斗门地区养殖水源细菌数量的变化动态

细菌是水体生物群落中的重要组成部分 ,在水生态系统的物质循环中起着重要的作用 ,水环境中的各种因素也直接或间接地影响着细菌的数量和分布。对养殖生产来说 ,有不少细菌是养殖动物的病源 ,因此 ,水体细菌量的变化可作为反映水环境及水质变化的一个指标7] 。斗门地区地处珠江口西岸 ,是广东省珠海市主要的水产养殖区 ,其养殖水源为河水和地下咸水。本文研究流经斗门地区的螺洲河及地下咸水蓄水池中水体异养细菌的数量变化 ,为了解该地区养殖水源水质变化提供依据。1　材料与方法1 1　调查站位和时间根据调查的需要设 2个水样采样站位 ,每…

Variations of Baterial Population Size in Water Sources for Aquaculture of Doumen County

Biotechnology, Jinan University, G-uangzhou 510632), Zhu Jianhong (Giant Freshwater Shrimp Breed Multiplication Farm of Doumen , Zhuhai 519100). Chinese Journal of Ecology, 2002,21 (6) :65 ～67.Microbiological survey in the Luozhou River and a pond of Doumen County Guangdong Porvina from March to July in 2001 provided the data for study in the variations of heterotrophic bacteria and vibrio population size with some environmental factors. The results showed that heterotrophic bacteria and vibrio population densities in Luozhou River and pond increased with water temperature. But when COD increased, these densities in the pond appeard to decline. The popula tion densities of heterotrophic bacteria in Luozhou River and pond ranged from 2300cells@ ml-1 to 9.7 × 104 cells@ ml- 1,and those of vibrio ranged from 800 cells@ ml-1 to 1.97 × 104 cells@ ml-1.