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引用本文:黄诚,陈勤,葛家春,孟文新.甲醛溶液对发头裸腹溞及其体表聚缩虫影响的试验.湖泊科学,1997,9(2):183-186. DOI:10.18307/1997.0214
Huang Cheng,Chen Qin,Ge Jiachun,Meng Wenxing.Study on The Toxicity of Formaldehyde Solution To Moina Irrasa and Zoothamnium sp.. J. Lake Sci.1997,9(2):183-186. DOI:10.18307/1997.0214
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甲醛溶液对发头裸腹溞及其体表聚缩虫影响的试验
黄诚, 陈勤, 葛家春, 孟文新
南京大学生物系, 南京 210093
摘要:
不同浓度的甲醛溶液对枝角类发头裸腹溞Moina irrasa的致毒效应以及对其体表附着的聚缩虫Zoothamnium sp.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.
关键词:  甲醛溶液  发头裸腹溞  聚缩虫  毒性
DOI:10.18307/1997.0214
分类号:
基金项目:江苏省科委攻关课题
Study on The Toxicity of Formaldehyde Solution To Moina Irrasa and Zoothamnium sp.
Huang Cheng, Chen Qin, Ge Jiachun, Meng Wenxing
Department of Biology, Nanjing University, Nanjing 210093
Abstract:
The results of the experiments in killing effect of formaldehyde solution on Moina irrasa and Zoothamnium sp. reveal that the relationship between the survial ration of M. irrasa and concen tration of formaldehyde solution can be expressed by the following equations:S1=-1.3770P+102.3333 {1-7 ≤ p ≤ 21.7}Treating for 12 hrs lnS1=-12.2331 lnp+41.9094 21. S2=-l.88lOp+102.2143 {1.2 ≤ p ≤ 20.8}Treating for 24 hrs lnS2=-12.2081 lnp+41.1970 {20.8 ≤ p ≤ 29.0} All the functions between the lethal ratio Zoothamnium sp. and concentration of formaldehyde solution are as follows:R1=4.2049p-13.5045(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 Zootham-nium 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. lmg/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%.
Key words:  Formaldehyde solution  Moina irrasa  Zoothamnium sp.  toxicity
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