Comparative Analysis of Intestinal Microbiota in Wild, Domesticated, and Cultured .

The impact of the living environments on the intestinal microbiota of was studied by analyzing intestinal microbiota diversity, composition, and potential function among wild, domesticated, and cultured groups. The results showed that the fish living in the wild environment exhibited the highest alpha diversity of intestinal microbiota. Intestinal microbial communities in the three groups clustered by living environment, with domesticated and cultured groups showing higher similarity.

Toxicity of common biocides used in aquaculture to embryos and larvae of Brachymystax tsinlingensis Li.

Brachymystax tsinlingensis Li is a threatened fish species endemic to China. With the problems of environmental factors and seeding breeding diseases, it is important to further improve the efficiency of seeding breeding and the basis of resource protection. This study investigated the acute toxicity of copper, zinc and methylene blue (MB) on hatching, survival, morphology, heart rate (HR) and stress behaviour of B.

, a Potential Pathogen in Freshwater-Cultured Hybrid Sturgeon.

In July 2021, a disease with a high mortality rate broke out in freshwater cultured hybrid sturgeon in Zhengzhou, Henan Province. A dominant strain, H-701, was isolated from diseased fish; physiological changes in diseased fish were investigated and molecular identification, biochemical characterization, and pathogenicity and drug sensitivity tests of H-701 were performed. The 16S rRNA gene sequence of H-701 was 99.

Evaluation of the potential probiotic Bacillus subtilis isolated from two ancient sturgeons on growth performance, serum immunity and disease resistance of Acipenser dabryanus.

In the present study, we aimed to screen the potential probiotic Bacillus subtilis isolated from the gut of healthy fish using in vitro assays and to evaluate its effect on Dabry's sturgeon (Acipenser dabryanus) using in vivo feeding experiments. Among the isolates, B. subtilis BSth-5 and BSth-19 exhibited antimicrobial effect against four sturgeon-pathogenic bacteria, including Aeromonas hydrophila, A.

Population differentiation and genetic diversity of endangered Li between Yangtze River and Yellow River in China based on mtDNA.

Li, distributed scatteredly in Qinling Mountains of China, is an ideal material for studies of conservation and phylogeography. In the present study, the genetic variations and phylogeographical patterns of collecting from the Yangtze River ( = 30) and the Yellow River ( = 70) were compared based on 1082-1163 bp control region with partial tRNA and 912 bp cyt partial sequence of mtDNA. Analysis of variance indicated that a high proportion of the total genetic variance (96.