| 摘要: |
| 采用控制光照强度的方法, 研究了不同光照强度对白色霞水母无性繁殖的影响。结果表明, 400 lx 组螅状体的相对增长率、特定生长率和螅状体足囊、囊胞繁殖率均显著高于其它各试验组(P<0.05), 呈现出400 lx>800 lx>1200 lx>0 lx的趋势。在设定的光照强度范围内, 螅状体足囊、囊胞繁殖出现的时间随光照强度的减少而延迟。800 lx 组的足囊萌发率最高, 但各试验组足囊萌发率之间无显著性差异(P>0.05)。试验期间始终是400 lx组螅状体的横裂率最高, 试验结束时, 0 lx 组螅状体的横裂率最低。试验结果说明, 适当的光照度对白色霞水母螅状体生长、螅状体足囊、囊胞繁殖和横裂生殖均有促进作用, 强光条件或完全无光照条件不适宜白色霞水母螅状体的生长并可使横裂生殖延迟或受到抑制。 |
| 关键词: 白色霞水母, 螅状体, 光照, 无性繁殖, 横裂生殖 |
| DOI：10.11693/hyhz201203024024 |
| 分类号: |
| 基金项目:国家重点基础研究发展计划(973)项目, 2011CB403601 号; 海洋公益性行业科研专项, 200905019-4 号、201005018号 |
|
| EFFECTS OF LIGHT INTENSITY ON ASEXUAL REPRODUCTION OF THE SCYPHOZOAN CYANEA NOZAKII KISHINOUYE |
|
SUN Ming, DONG Jing, WANG Ai-Yong
|
|
Liaoning Ocean and Fisheries Science Research Institute, Key Laboratory of Marine Biological Resources and Ecology
|
| Abstract: |
| The effect of light intensity on asexual reproduction of Cyanea nozakii Kishinouye was investigated. Relative growth rate, specific growth rate of scyphistomae and scyphistomae cysts reproductive rate exposed to 400 lx were significantly higher than those exposed to other treatments (P<0.05). The result was 400 lx > 800 lx > 1200 lx > 0 lx. The occurrence of scyphistomae cysts reproduction delayed as the light intensity decreased from 400 lx to 0 lx. Podocyst germination rate was highest in 800 lx, and no significant difference was observed among different groups (P>0.05). The strobilation rate was highest in 400 lx and lowest in 0 lx during the experiment. Suitable light intensity might accelerate the growth, scyphistomae cysts reproduction, and strobilation. |
| Key words: Cyanea nozakii Kishinouye, Scyphistomae, Light intensity, Asexual reproduction, Strobilation |
