Halophilic Vibrios in the waters of Xiamen Harbor and Daya Bay

The distribution features, species composition end seasonal variation of halophilic Vibrios in 7 stations of Xiamen Harbor and 9 stations of the Daya Bay were studied.The counts of Vibrios were analyzed with the most probable number (MPN) technique.The media TCBS was used to isolate Vibrios, and API20E system employed to identify the Vibrios.The results reveals that the density of Vibrios in the Daya Bay ranged from 30.0×10⁵ to 2.4×10⁵ cell·dm^-3 and the average density was 6.61×10³ cell·dm^-3, and that in Xiamen Harbor was 2.3×10²-2.4×10⁵ cell·dm^-3 and 7.8×10³ cell·dm^-3 on the average.The number of Vibrios varied seasonally with the water temperature, and was higher in the summer than in the autumn.The Vibrio species in the two bays mainly included Vibrio alginolyticus, V.parahaemolyticus, V.fluvialis, V.tralnificus, V.mimicus and V.metshnikovii and V.alginolyticus was the predominant species.