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61,005 resultsShowing papers similar to Seasonal variations in microbial diversity and metabolite profiles of the gut of sea cucumber (Apostichopus japonicus)
ClearPhysiological and intestinal microbiota responses of sea cucumber Apostichopus japonicus to various stress and signatures of intestinal microbiota dysbiosis
Scientists tested how six common aquaculture stressors, including high temperature, low salinity, ammonia, and overcrowding, affect the gut health and microbial communities of sea cucumbers. All stressors reduced growth and digestive function while shifting the balance of gut bacteria, with potentially harmful bacteria increasing under several conditions. The study identified specific microbial ratio changes as signatures of gut disturbance, which could be useful markers for monitoring sea cucumber health in aquaculture.
The Structure and Function of Gut Microbiomes of Two Species of Sea Urchins, Mesocentrotus nudus and Strongylocentrotus intermedius, in Japan
This study characterized the gut microbiomes of two sea urchin species important to Japanese marine aquaculture using metagenomic methods, revealing distinct microbial communities linked to habitat and growth conditions. Understanding the microbiome of aquaculture organisms is relevant to their health and food safety, particularly given that environmental contaminants including microplastics can alter gut microbiota.
The interplay between host-specificity and habitat-filtering influences sea cucumber microbiota across an environmental gradient of pollution
Researchers studied how pollution levels along a Hong Kong coastline affect the gut and skin microbiomes — communities of bacteria living on and in organisms — of a tropical sea cucumber, finding that the animal maintains its own distinct microbial community even in highly polluted areas. This suggests sea cucumbers have strong internal mechanisms that shape their microbiome independently of the surrounding environment, which may help them survive in contaminated coastal waters.
Temporal stability and assembly mechanisms of gut microbiota in sea cucumbers response to nanoplastics treatment
Researchers studied how nanoplastic ingestion affects the gut microbiota of sea cucumbers (Apostichopus japonicus), an important aquaculture species. The study found that exposure to nanoplastics at concentrations of 100 and 500 mg/kg caused significant changes in gut microbial community composition after 21 days, suggesting potential impacts on the health of farmed marine organisms.
The interplay between host-specificity and habitat-filtering influences sea cucumber microbiota across an environmental gradient of pollution
Researchers examined how environmental pollution gradients influence intra-specific variation in microbiota diversity and structure across skin, gut, sediment, and water communities associated with sea cucumbers. They found that both host-specificity and habitat-filtering interact to shape microbial communities along pollution gradients, with animal-associated microbiota showing distinct patterns compared to environmental communities.
Differences in gut microbial diversity and composition between growth phenotypes of farmed juvenile sandfish, Holothuria scabra
Researchers analyzed the gut bacteria of farmed sandfish sea cucumbers to understand why individuals from the same batch grow at different rates. They found that fast-growing and slow-growing animals had distinct gut microbial communities with different predicted metabolic functions. The study also cautioned that fecal samples do not accurately represent the gut microbiome, which is important for future aquaculture research methods.
Insights into the Gut Microbiota of the Freshwater Crab Sinopotamon planum across Three Seasons and Its Associations with the Surrounding Aquatic Microbiota
Researchers characterized the gut microbiota of freshwater crab Sinopotamon planum across three seasons, finding seasonal shifts in microbial community composition that correlated with changes in surrounding aquatic microbiota and environmental conditions.
Adverse effects of polystyrene nanoplastics on sea cucumber Apostichopus japonicus and their association with gut microbiota dysbiosis
Researchers used multiple advanced techniques to study how polystyrene nanoplastics affect sea cucumbers, an important aquaculture species. They found that nanoplastic exposure disrupted the animals' gut microbiome, triggered inflammation, and impaired immune function. The study suggests that nanoplastic pollution in aquaculture environments could harm the health of commercially farmed marine species.
Microplastic ingestion by the farmed sea cucumber Apostichopus japonicus in China
Sea cucumbers farmed along China's Bohai and Yellow Seas were found to ingest microplastics, with particles also detected in their coelomic fluid — suggesting internal translocation beyond the gut. The findings indicate farmed sea cucumbers may serve as useful sentinels for monitoring sediment microplastic pollution at aquaculture sites.
The gut microbial of sea urchin ( Strongylocentrotus intermedius ) under different temperatures: Microbial structure and co-occurrence patterns
Researchers exposed sea urchins to five temperatures ranging from 13 to 25°C and used high-throughput sequencing to show that elevated temperatures increase gut bacterial diversity, shift dominant genera, alter key metabolic pathways, and strengthen deterministic assembly processes, providing mechanistic insight into how warming reshapes invertebrate gut microbiomes.
Existence of microplastics in the edible part of the sea cucumber Apostichopus japonicus
Researchers demonstrated that microplastics can transfer into the edible body wall of sea cucumbers (Apostichopus japonicus), entering through the outer surface and potentially posing a threat to human health through seafood consumption.
Behavioral and Physiological Requirements for Artificial Shelters in Juvenile Sea Cucumbers Apostichopus japonicus
Not relevant to microplastics — this study investigates why some juvenile sea cucumbers (Apostichopus japonicus) prefer artificial shelters while others do not, finding that shelter-seeking individuals have higher digestive demands and different gut microbiota compositions.
