鲍养殖环境中弧菌密度变化及其与环境因子的关系

Density variation of Vibrio in ablone aquaculture water and its relationship with environmental factors

采用培养法对皱纹盘鲍（Haliotis discus hannai）养殖水体中的弧菌（Vibrio）密度进行了测定,监测了主要环境因子（水温、溶解氧、p H、盐度、氧化还原电位、亚硝酸盐、硝酸盐、氨盐、磷酸盐）,并探讨了弧菌密度与环境因子的关系。结果表明,养殖水中弧菌密度全年变化范围为0.2×102~6.0×103cfu·m L-1,平均为1.7×103cfu·m L-1。水温≤25℃时弧菌密度与各环境因子均无相关性。水温〉25℃时弧菌密度与水温显著相关（P〈0.05）,与氧化还原电位、硝酸盐、氨盐极显著相关（P〈0.01）,与其他环境因子相关性不明显。

We measured the Vibrio density in aquaculture water of Haliotis discus hannai by cultivation method, and investigated the main environmental factors including temperature, dissolved oxygen, potential of hydrogen, salinity, redox potential, nitrite, ni- trate, ammonium and phosphate, so as to study the relationship between Vibrio quantity and main environmental factors. The results show that Vibrio density throughout the whole year varied from 0. 2 × 102 cfu .mL-i to 6. 03 × 103 cfu .mL-1 （average 1.7 × 103 cfu. mL-1）. When the temperature was less than or equal to 25 ℃, the Vibrio density had no correlation with any environmental factor; when the temperature was greater than 25 ℃, the Vibrio density had significant correlation with temperature （P 〈 0. 05）, redox potential （P 〈 0. 01 ）, nitrate （ P 〈 0. 01 ） and ammonium （ P 〈 0. 01 ）, but had no correlation with the others.