Molecular analysis of the 16S rDNA of the intestinal microbiota of whiteleg shrimp Litopenaeus vannamei was examined to investigate the effect of a Bacillus mix (Bacillus endophyticus YC3-b, Bacillus endophyticus C2-2, Bacillus tequilensisYC5-2) and the commercial probiotic (Alibio(®)) on intestinal bacterial communities and resistance to Vibrio infection. PCR and single strain conformation pol...

abstractthe monitoring of the management of vannamei shrimp farms in the gomishan shrimp site in the best way and to its development. the objectives of the project were the calculation of growth indices, food conversion ratio.the final production of vannamei, benefit-cost or gross benefit of each farm.this study carried out in in 1391( 2012 ).data collection done through questionaries personall...

this research aimed to assess factors of water quality in ponds l. vannamei in site of bushehr helle and provide solutions to improve water quality shrimp l. vannamei were conducted in this area, during the period of 120 days. this studies was conducted across the 7- hectare pond with a density of 22 shrimp per square meter in breeding site of bushehr helle in 2013. from parameters of water oxy...

Antimicrobial susceptibility pattern was determined in 100 strains of Vibrio isolated from the Litopenaeus vannamei shrimp and identified phenotypically. A high antibiotic-resistance index (75%) was observed, with the following phenotypic profiles: monoresistance (n = 42), cross-resistance to β-lactams (n = 20) and multiple resistance (n = 13). Plasmid resistance was characterized for penicilli...

To investigate the immune defense mechanism of Litopenaeus vannamei (L. vannamei) exposed to high concentration environmental ammonia-N, PacBio full-length transcriptome and Illumina sequencing were performed. After ammonia-N exposure, 24,763 32,132 transcripts obtained, while 4465 3022 new genes annotated at 0 6 h after compared L. whole genome, respectively. Besides, haemocytes transcriptomes...

An 8-week feeding trial was conducted to investigate the effects of dietary mannan oligosaccharide (MOS) on growth performance, gut morphology, and NH(3) stress tolerance of Pacific white shrimp Litopenaeus vannamei. Juvenile Pacific white shrimp (1080 individuals with initial weight of 2.52 ± 0.01 g) were fed either control diet without MOS or one of five dietary MOS (1.0, 2.0, 4.0, 6.0 and 8....