RNA sequencing provides insights into the effect of dietary ingestion of microplastics and cadmium in the sea cucumber Apostichopus japonicus
Researchers used RNA sequencing to examine combined microplastic and cadmium exposure effects on sea cucumbers, finding that co-exposure caused the most significant gene expression changes and oxidative stress responses, with 1,618 differentially expressed genes identified.
Effect of PET microplastics on the growth, digestive enzymes, and intestinal flora of the sea cucumber Apostichopus japonicus
Researchers studied how PET microplastics of different sizes and concentrations affect sea cucumbers over a 28-day period. They found that microplastic exposure disrupted digestive enzyme activity and altered the composition of gut bacteria in the animals. The study suggests that microplastic pollution in marine environments could impair the health and digestion of important seafloor organisms even at environmentally relevant levels.
Effects of different temperatures on growth and intestinal microbial composition of juvenile Eriocheir sinensis
Researchers examined how different water temperatures affect the growth and intestinal microbial composition of juvenile Chinese mitten crabs (Eriocheir sinensis), finding that temperature-driven changes in gut microbiota composition influence crab development.
Nanoplastics exposure simplifies the network structure of sea cucumber (Apostichopus japonicus) gut microbiota and improves cluster randomness
Researchers exposed sea cucumbers to nanoplastics and found that the particles significantly reduced the diversity and stability of their gut bacteria, shifting the microbial community toward potentially harmful species. The good news is that after 35 days in clean water, the gut microbiome largely recovered to its pre-exposure state. The study reveals that while nanoplastic exposure disrupts the gut health of marine animals, some recovery is possible once the exposure stops.
Seasonal dynamics of the microbiome-host response to pharmaceuticals and pesticides in Mytilus galloprovincialis farmed in the Northwestern Adriatic Sea
Researchers studied how Mediterranean mussels farmed in the Adriatic Sea respond to pharmaceutical and pesticide pollution across different seasons, examining both the animals' biology and their associated microbiomes. They found that the mussel microbiome plays a significant role in the organisms' response to environmental contaminants, with seasonal variation influencing both pollutant exposure and microbial community composition. The study highlights that understanding microbiome-host interactions is important for assessing how marine organisms cope with chemical pollution.
Supplementation of Enzymatic Hydrolysate in Low-Fishmeal and Low-Crop Diet Improves Growth, Antioxidant Capacity, and Immunity of Juvenile Sea Cucumber Apostichopus japonicus (Selenka)
Researchers tested whether enzymatic hydrolysate could replace fishmeal and soybean meal in diets for juvenile sea cucumbers, an important aquaculture species. They found that sea cucumbers fed the hydrolysate-supplemented diet showed improved growth, stronger antioxidant defenses, and enhanced immune function. The study supports using enzymatic hydrolysate as a sustainable feed ingredient that could reduce aquaculture's dependence on conventional protein sources.
Fate of Microplastic Fibers in the Coelomic Fluid of the Sea Cucumber Apostichopus japonicus
Microplastic fibers were found to enter the coelomic fluid of sea cucumbers and move between internal tissues, suggesting that these commercially important marine animals can internalize and redistribute microplastics throughout their bodies.
Variations and Interseasonal Changes in the Gut Microbial Communities of Seven Wild Fish Species in a Natural Lake with Limited Water Exchange during the Closed Fishing Season
Researchers analyzed the gut bacteria of seven wild fish species in Chaohu Lake, China, across all four seasons and found significant differences in microbial communities between species and across seasons. Environmental factors like water temperature and dissolved oxygen levels were key drivers of these microbial shifts. The study provides a baseline understanding of how natural conditions shape the gut health of wild freshwater fish populations.
Integrated Metagenomic and Metabolomic Analysis on Two Competing Mussels, Mytella strigata and Perna viridis, in China
Researchers used integrated metagenomic and metabolomic analysis to compare the invasive mussel Mytella strigata with the native Perna viridis in China, finding that the invasive species exhibits distinct gut microbial communities and metabolic profiles that may contribute to its competitive advantage.
Seasonal Dynamics of Marine Bacterial Communities in Aquaculture Farms: The case of the Northern Ionian Coastal Ecosystem (Mediterranean Sea)
Researchers characterized seasonal bacterial community dynamics across three Greek aquaculture farms in the Mediterranean, finding lower microbial diversity at farm sites compared to controls, with season being the primary driver of community composition changes.
Monitoring Bacterial Community Dynamics in Abalone (Haliotis discus hannai) and the Correlations Associated with Aquatic Diseases
This study profiled bacterial communities in abalone intestines and surrounding aquaculture waters over multiple months using 16S rRNA pyrosequencing, finding that intestinal microbiota had lower diversity than surrounding seawater. During months when abalones were most susceptible to disease, Mycoplasma spp. dominated the intestinal microbiome.
Potential harmful impacts of micro- and nanoplastics on the health of a tropical sea cucumber, Holothuria leucospilota, evidenced by changes of gut microflora, histology, immune and oxidative indexes
Scientists exposed tropical sea cucumbers to both nano-sized and micro-sized plastic particles and found that both caused gut damage, altered the gut microbiome, triggered oxidative stress, and disrupted immune function. Notably, the smaller nanoplastics had stronger effects than the larger microplastics, and plastic particles were observed accumulating in the gut tissue.