Progress in fish gastrointestinal microbiota research

Wang, An R.; Ran, Chao; Ringø, Einar; Zhou, Zhiguang

doi:10.1111/raq.12191

Cited by 449 publications

(383 citation statements)

References 169 publications

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“…; Wang et al. ). Thus differences in the microbial composition of the buccal cavity between MMB and BPMB could indicate differential allocation of resources to the immune system resulting from higher investment of MMB species in either parental care (females) or secondary sexual signals (males).…”

Section: Discussionmentioning

confidence: 98%

Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes*

et al. 2018

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Sexual dimorphism is founded upon a resource allocation trade-off between investments in reproduction versus other life-history traits including the immune system. In species with conventional parental care roles, theory predicts that males maximize their lifetime reproductive success by allocating resources toward sexual selection, while females achieve this through prolonging their lifespan. Here, we examine the interrelation between sexual dimorphism and parental care strategies in closely related maternal and biparental mouthbrooding cichlid fishes from East African Lake Tanganyika. We measured cellular immune parameters, examined the relative expression of 28 immune system and life history-related candidate genes and analyzed the microbiota composition in the buccal cavity. According to our predictions, maternal mouthbrooders are more sexually dimorphic in immune parameters than biparental mouthbrooders, which has possibly arisen through a differential resource allocation into parental care versus secondary sexual traits. Biparental mouthbrooders, on the other hand, which share the costs of parental care, feature an upregulated adaptive immune response and stronger antiviral properties, while their inflammation response is reduced. Overall, our results suggest a differential resource allocation trade-off between the two modes of parental investment.

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Section: Discussionmentioning

confidence: 98%

Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes*

et al. 2018

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“…Modification of microbiota by chemical exposure (including antibiotic, diet, pre or probiotics, etc.) is known to be associated with significant alterations of the organism's physiology, including defect in brain neurodevelopment and neuroplasticity . Recently, a few studies showed that GBH exposure can affect gut microbiota, a process known as dysbiosis and that such an alteration could result in mental health disorders, including anxiety and depression .…”

Section: Introductionmentioning

confidence: 99%

Glyphosate and glyphosate‐based herbicide exposure during the peripartum period affects maternal brain plasticity, maternal behaviour and microbiome

Dechartres

Pawluski

Guéguen

et al. 2019

J Neuroendocrinology

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Glyphosate is found in a large array of non‐selective herbicides such as Roundup® (Monsanto, Creve Coeur, MO, USA) and is by far the most widely used herbicide. Recent work in rodent models suggests that glyphosate‐based herbicides during development can affect neuronal communication and result in altered behaviours, albeit through undefined mechanisms of action. To our knowledge, no study has investigated the effects glyphosate or its formulation in herbicide on maternal behaviour and physiology. In the present study, relatively low doses of glyphosate (5 mg kg‐1 d‐1), Roundup® (5 mg kg‐1 d‐1 glyphosate equivalent), or vehicle were administered by ingestion to Sprague‐Dawley rats from gestational day (GD) 10 to postpartum day (PD)22. The treatments significantly altered licking behaviour toward pups between PD2 and PD6. We also show in the dams at PD22 that Roundup exposure affected the maturation of doublecortin‐immunoreactive new neurones in the dorsal dentate gyrus of the hippocampus of the mother. In addition, the expression of synaptophysin was up‐regulated by glyphosate in the dorsal and ventral dentate gyrus and CA3 regions of the hippocampus, and down‐regulated in the cingulate gyrus. Although a direct effect of glyphosate alone or its formulation on the central nervous system is currently not clear, we show that gut microbiota is significantly altered by the exposure to the pesticides, with significant alteration of the phyla Bacteroidetes and Firmicutes. This is the first study to provide evidence that glyphosate alone or in formulation (Roundup) differentially affects maternal behaviour and modulates neuroplasticity and gut microbiota in the mother.

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“…Research on marine fish herbivory has focused primarily on feeding habits and grazing rates rather than post-ingestive processes (Clements and Choat, 1997; Miyake et al, 2015); and of the limited research that has been conducted on post-ingestive processes, most have focused on gut morphology rather than the functional role of GI microbes (Clements et al, 2009). However, molecular based studies have reported a large variety of microorganisms within the GI tracts of fish, and that their community diversity increases from carnivorous fish to herbivorous fish (Wang et al, 2017). …”

Section: Introductionmentioning

confidence: 99%

The Microbiome of the Gastrointestinal Tract of a Range-Shifting Marine Herbivorous Fish

et al. 2018

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Globally, marine species’ distributions are being modified due to rising ocean temperatures. Increasing evidence suggests a circum-global pattern of poleward extensions in the distributions of many tropical herbivorous species, including the ecologically important rabbitfish Siganus fuscescens. Adaptability of a species to such new environments may be heavily influenced by the composition of their gastrointestinal microbe fauna, which is fundamentally important to animal health. Siganus fuscescens thus provides an opportunity to assess the stability of gastrointestinal microbes under varying environmental conditions. The gastrointestinal microbial communities of S. fuscescens were characterized over 2,000 km of Australia’s western coast, from tropical to temperate waters, including near its current southern distributional limit. Sequencing of the 16S rRNA gene demonstrated that each population had a distinct hindgut microbial community, and yet, 20 OTUs occurred consistently in all samples. These OTUs were considered the ‘core microbiome’ and were highly abundant, composing between 31 and 54% of each population. Furthermore, levels of short chain fatty acids, an indicator of microbial fermentation activity, were similar among tropical and temperate locations. These data suggest that flexibility in the hindgut microbiome may play a role in enabling such herbivores to colonize new environments beyond their existing range.

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Progress in fish gastrointestinal microbiota research

Cited by 449 publications

References 169 publications

Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes*

Effects of parental care on resource allocation into immune defense and buccal microbiota in mouthbrooding cichlid fishes*

Glyphosate and glyphosate‐based herbicide exposure during the peripartum period affects maternal brain plasticity, maternal behaviour and microbiome

The Microbiome of the Gastrointestinal Tract of a Range-Shifting Marine Herbivorous Fish

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