| 摘要: |
| 观察描述了海蜇Rhopilema esculenta从碟状体发育至幼蛰的形态变化特征，首次观察到了消化腔残留通道口的愈合过程，并重新对海蜇浮游幼体各个阶段进行了划分和定义。依据苗种培育与生产实际采样，在水温20±1 ℃，盐度28～29，pH为7.8～8.2条件下，初生碟状体（伞径2～3 mm）经过20 d的培养，棒状附着器形成，发育成为幼蜇（15～20 mm）。测定分析了人工培养的初生碟状体到幼蜇的摄食量和生长规律（伞径和体重），2～20 mm的海蜇幼体伞径日生长率呈指数增长，方程为y=2.748 8e0.101 8x，体重与伞径的关系式为y=6×10-5-0.5x3.547 5，摄食量与伞径呈指数增长，方程为y=43537x1.775。 |
| 关键词: 海蜇 伞径 碟状体 稚蜇 幼蜇 |
| DOI： |
| 分类号: |
| 基金项目:国家重点基础研究发展计划（973）项目（2011cb403605）资助 |
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| Study on the morphological and growth characteristics of Rhopilema esculenta: from ephyra to juvenile jellyfish |
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| Abstract: |
| The morphological characteristics of Rhopilema esculenta from ephyra to juvenile jellyfish were described, the healing process of residual access mouth of gastrovascular cavity was observed for the first time, and the development phases of jellyfish were redefined. At the water temperature of 20±1℃, salinity 28~29, and pH 7.8~8.2, cultured ephyra（diameter 2~3mm）could grow to juvenile jellyfish (15~20mm) with clubbed subsidiary organ after 20d. The food consumption and growth characteristics (diameter and weight) from newly released ephyra to juvenile jellyfish were analyzed. It was found that the daily growth equation of juvenile jellyfish’s diameter（2～20mm）is y=2.748 8e0.101 8x. The relationship between weight and diameter, food consumption and diameter of juvenile jellyfish were y=6×10-5-0.5x3.547 5, y= 43.537x1.775 respectively. |
| Key words: Rhopilema esculenta Diameter Ephyra Jellyfish larva Young jellyfish |
