饥饿对中华绒螯蟹(Eriocheir sinensis)幼体发育的影响  

Effects of starvation on development of zoea larvae of the Eriocheir sinensis

作　　者：刘健晖[1] 金春华[2] 李爱芬[1] 

机构地区：[1]暨南大学水生生物研究所,广州510632 [2]宁波大学生命科学与生物工程学院,宁波315211

出　　处：《生态科学》2005年第1期15-17,共3页Ecological Science

基　　金：上海市科技攻关项目013212002;浙江省教育厅资助项目20040895

摘　　要：对刚孵化的中华绒螯蟹第一期的蚤状幼体经不同时间的饥饿后再投喂,发现饥饿可以明显降低幼体的存活率和延长幼体的发育期。实验表明:对中华绒螯蟹第一期的蚤状幼体的饥饿时间(t)和发育期长(D)呈线性关系(D=4.6303+1.3226t r=0.970p<0.01)。对于中华绒螯蟹第一期的蚤状幼体,当起始饥饿时间超过了4d,再予以投饵,幼体均不能恢复正常的发育和蜕皮功能,得出中华绒螯蟹的不可恢复点(the point of no-return,PNR)大约为4d。通常以产生50%的幼体死亡的饥饿期即PNR50,来表明幼体对饥饿的抵抗能力,实验得出中华绒螯蟹第一期的蚤状幼体的PNR50大约为48h。Effects of different starvation duration on survival rate and development of zoeaⅠ larvae of Chinese mitten handed crab,Eriocheir sinensis,were studyed. The results showed that starvation can significantly decrese the survival rate of the larvae and prolong the development time. A positive relationship(D=4.6648+1.3344t γ=0.978 p<0.01)between the starving time(t) and the larval development time(D) was observed. As to the zoea of Chinese mitten handed crab, if the duration of starvation exceeds 4 d, the larvae cannot recover from starvation and have normal development and exuviate function. So the point of no-return (PNR) for Chinese mitten handed crab is ~ 4 d, and PNR50 , another indicator for the resistance of the larvae to starvation, is ~ 48h. The results suggested that in the commercial rearing of larvae of the crab, efforts should be made to fed larvae as soon as possible after the hatching.

关 键 词：中华绒螯蟹 饥饿 蚤状幼体 发育 蜕皮 

分 类 号：Q175[生物学—水生生物学]