scholarly journals Fine-scale succession patterns and assembly mechanisms of bacterial community of Litopenaeus vannamei larvae across the developmental cycle

Microbiome ◽  
2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Yanting Wang ◽  
Kai Wang ◽  
Lei Huang ◽  
Pengsheng Dong ◽  
Sipeng Wang ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Litopenaeus Vannamei ◽  
Developmental Cycle ◽  
Fine Scale

scholarly journals Fine scale analysis of shifts in bacterial community structure in the chemocline of meromictic Lake Cadagno, Switzerland

2009 ◽  
Vol 68 (1) ◽  
pp. 16 ◽  
Author(s):  
Paola M.A. DECRISTOPHORIS ◽  
Sandro PEDUZZI ◽  
Nadia RUGGERI-BERNARDI ◽  
Dittmar HAHN ◽  
Mauro TONOLLA
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Meromictic Lake ◽  
Fine Scale ◽  
Scale Analysis

scholarly journals Comparison of bacterial community structures in digestive tract between healthy and disease whiteleg shrimp (Litopenaeus vannamei) in Soc Trang, Vietnam

2018 ◽  
Vol 16 (3) ◽  
pp. 543-551
Author(s):  
Tran Trung Thanh ◽  
Nathan Bott ◽  
Le Hoang Duc ◽  
Dang Thi Hoang Oanh ◽  
Nguyen Trung Nam ◽  
...  
Keyword(s):  
Bacterial Community ◽  
16S Rrna ◽  
Litopenaeus Vannamei ◽  
Penaeus Monodon ◽  
Gut Bacteria ◽  
Shrimp Pond ◽  
Sequencing Method ◽  
Gradient Gel Electrophoresis ◽  
The Stability ◽  
Generation Sequencing

Gut bacteria comprise a complex bacterial community related to many functions in a host. The stability of gut bacteria plays important models in the health and immunology of a host. Many studies on intestine bacteria constructed via cultivation and Denaturation Gradient Gel Electrophoresis (DDGE) methods have proved a limited efficiency. In order to tackle these drawbacks, the next generation sequencing method was developed on 16S-rRNA-based sequences (Metabarcoding). The composition of bacterial communities was revealed based on the analysis of 16S rRNA sequences of intestine bacteria in Litopenaeus vannamei ponds in comparison with microbial communities in a Penaeus monodon pond and a muscle of shrimp. These results showed that the dominant phyla of intestine bacteria in Litopenaeus vannamei were Proteobacteria (49.3–57.4%), Firmicutes (15.6–34.4%) and Bacteroidetes (0.1–16.9%). Rhizobium(0.4%-26.1%), Vibrio(0–23.9%) and Spongiimonas(0–16,7%) were dominant genera in Litopenaeus vannamei gut. A higher proportion of Fusobacterium (10%), a shrimp pathogen group, was found in a disease shrimp pond (ST4) in comparison with a low growth shrimp pond (ST3) (0%) and a healthy shrimp pond (ST1) (0.6%). Vibrio was marked as shrimp pathogen genus accounted for 22.3% of total genera in ST4 in comparison with 2.4% in ST3 and 3.5% in ST1. Interestingly, a higher percentage of Vibrio rotiferianus (7.98%) was found in ST4 compared to ST3 (1%) and ST1 (0%). Fusobacterium and Vibrio will be the objects for the next experiments to discover shrimp pathogens specifically.

scholarly journals Probiotic modulation of the gut bacterial community of juvenile Litopenaeus vannamei challenged with Vibrio parahaemolyticus CAIM 170

2017 ◽  
Vol 43 (4) ◽  
pp. 766-775
Author(s):  
Irasema E. Luis-Villaseñor ◽  
Domenico Voltolina ◽  
Bruno Gomez-Gil ◽  
Felipe Ascencio ◽  
Ángel I. Campa-Córdova ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Litopenaeus Vannamei ◽  
Vibrio Parahaemolyticus ◽  
Single Strand Conformation Polymorphism ◽  
Positive Control ◽  
Negative Control ◽  
Rrna Gene ◽  
Protective Effects ◽  
Probiotic Treatment ◽  
Significant Difference

The protective effects of two probiotic mixtures was studied using the fingerprints of the bacterial community of Litopenaeus vannamei juveniles exposed to probiotics and challenged with Vibrio parahaemolyticus CAIM 170. Fingerprints were constructed using 16S rRNA gene and the PCR-SSCP (Single strand conformation polymorphism) technique, and the probiotics used were an experimental Bacillus mixture (Bacillus tequilensis YC5-2 + B. endophyticus C2-2 and YC3-B) and the commercial probiotic Alibio. The DNA for PCR-SSCP analyses was extracted directly from the guts of shrimps treated for 20 days with the probiotics and injected with 2.5×105 CFU g-1 of V. parahaemolyticus one week after suspension of the probiotic treatment. Untreated shrimps served as positive (injected with V. parahaemolyticus) and negative (not injected) controls Analysis of the bacterial community carried out after inoculation and 12 and 48 h later confirmed that V. parahaemolyticus was present in shrimps of the positive control , but not in the negative control or treated with the probiotic mixtures. A significant difference in the diversity of the bacterial community was observed between times after infection. The band patterns in 0-12 h were clustered into a different group from that determined after 48 h, and suggested that during bacterial infection the guts of whiteleg shrimp were dominated by gamma proteobacteria represented by Vibrio sp. and Photobacterium sp. Our results indicate that the experimental and the commercial mixtures are suitable to modulate the bacterial community of L. vannamei and could be used as a probiotic to control vibriosis in juvenile shrimp.

