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Distribution of Vibrio halioticoli around an Abalone-farming Center in Japan

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Title: Distribution of Vibrio halioticoli around an Abalone-farming Center in Japan
Authors: Tanaka, Reiji Browse this author
Sawabe, Tomoo Browse this author →KAKEN DB
Yoshimizu, Mamoru Browse this author →KAKEN DB
Ezura, Yoshio Browse this author →KAKEN DB
Keywords: abalone
Vibrio halioticoli
Issue Date: Mar-2002
Publisher: Japanese Society of Microbial Ecology
Journal Title: Microbes and Environments
Volume: 17
Issue: 1
Start Page: 6
End Page: 9
Publisher DOI: 10.1264/jsme2.2002.6
Abstract: Vibrio halioticoli is the dominant bacterial species in the gut of abalone, Haliotis discus hannai. The bacterium may contribute to the digestion of seaweed, and form a symbiotic association with the host. However, the process by which the bacterium colonizes the gut of abalone is unknown and intriguing given the non-motile nature of V. halioticoli. To clarify the colonization process, the distribution of the bacterium in seawater, as well as the fecal material and diet of abalone was investigated at an abalone farm. Viable bacterial counts of V. halioticoli were determined in each sample using a colony hybridization technique specifically designed for the bacterium. The count in seawater and culture seawater was 3 CFU/ml. The number of V. halioticoli in a diatom bed used as a diet for juvenile abalone was 7.9×10^2 CFU/g. Fractionation of the diatom bed sample using 0.2 and 8.0-μm filters indicated that the viable count was higher in the attached fraction (3.4×10^2 CFU/g; >8.0 μm) than in free-living fraction (76 CFU/g; 0.2 μm-8.0 μm). Furthermore, viable V. halioticoli was estimated to be 3.6×10^3 CFU/g in the fecal material of juvenile abalone which had ingested diatoms, as compared to 1.2×10^5 CFU/g in that of juveniles fed on artificial diet. These results suggest that V. halioticoli cells in seawater and/or on diatoms contribute to the colonization of the gut in abalone.
Rights: 日本微生物生態学会 (Japanese Society of Microbial Ecology)
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 澤辺 智雄

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