Microbiological Studies on the Decomposition of Chitin in Marine Environment-VI:Chitinoclastic Bacteria in the Digestive Tracts of Whales from the Antarctic Ocean

概要

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The bacteriological samples of gastrointestinal contents from the whales in the Antarctic Ocean stored at -5° and -20° respectively were examined. The number of heterotrophic bacteria in the gastrointestinal contents of baleen whales stored for 4 to 5 months at -5° were from 105 to 106 cells per ml of stomach contents, and from 103 to 106 cells per ml of intestinal contents. In the samples stored at -20° bacteria in the stomach contents were generally more than that in the intestinal contents. On the other hand, no marked difference in the bacterial population between the two samples was seen in samples stored at -5°. As the chitinoclastic bacteria that survive at low freezing temperature can be detected only in the stomach contents, the bacterial flora of stomach and intestines of the same whale in the Antarctic Ocean may be different.
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