared at normal and high temperature

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