马丽;吴民耀;王宏元;

• 1:陕西师范大学秦巴山区可持续发展协同创新中心

摘要(Abstract)：

为评估Cu2+,Hg2+,Cr6+,Cd2+,Li+,Al3+和Co2+7种金属离子对中国林蛙(Rana Chensinensis)和中华大蟾蜍(Bufo gargarizans)蝌蚪的急性毒性效应,采用生物毒性试验方法对中国林蛙和中华大蟾蜍36期蝌蚪,进行上述7种金属离子的急性毒性试验,分别测定了这7种金属离子对中国林蛙蝌蚪和中华大蟾蜍蝌蚪的半数致死浓度(LC50)。此外,分析了中国林蛙和中华大蟾蜍36期蝌蚪的肥满度、肝指数等形态指标。结果显示,Cu2+、Hg2+、Cr6+、Cd2+、Li1+、Al3+、Co2+对中国林蛙蝌蚪的96h-LC50分别为0.270 mg·L-1、0.803 mg·L-1、2.375 mg·L-1、7.351 mg·L-1、11.273 mg·L-1、17.265 mg·L-1和20.973 mg·L-1。对中华大蟾蜍蝌蚪的96 h-LC50分别0.593 mg·L-1、0.593 mg·L-1、2.827 mg·L-1、2.592 mg·L-1、12.656 mg·L-1、14.020 mg·L-1和57.435 mg·L-1。中国林蛙蝌蚪对Cu2+、Cr6+、Li+、Co6+4种金属离子的敏感性相对较高,而中华大蟾蜍蝌蚪对Hg2+、Cd2+、Al3+3种金属离子的敏感性相对较高。形态指标的差异是中国林蛙与中华大蟾蜍蝌蚪对同一金属离子敏感性差异的原因之一。

关键词(KeyWords)： 中国林蛙蝌蚪;中华大蟾蜍蝌蚪;金属离子;LC50

Abstract:

Keywords:

基金项目(Foundation): “秦巴山区可持续发展协同创新中心”资助

作者(Author): 马丽;吴民耀;王宏元;

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