scholarly journals The Effects of Different Carbon Sources on the Production Environment and Breeding Parameters of Litopenaeus vannamei

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3584
Author(s):  
Yiming Xue ◽  
Li Li ◽  
Shuanglin Dong ◽  
Qinfeng Gao ◽  
Xiangli Tian
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Microbial Community ◽  
Litopenaeus Vannamei ◽  
Carbon Sources ◽  
Ammonia Removal ◽  
Total Alkalinity ◽  
Production Environment ◽  
Microbial Composition ◽  
Linear Discriminant

This study investigated the effect of different carbon sources on water quality, ammonia removal pathways, the bacterial community, and the production of Litopenaeus vannamei in outdoor culture tanks. Three systems were established: a clear water system (CW) and biofloc technology (BFT) systems with added molasses (M-BF) or poly (3-hydroxybutyric acid-co-3-hydrovaleric acid) (PHBV) (P-BF). The average pH, total alkalinity, total organic carbon, biofloc volume, chlorophyll a, nitrite, nitrate, total nitrogen, and nitrification rate were significantly different among the treatments. Microbial composition varied and different dominant taxa were identified in the treatments by linear discriminant analysis effect size. Redundancy analysis indicated that the water quality parameters affected the distribution of the microbial community. Moreover, the genus Leucothrix was closely related to the M-BF treatment. Chemoheterotrophy and aerobic chemoheterotrophy were the most abundant functions in all treatments. A comparison of functions using BugBase indicated that the relative abundance of several functions such as biofilm formation, stress tolerance and functions related to anaerobic processes increased in the M-BF treatment. The specific growth rate, growth rate, and survival rate of shrimp were significantly higher in the P-BF system than in the CW system and the feed conversion ratio in the BFT treatments was significantly lower than that in the CW system. Overall, adding carbon sources affected water quality, microbial community, and shrimp performance. The results show that PHBV is a good alternative to carbon sources.

Light and carbon sources addition alter microbial community in biofloc-based Litopenaeus vannamei culture systems

Aquaculture ◽  
2020 ◽  
Vol 515 ◽  
pp. 734572 ◽  
Author(s):  
Wenwen Jiang ◽  
Wenjing Ren ◽  
Li Li ◽  
Shuanglin Dong ◽  
Xiangli Tian
Keyword(s):  
Microbial Community ◽  
Litopenaeus Vannamei ◽  
Carbon Sources ◽  
Culture Systems

scholarly journals Does Water Quality Affect the Plankton Dynamics and the Specific Growth Rate of Litopenaeus vannamei?

2021 ◽  
Author(s):  
Muhammad Musa ◽  
Sulastri Arsad ◽  
Mohammad Mahmudi ◽  
Evellin Lusiana ◽  
Naura Agharid ◽  
...  
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Specific Growth Rate ◽  
Litopenaeus Vannamei ◽  
Specific Growth ◽  
Plankton Dynamics

The effect of different carbon sources on water quality, microbial community and structure of biofloc systems

Aquaculture ◽  
2018 ◽  
Vol 482 ◽  
pp. 103-110 ◽  
Author(s):  
Min Deng ◽  
Jieyu Chen ◽  
Jingwei Gou ◽  
Jie Hou ◽  
Dapeng Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Microbial Community ◽  
Carbon Sources

scholarly journals Gastric microbial community profiling reveals a dysbiotic cancer-associated microbiota

Gut ◽  
2017 ◽  
Vol 67 (2) ◽  
pp. 226-236 ◽  
Author(s):  
Rui M Ferreira ◽  
Joana Pereira-Marques ◽  
Ines Pinto-Ribeiro ◽  
Jose L Costa ◽  
Fatima Carneiro ◽  
...  
Keyword(s):  
Microbial Community ◽  
Gastric Carcinoma ◽  
Chronic Gastritis ◽  
Gene Profiling ◽  
Rrna Gene ◽  
Microbial Composition ◽  
Linear Discriminant ◽  
Microbial Dysbiosis ◽  
Functional Features ◽  
Gastric Microbiota

ObjectiveGastric carcinoma development is triggered by Helicobacter pylori. Chronic H. pylori infection leads to reduced acid secretion, which may allow the growth of a different gastric bacterial community. This change in the microbiome may increase aggression to the gastric mucosa and contribute to malignancy. Our aim was to evaluate the composition of the gastric microbiota in chronic gastritis and in gastric carcinoma.DesignThe gastric microbiota was retrospectively investigated in 54 patients with gastric carcinoma and 81 patients with chronic gastritis by 16S rRNA gene profiling, using next-generation sequencing. Differences in microbial composition of the two patient groups were assessed using linear discriminant analysis effect size. Associations between the most relevant taxa and clinical diagnosis were validated by real-time quantitative PCR. Predictive functional profiling of microbial communities was obtained with PICRUSt.ResultsThe gastric carcinoma microbiota was characterised by reduced microbial diversity, by decreased abundance of Helicobacter and by the enrichment of other bacterial genera, mostly represented by intestinal commensals. The combination of these taxa into a microbial dysbiosis index revealed that dysbiosis has excellent capacity to discriminate between gastritis and gastric carcinoma. Analysis of the functional features of the microbiota was compatible with the presence of a nitrosating microbial community in carcinoma. The major observations were confirmed in validation cohorts from different geographic origins.ConclusionsDetailed analysis of the gastric microbiota revealed for the first time that patients with gastric carcinoma exhibit a dysbiotic microbial community with genotoxic potential, which is distinct from that of patients with chronic gastritis.

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