塔玛亚历山大藻对栉孔扇贝胚胎和早期幼虫的影响.pdf

22 2 Vol. 22, No.2 2002 3 ACTA SCIENTIAE CIRCUMSTANTIAE Mar. , 2002 :2002 : X503. 2 : A 颜 天, 傅 萌, 王云峰, 于仁诚, 李 钧, 周名江 ( , 266071) : Al ex andrium tamarense ( ATHK) Chlamy sf arreri D . , 100 500 cellsmL , 36 h , 30% 5% . , , ATCI02 . . . 3000 cellsmL , D ,5 000 cellsmL 20d 10 000 cellsmL 14d , D 0. S . : ; ; S ; The effects of the dinoflagellate of Alexandrium tamarense on early devel opment of Chlamy sf arreri YAN Tian, FU Meng, WANG Yunfeng, YU Rencheng, LI Jun, ZHOU Mingjiang ( Instituteof Oceanology, The Chi neseAcademy of Sciences, Qingdao 266071) Abstract:The inhibition of the dinoflagellate Alex andrium tamarense on the fereilized egg hatching success and larval survival of the scallop ( Chl amysf erreri) was studied. The hatchingrateof C. f arreri was only 30% when the fertilized eggswere exposedfor 36 hours to A . t ama rense cells at a concentration of 100 cellsmL, and further dropped to 5% with the concentration of 500cellsmL. There was no such effects when thefertilizedscallop eggs exposed to othertwo algal species, thediatom Phaeodactylum tricornutum andraphidophyteH eterosigma carter ae . The alga at early exponential stage had the strongest effect on egg hatching and algal toxin( s) influenced the developmental stagebefore blastulamost sensitively. The alga also deliriously influenced the larvae at early Dshape stageof the scallop. The survival ratebegan to de crease significantly after exposed for 6 days at concentration of 3000cellsmL and above; no larvae could survive after 14 day exposureto A . tamarense at 10 000 cellsmL or 20 day at 5000cellsmL. As S