摘要
长江口疏浚土悬沙对中华绒螯蟹蚤Ⅰ、蚤Ⅳ和大眼幼体发育和变态影响为:不同悬沙浓度对各期幼体成活率无显著影响,对蚤Ⅳ和大眼幼体的发育和变态亦无显著影响,但会推迟蚤Ⅰ蜕皮变态。水体中的悬沙对中华绒螯蟹蚤Ⅰ幼体生长和变态的影响与幼体此时的摄食习性(被动摄食)和摄食颗粒大小有关。
Effects of dredging suspended sediment on larval(zoea and megalopa)development and molt of Chi- nese crab E.sinensis were studied.The concentrations of suspended dredging sediment are 0,2,4,8,16,32, and 64 g/L in the experiment.The result shows that with the increase of sediment concentration(especially>8 g/L),the molt cycle of zoea I was postponed compared with controlled, but no effects on the development and molt of zoea IV and megalopa were found.This different effects on early larva and later larva may be resulted from the difference of feeding modes and food-size selectivity.
出处
《中国水产科学》
CAS
CSCD
1999年第5期20-23,共4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
河口
疏浚悬沙
中华绒螯蟹
变态
幼体发育
Changjiang River
esturary
suspended dredging sediment
Eriocheir sinensis
larva
survival rate
metamorphic rate
