Genetic diversity of members of the genus Acinetobacter (Proteobacteria) from the intestine of Baikal omul Coregonus migratorius (Georgi, 1775)

Abstract

For the first time, we analyzed genetic diversity of members of the genus Acinetobacter (Moraxellaceae, Pseudomonadales, and Gammaproteobacteria) in the intestinal microbial communities of Baikal omul from the Selenga population. The entire data array obtained through high-throughput sequencing contained 2.9% of the 16S rRNA gene sequences (18 amplicon sequence variants) belonging to the genus Acinetobacter. Phylogenetic analysis revealed that the used 16S rRNA gene fragment did not resolve the taxonomic identification to species level. Despite the formation of stable clusters, they contained different species of the genus. The presence of opportunistic species, such as A. lwoffii, A. johnsonii, and A. pittii, among the detected Acinetobacter and the absence of signs of disease in fish indicates favorable environmental parameters of the Baikal omul habitat on the wintering grounds in the pelagic zone of Lake Baikal.