scholarly journals Fine-scale spatial patterns in bacterial community composition and function within freshwater ponds

2014 ◽  
Vol 8 (8) ◽  
pp. 1715-1726 ◽  
Author(s):  
Gavin Lear ◽  
Julia Bellamy ◽  
Bradley S Case ◽  
Jack E Lee ◽  
Hannah L Buckley
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Spatial Patterns ◽  
Bacterial Community Composition ◽  
Fine Scale ◽  
Freshwater Ponds ◽  
And Function

scholarly journals EFFECT OF POVIDONE IODINE TREATMENT ON BACTERIAL COMMUNITY ASSOCIATED WITH WHITE SHRIMP (LITOPENAEUS VANNAMEI) LARVAE

2009 ◽  
Vol 34 (2) ◽  
pp. 71-80
Author(s):  
Artini Pangastuti ◽  
Antonius Suwanto ◽  
Yulin Lestari ◽  
Maggy T. Suhartono
Keyword(s):  
Bacterial Community ◽  
Litopenaeus Vannamei ◽  
Fragment Length Polymorphism ◽  
Povidone Iodine ◽  
White Shrimp ◽  
Culturable Bacteria ◽  
Iodine Treatment ◽  
Eggs And Larvae ◽  
Number Of Bacteria ◽  
Total Bacteria

The efficacy of povidone iodine as a surface disinfectant was assessed in white shrimp (Litopenaeus vannamei) eggs and larvae. Eggs and nauplii were exposed to povidone iodine 20 ppm for 20 seconds. Culture-based method and Terminal Restriction Fragment Length Polymorphism (T-RFLP) were used to monitor the total number of bacteria and diversity of the bacterial community associated with shrimp eggs and larva at each developmental stage. Povidone iodine reduced the total culturable bacteria, especially Vibrio, on eggs and nauplii, as well as the total bacteria in the whole community as estimated by T-RFLP results. Povidone iodine also reduced the diversity of bacterial community and altered the evenness of phylotypes distribution suggesting that the use of povidone iodine as a surface disinfectant in shrimp aquaculture should be reconsidered.

scholarly journals Bacterial composition and inferring function profiles in the biofloc system rearing Litopenaeus vannamei postlarvae at a low salinity

2022 ◽  
Author(s):  
Hai-Hong Huang ◽  
Chao-Yun Li ◽  
Yan-Ju Lei ◽  
Wei-Qi Kuang ◽  
Wan-Sheng Zou ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Litopenaeus Vannamei ◽  
High Throughput Sequencing ◽  
Inorganic Nitrogen ◽  
Rrna Gene ◽  
Bacterial Composition ◽  
Low Salinity ◽  
Low Concentrations ◽  
Salinity Condition ◽  
Microbial Dna

This study aimed to investigate the bacterial composition and inferring function profiles in the biofloc system rearing Litopenaeus vannamei postlarvae (PL) at a low salinity condition. PL (~ stage 15) were stocked in four parallel tanks filled in water with a salinity of 5.0‰ at a density of 4000 individuals per m3 for a 28-days culture experiment, during which glucose was added as carbon source with a C:N of 20:1. At the end of experiment, water was sampled from each tank and pooled to extract microbial DNA for high-throughput sequencing of V3-V4 region of 16S rRNA gene. Results showed that the bacterial community at 28 d was dominated by phyla of Proteobacteria (45.8%), Bacteroidetes (21.1%), Planctomycetes (13.5%), Chlamydiae (10.3%) and Firmicutes (6.8%). A proportion of 81% inferring KEGG functions of this bacterial community associated with metabolism. Among functions relating to nitrogen metabolism, 48.5% were involved in the conversion of ammonia to glutamate, but the proportion of those involved in transformation among ammonia, nitrite and nitrate was 18.0% in total, inferring higher protein-synthesis but lower inorganic nitrogen-transformation capacities of the bacterial community. At the same time (28 d), high levels of total nitrogen (231.3±6.0 mg L-1) and biofloc (127.0±63.0 mL L-1), but low concentrations of ammonia (0.04±0.01 mg L-1), nitrite (0.2±0.1 mg L-1) and nitrate (12.9±2.5 mg L-1) were observed. The results supply a novel insight for understanding the function of bacterial community in the biofloc system nursing L. vannamei PL at a low salinity.

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