摘要
在水温 16～ 18℃的野外条件下 ,采用单因子急性毒性实验法 ,研究了水环境中pH、盐度和碱度对中国林蛙 (Ranachensinensis)变态蝌蚪的毒性效应 .结果表明 ,中国林蛙变态蝌蚪对 pH的适应范围为4 3～ 9 7,最低耐受限 3 6 ,最高耐受限 10 7;对盐度的最高耐受限为 9 98g·L-1,适应盐度上限 7 14 g·L-1,安全盐度上限 1 70g·L-1;对碱度的最高耐受限为 19 96mmol·L-1,适应碱度上限 8 76mmol·L-1,安全碱度上限 2 4 1mmol·L-1.野外变态蝌蚪饲养池水体 pH应控制在 6 5～ 8 5 ,盐度控制在 2 0 g·L-1以下 ,碱度不超过 4 0mmol·L-1.中国林蛙变态蝌蚪是一种狭酸碱、低耐盐、低耐碱生物 .
Under field condition with 16～18℃ water temperature,single-factor acute toxicity test was used to study the toxicity effects of water pH,salinity and carbonate-alkalinity on abnormal tadpole (R.chensinensis).The results showed that when the water salinity was 0.18 g·L -1 ,carbonate-alkalinity was 1.41 mmol·L -1 ,and water pH was 4.3～9.7,the survival rate of abnormal tadpole within 96 hours was not affected.The upper limit of LC_ 50 for the pH within 24,48,72 and 96 hours was 10.33,10.18,10.08 and 10.02,and the prescribed minimum was 3.92,4.07,4.11 and 4.16,respectively.The upper limit of LC_0 was 9.95,9.80,9.70 and 9.70,and the prescribed minimum was 4.23,4.45,4.30 and 4.30,and that of LC_ 100 was 10.70,10.55,10.45 and 10.33,and the prescribed minimum was 3.55,3.70,3.92 and 4.03,respectively.The survival rate of abnormal tadpole within 96 hours was not affected in the water salinity between 2.0～3.0 g·L -1 .When water pH was 7.0～8.5 and carbonate-alkalinity was 1.41mmol·L -1 ,the LC_ 50 of the salinity within 24,48,72 and 96 hours was 8.21,7.25,5.17 and 3.70 g·L -1 ,the LC_0 was 7.14,6.00,2.67 and 2.20 g·L -1 ,and the LC_ 100 was 9.98,9.00,7.67 and 5.20 g·L -1 ,respectively,while the SC was 1.70 g·L -1 .Under the same water pH and when the water salinity was 0.18 g·L -1 ,the LC_ 50 of carbonate-alkalinity within 24,48,72 and 96 hours was 14.36,11.83,10.35,and 7.68 mmol·L -1 ,the LC_0 was 8.76,8.51,4.65 and 3.88 mmol·L -1 ,and the LC_ 100 was 19.96,15.14,16.05 and 11.48 mmol·L -1 ,respectively,while the SC was 1.70 mmol·L -1 .The survival rate of abnormal tadpole (R.chensinensis) was decreased with increasing water pH,salinity and carbonate-alkalinity.The optimum water salinity and carbonate-alkalinity to the survival and the growth of abnormal tadpole (R.chensinensis) were below 2.0 g·L -1 and 3.0 mmol·L -1 ,respectively,and water pH was between 6.0 and 9.0.
出处
《应用生态学报》
CAS
CSCD
2004年第8期1411-1415,共5页
Chinese Journal of Applied Ecology
基金
国家"九五"科学技术攻关项目 ( 96 0 0 4 0 2 0 9)
中国科学院知识创新工程资助项目 (KZCX1 Y CA 0 7)
关键词
中国林蛙
变态蝌蚪
PH
盐度
碱度
适应性
Rana chensinensis, Abnormal tadpole, pH, Salinity, Alkalinity, Adaptability.
