This paper intends to study the impact of the cupric ions and mercuric ions at different concentration and the high-concentration mixture of copper and mercury on survival,behavior and ponderal growth of tadpoles of Quasipaa spinosa. The results showed that heavy metal ions at different concentration might result in different biological effects on the tadpoles. In 7-day stress treatment and 7-day recovery,out of the 10 treatment groups,only the tadpoles in CuHg-1.25 (mixture of 1.25 mg/mL cupric ion and 1.25 mg/mL mercuric ion)and Hg-0.25 (mercuric ion concentration being 0.25 mg/mL)groups showed high percentage of death. The consecutive observation in the period of stress treatment and recovery indicated that the heavy metal would change the behavior of the tadpoles,such as increased sensitivity to noise, clustering and toxic symptom of the tadpole with small body and weak swimming. On the seventh day of stress treatment and the seventh day of recovery, body weight of the tadpoles in Cu-0.05 (cupric ion concentration being 0.05 mg/mL)treatmentgroup was significantly heavier than that of the control group, indicating that addition of necessary trace element of copper may boost development of the tadpole.%实验研究不同浓度的铜离子和汞离子以及高浓度的铜汞联合对石蛙蝌蚪存活、行为和体重增长的影响,结果表明不同浓度的重金属离子对蝌蚪产生不同的生物学效应.在胁迫7d和恢复7d内,10个处理组中只有CuHg-1.25(水体中铜和汞离子浓度均为1.25 mg/mL)和Hg-0.25(汞离子浓度0.25 mg/mL)处理组的蝌蚪出现较大死亡.胁迫及恢复期间的连续观察表明重金属会改变蝌蚪的行为,如加大蝌蚪对噪音躁动的敏感、产生群集现象、导致体型瘦小和游动能力弱等中毒症状.在胁迫第7天和恢复第7天,Cu-0.05(铜离子浓度0.05 mg/mL)处理组蝌蚪的体重都显著高于对照组,说明水体中加入微量的铜元素可促进蝌蚪的生长.
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