镉对中国林蛙蝌蚪生长发育的毒性效应

生态学杂志

镉对中国林蛙蝌蚪生长发育的毒性效应

黄敏毅^1，2；张育辉¹

¹陕西师范大学生命科学学院，西安 710062；²安庆师范学院，安庆 246011

收稿日期:2005-09-28 修回日期:2005-12-08 出版日期:2006-05-10 发布日期:2006-05-10

Toxic effects of cadmium on Rana chensinensis tadpole growth and development

HUANG Minyi^1,2;ZHANG Yuhui¹

¹College of Life Science,Shaanxi Normal University,Xi'an 710062, China；²Department of Life Science,Anqing Teachers College,Anqing 246011, China

Received:2005-09-28 Revised:2005-12-08 Online:2006-05-10 Published:2006-05-10

摘要/Abstract

摘要： 将中国林蛙（Rana chensinensis）蝌蚪分别暴露于加Cd²⁺的自来水和去离子水中，统计得出24、48、72和96 h的半数致死浓度（LC₅₀）、全致死浓度（LC₁₀₀）、零致死浓度（L_C0）和安全浓度（SC）。结果表明，随着Cd²⁺浓度的升高和染Cd²⁺时间的延长，蝌蚪的死亡率增高，Cd²⁺加入去离子水中对蝌蚪的毒性比在自来水中更强。另外，将26～27期林蛙蝌蚪饲养在含Cd²⁺ 0.05、0.1、0.2和0.4 mg·L^-1的自来水中直至完全变态，通过对完全变态所需时间、平均体重和长度增长率的测定，研究在SC以下Cd²⁺对林蛙蝌蚪胚后发育的影响。随着Cd²⁺浓度的升高，蝌蚪的平均体重和长度的增长率降低，完全变态所需时间增长。说明Cd²⁺污染在SC以下仍可抑制中国林蛙蝌蚪的生长发育，延缓变态。

关键词: 人工绿洲, 潜在格局, 现实格局

Abstract: In this study,Rana chensinensis tadpole was exposed to Cd²⁺containing tap water and deionized water,and the 50% lethal concentration (LC₅₀),100% lethal concentration (LC₁₀₀),0% lethal concentration (LC₀),and safe concentration (SC) at 24,48,72 and 96 h were determined.The results showed that the death rate of R.chensinensis tadpole increased with Cd²⁺ concentration and time,and the toxicity of Cd²⁺ was stronger in deionized water than in tap water.After put the tadpoles of stage 26-27 in the tap water under Cd²⁺ safe concentration (0.05,0.1,0.2,0.4 mg·L^-1),the increment of their average weight and length was decreased with increasing Cd²⁺ concentration,and the duration for heteromorphosis became longer,indicating that even under Cd²⁺ safe concentration,the growth and metamorphosis of R.chensinensis tadpole could be still delayed and disturbed.

Key words: Artificial oases, Potential pattern, Actual pattern

黄敏毅；张育辉 . 镉对中国林蛙蝌蚪生长发育的毒性效应[J]. 生态学杂志.

HUANG Minyi^1,2;ZHANG Yuhui¹. Toxic effects of cadmium on Rana chensinensis tadpole growth and development[J]. cje.

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