| Ke Caihuan,Li Shaojing,Li Fuxue,Zheng Zhon,Liu Weibin. 2000. Chemical induction of settlement and metamorphosis in two Babylonia (Gastropoda) larvae. Acta Oceanologica Sinica, (1):59－67 |
| Chemical induction of settlement and metamorphosis in two Babylonia (Gastropoda) larvae |
| Chemical induction of settlement and metamorphosis in two Babylonia (Gastropoda) larvae |
| Received:October 20, 1997 Revised:March 05, 1999 |
| DOI： |
| Key words:Chemical induction metamorphosis Babylonia formosae B.areolata larva |
| 中文关键词: Chemical induction metamorphosis Babylonia formosae B.areolata larva |
| 基金项目: |
| Author Name | Affiliation | | Ke Caihuan | Department of Oceanography and Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Li Shaojing | Department of Oceanography and Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Li Fuxue | Department of Oceanography and Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Zheng Zhon | Department of Oceanography and Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Liu Weibin | Fujian Fisheries Research Institute, Xiamen 361012, China |
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| 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. |
| 中文摘要: |
| 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. |
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