ティラピアの消化管内に存在する好気性従属栄養細菌の計数・分離のための培地〔淡水養殖魚類の消化管内細菌に関する研究-1-〕

概要

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For the purpose of enumeration and isolation of aerobic bacteria in gastrointestine of Tilapia nilotica five different media (media A, B, C, D and E) were examined and selected. As criteria for the selection the number of developed colonies, genus diversity of grown bacteria and recovery of the isolates after repeated transfers were used. In the course of this study it was found that (1) bacterial number in contents or wall surface of the gastrointestine of the fish was not dependent on the composition of medium, (2) the dominant bacterial group detected from the contents and wall surface of post-intestine was Vibrio-Aeromonas, irrespective of medium comosition, (3) genus diversity of bacteria grown on media A, C and D was large as compared with medium B and E, (4) medium C gave the highest recovery after repeated transfers. Considering these data medium C was selected as the most suitable medium for further study.
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