甲醛溶液对发头裸腹溞及其体表聚缩虫影响的试验  

STUDY ON THE TOXICITY OF FORMALDEHYDE SOLUTION TO MOINA IRRASA AND ZOOTHAMNIUM SP

作　　者：黄诚[1] 陈勤[1] 葛家春[1] 孟文新[1] 

机构地区：[1]南京大学生物系,南京210093

出　　处：《湖泊科学》1997年第2期183-186,共4页Journal of Lake Sciences

基　　金：江苏省科委攻关课题

摘　　要：不同浓度的甲醛溶液对枝角类发头裸腹溞Moinairrasa的致毒效应以及对其体表附着的聚缩虫Zoothamniumsp．的杀灭效果的试验结果表明，12h、24h两个作用时段中，甲醛浓度与发头探腹溞相对存活率之间以及甲醇浓度与发头裸腹溞表聚缩虫营养体脱落率之间存在一定的函数关系．在确立上述函数基础上，可得出控制聚缩虫感染的两种有效方法：①在保证溞存活率不低于66％的情况下，选用最低有效浓度（19．mg／kg）的甲醛溶液作用24h可杀灭100％聚缩虫；②在保持溞存活率较高（70％－90％）的情况下，选用相应浓度的甲醛液作用24h杀灭87％－29％聚缩虫，并辅以更换新水等措施，也可将聚缩虫感染的危害控制在一定的范围内．The results of the experiments in killing effect of formaldehyde solution on Moha irrasa and Zoothamnium sp. reveal that the relationship between.the survial ration of M. ha and concen tration of formaldehyde solution can be expressed by the following equations: Treating for 12 hrs Treating for 24 hrs All the functions between the lethal ratio Zoothamwhm sp. and concentration of formaldehyde solution are as follows:R1 = 4. 2049p- 13. 5o45 (treating for 12 hrs)R2= 5. 4960p- 7. 0833(treating for 24 hrs)In the paper,two effective measures are given to control the infection of Zoothamnium sp.:(1 ) By using 13 mg/L formaldehyde solution (treating for 12 hrs),it can kill almost all Zoothammum sp. and,at the same time, keep the survival ratio of the water fleas at the level of 66%;(2) By using 6. 5 - 17. 1mg/L formaldehyde solution (treating for 24 hrs) ,it can kill 29% -87% of Zoothamnium sp. and keep the survival ratios of the water fleas correspondingly at 90%- 70 %.

关 键 词：甲醛溶液 发头裸腹溲 聚缩虫 毒性 枝角目 

分 类 号：Q959.223.1[生物学—动物学]