中文摘要：

海鞘类动物 Styela 罐头作品 Savigny 的幼虫与测试导致或禁止幼虫的解决和变形的这些混合物的能力的肾上腺素，新肾上素， L-DOPA，伽马氨基丁酸和甲状腺素被对待。结果显示出那肾上腺素，在 1 μ m ol/dm~3 的集中的新肾上素 andL-DOPA 在 S.canopus 导致了幼虫的解决和变形，与到 L-DOPA 的 1 μ m ol/dm~3 的短暴露(1 h ) 导致快速的解决。相反，在 0 的集中的伽马氨基丁酸。1 ～ 100.0 μ m ol/dm~3 显著地禁止了 S 的解决和变形。罐头作品幼虫。另外，在 1 ～的甲状腺素 50 μ g /dm~3 没在 S 在幼虫的解决和变形上有效果。罐头作品。这些结果在 S 的解决和变形建议重要性 ofneurotransmitters。罐头作品幼虫。

英文摘要：

The larvae of ascidian Styela canopus Savigny were treated with epinephrine, norepinephrine, L-DOPA, GABA and thyroxin to test the ability of these compounds to induce or inhibit larval settlement and metamorphosis. The results showed that epinephrine, norepinephrine and L-DOPA at the concentration of 1 μmol/dm^3 induced larval settlement and metamorphosis in S. canopus, with short exposure （ 1 h） to 1 μmol/dm^3 of L-DOPA inducing rapid settlement. In contrast, GABA at the concentrations of 0.1 ～1130.0 μmol/dm^3 significantly inhibited the settlement and metamorphosis of S. canopus larvae. In addition, thyroxin at 1 -50 μg/dm^3 had no effect on larval settlement and metamorphosis in S. canopus. These results suggest the importance of neurotransmitters in the settlement and metamorphosis of S. canopus larvae.