摘要
应用室内模拟实验方法,对疏浚作业后长江口悬浮物和溶出 Zn^(2+)对中华绒螯蟹产卵率和早期发育的影响进行了研究,结果显示:在疏浚作业所造成的极限底泥悬浮物浓度8 g/L,不会对中华绒螯蟹的交配、产卵和胚胎发育造成影响;当环境水 Zn^(2+)浓度超过197.8 μg/L 时,会对蚤状幼体的发育产生影响。
Dredging sediment in the Changjiang estuary,which has resulted in fine sediment suspending,may have effects on the larval development of Chinese crab Eriocheir sinensis.On the other hand,sediment suspend- ing may increase metal concentrations,especially Zn^(2+) in the estuarine environment and imperil marine life, such as the larval Eriocheir sinesis.This study showed that there were no significant differences in the spawn, egg survival,larval hatching and embryonic development of Chinese crab after exposure to the highest concentra- tion(8 g/L)suspending sediment and control environment.The result of the toxicity of Zn^(2+) to larvae demon- strated that after 24 h or 36 h exposure in the assay medium of Zn^(2+),especially the concentration of Zn^(2+) over 197.8 μg/L,the high mortality of larvae at different stages(zoea Ⅰ,zoea Ⅱ and zoea Ⅳ)was found,which demonstrated the toxicity of Zn^(2+) to the early larvae.
出处
《中国水产科学》
CAS
CSCD
1999年第5期24-28,共5页
Journal of Fishery Sciences of China
基金
农业部重点科研项目(渔95-B-96-10-01-0)
关键词
长江口
悬浮物
中华绒螯蟹
早期发育
产卵率
锌
Changjiang River
estuary
suspended dredging sediment
Zn^(2+)
Eriocheir sinensis
early development
