Chemical induction of settlement and metamorphosis in two Babylonia (Gastropoda) larvae |
| |
| Authors: | Ke Caihuan Li Shaojing Li Fuxue Zheng Zhon and Liu Weibin |
| |
| Institution: | 1.Department of Oceanography and Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China2.Fujian Fisheries Research Institute, Xiamen 361012, China |
| |
| Abstract: | By exposure to 12×10-3 mol/dm3 K+ for 24 h, more than 90% of planktonic larvae of Babylonia formosae and B.areolata were effectively induced to metamorphose completely.15×10-3mol/dm3 K+ exerted toxic effect on larval B.areolata over a 24 h period, but produced better results of induction by 12 h exposure.Metamorphosed juveniles induced by increased by K+ could move and feed normally.Percent metamorphosis increased with average shell height for K+-induced larvae.L-DOPA, epinephrine and norepinephrine ranging from 5.5×10-6 to 5.5×10-5 mol/dm3 had no inductive activity to metamorphosis in larval B.areolata,whereas the rate of metamorphosis induced by dopamine at a concentration of 10-4 mol/dm3 was approximately half less than that by 12×10-3 mol/dm3 K+.TEA (a K+-channel blocker) did not inhibit metamorphosis in the two Babylonia larvae by induction of K+.Based on the results of K+-induced experiments, it is preliminarily suggested that shell height of larvae achieving metamorphic competence was in the range of 860.2-1 009.8 pm for B.frmosae,and 849.6-956.0 pm for B.areolata.In addition, planktonic larvae of the two Babylonia had delayed metamorphosis. |
| |
| Keywords: | Chemical induction metamorphosis Babylonia formosae B areolata larva |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
