摘要
采用人工配制不同浓度铅(Pb2+)(分别为0,0.7,1.4,14,70mg·L-1)培养液,研究铅对花背蟾蜍(BuforaddeiStrauch)受精卵出膜及蝌蚪生长的影响.其结果表明,铅对花背蟾蜍受精卵出膜时间影响不大(P>0.05),出膜率与Pb2+浓度呈显著负相关(P<0.01).与对照组相比,染毒组的蝌蚪死亡率和畸形率大大增加,其中肌肉感应期对Pb2+最为敏感,因畸形而导致蝌蚪运动能力丧失、对外界刺激反应迟钝、进食少也是蝌蚪死亡的主要原因之一.在一定浓度范围内,铅对蝌蚪生长(测量指标包括体重、尾宽、尾长、体长)有明显的抑制作用.
The current study investigates the toxic effects of lead on the hatching of Bufo raddei Strauch spawns and on the development of tadepoles cultured in the artificial aqueous solutions containing different concentrations of lead (Pb+{2+}).The result show that lead has little influence on the hatching time of the Bufo raddei spawn (P>0.05)and there is well negative co|relation between hatchability and Pb2+ concentration (P<0.01).However, in contrast with the control group, the rate of death and maformation of tadpoles in treatment groups increased greatly. It was found that tadpoles were quite sensitive to Pb2+during sens stage. That is that element lead in some concentrations can restraint distinctly the development of tadpoles (weight, width of tail, length of tail and body)
出处
《甘肃科学学报》
2004年第2期47-49,共3页
Journal of Gansu Sciences
基金
甘肃省自然科学基金(ZS021-A25-102-Y)
关键词
铅
花背蟾蜍
出膜率
蝌蚪
毒性
lead
Bufo raddei
hatching rate
tadpole
toxicity
