전남 다도해 바다목장 비브리오속 세균의 계절적 분포
Seasonal Distribution of Vibrio spp. in the Jeonam Archipelago Marine Ranching Ground
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2006～2007년 전남 다도해 바다목장 내 9개 정점을 대상으로 표층수와 저층수에서 비브리오속 세균의 개체수를 측정하고, 군집의 종조성 및 우점종을 분석하였다. 계절별 비브리오속 세균의 개체수는 여름(2007년 6월) 표층수에서 5.4～93.2 cfu㎖-1, 저층수에서 1.0～53.1 cfu㎖-1로 4계절 중 가장 많이 검출되었으며, 해수온도가 낮은 겨울(2007년 1월)의 경우에는 1개 정점의 표층수에서만 0.2 cfu㎖-1의 비브리오속 세균이 검출되었다. 봄(2007년 4월) 조사에서 표층수는 0～11.9 cfu㎖-1, 저층수에서 0～8.3 cfu㎖-1, 가을(2006년 11월) 조사의 표층수는 0.1～21.4 cfu㎖-1, 저층수에서는 0～2.9 cfu㎖-1의 비브리오속 세균이 검출되었다. 비브리오속 세균 군집의 종조성은 V. parahaemolyticus, V. alginolyticus 및 V. cholerae non-01으로 조사되었으며, V. parahaemolyticus와 V. alginolyticus가 4계절 모두 분리되어 우점종으로 나타났다. V. alginolyticus는 수온이 낮은 겨울에도 대부분의 정점에서 분리되어 다른 비브리오속 세균에 비하여 온도에 덜 민감한 종인 것으로 조사되었다.
Abstract
Cell number of Vibrio spp. was examined for the surface and bottom sea water harvested from the 9 stations in the Jeonam Archipelago Marine Ranching Ground in 2006～2007. Species population composition and dominant species were analyzed as well. The largest number of Vibrio spp. was detected in summer (June, 2007) among the 4 seasons with the surface and bottom sea water samples of 5.4～93.2 cfu㎖-1 and 1.0～53.1 cfu㎖-1. respectively. In winter (January, 2007), Vibrio spp. was not detected at all except that one station from which 0.2 cfu㎖-1 of Vibrio spp. was counted in the surface sea water sample. Cell numbers were 0～11.9 cfu㎖-1 and 0～8.3 cfu㎖-1, respectively, in the surface and bottom sea water samples retrieved in spring (April, 2007), and the corresponding sea water samples in autumn(November, 2006) were contaminated with 0.1～21.4 cfu㎖-1 and 0～2.9 cfu㎖-1, respectively. Species population composition of Vibrio spp. was found to be V. parahaemolyticus, V. alginolyticus and V. cholerae non-01 among which V. parahaemolyticus and V. alginolyticus were dominant in all seasons. V. alginolyticus was detected from all stations even in the winter season indicating that this species seems to be less temperature dependent than the other Vibrio spp..
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