摘要
以水温、盐度、pH、COD、NH3-N为环境因子 ,以哈维氏弧菌 (Vibroharveyi)感染日本对虾 (Penaeusjaponicus)仔虾 ,试验进行 3d。结果表明 ,水温、盐度、pH和COD对发光细菌的生长和日本对虾仔虾的感染死亡率具有明显的促进作用。在水温 30℃ ,盐度 32 .8,pH 7.6 4和COD 10 .2mg/L时 ,发光细菌在试验结束时的数量比初始时分别增加了 11.2倍 ,6 .5倍 ,6 .2倍和 7.9倍 ;日本对虾仔虾的死亡率比对照组分别增加了 6 0 % ,4 5% ,4 3%和 50 %。NH3-N对发光细菌的促生长作用不明显 ,但其质量浓度 1.2～ 1.6mg/L时 ,能增加日本对虾仔虾对发光病的感染率和死亡率。
Water temperature, salinity, pH, COD, NH 3-N were regarded as the environmental factors and the bacterium Vibro harveyi was used to infect Penaeus japonicus for 3 d. The results show that water temperature, salinity, pH and organic matters have obvious enhancement effect on the growth of V.harveyi and lead to higher mortality of P.japonicus with any one of the factor levels going up. When water temperature 30℃, salinity 32.8, pH 7.64 and COD 10.2 mg/L, the bacteria densities of V.harveyi at the end of the experiment is higher by 11.2, 6.5, 6.2 and 7.9 times, respectively,than those at the beginning and the mortalities of P.japonicus in the corresponding groups are increased by 60%, 45%, 43% and 50%, respectively. NH 3-N has no obvious effect on growth of V.harveyi, but when its concentration is between 1.2 and 1.6 mg/L,the mortality and V.harveyi infected rate of P.japonicus can be heightened.
出处
《中国水产科学》
CAS
CSCD
北大核心
2001年第1期41-45,共5页
Journal of Fishery Sciences of China
基金
福建省海洋与渔业局资助项目!( 92 70 3 )
关键词
环境因子
发光细菌
生长
日本对虾
仔虾
死亡率
育苗
水质
environmental factor
Vibro harveyi
growth
Penaeus japonicus
post larva
mortality
