| 摘要: |
| 为查清沙蜇大量暴发的原因, 采用黄海北部的沙蜇亲体进行自然受精获得了数百万的螅状体, 除海月水母和发形霞水母在消化腔和雌体的性腺中完成受精外, 上述其余种类均为体外受精, 霞水母属的2个种类的浮浪幼虫在形成螅状体前先形成一个具角质的浮浪体囊, 沙蜇、海蜇、黄斑海蜇和Stomolophus meleagris螅状体繁殖新螅状体的唯一无性繁殖方式是足囊繁殖, 霞水母可通过足囊和由匍匐茎形成囊胞两种方式繁殖新螅状体, 海月水母(A. aurita)螅状体繁殖新螅状体的的无性繁殖方式包括足囊繁殖、出芽生殖、匍匐茎生殖、纵向分裂、内繁殖体和外繁殖体生殖, 同时有直接发育现象, Rhizostoma pulmo的无性繁殖方式有足囊, 出芽生殖, 匍匐茎, 浮浪体芽。 |
| 关键词: 沙蜇, 繁殖生物学特征, 钵水母, 比较 |
| DOI：10.11693/hyhz201203022022 |
| 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; 农业公益性行业专项, 200903005 号 |
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| COMPARISON OF NEMOPILEMA NOMURAI AND OTHER JELLYFISHES IN REPRODUCTIVE BIOLOGICAL CHARACTERISTICS AND MORPHOLOGY |
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DONG Jing, SUN Ming, ZHAO Yun, WANG Bin, LIU Xiu-Ze, YU Xu-Guang, LIU Chun-Yang
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Liaoning Ocean and Fisheries Science Research Institute, Key Laboratory of Marine Biological Resources and Ecology
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| Abstract: |
| To clarify the causes for the mass occurrences of Nemopilema nomurai, the multi-million scyphistomae were obtained by natural fertilization, using N. nomurai as parent body from the northern Yellow Sea. The stages of N. nomurai from planula, scyphistoma, strobila and ephyra to young medusa were observed under laboratory conditions, the life cycle of N. nomurai was compared with earlier findings of the life cycle of C. nozakii,C. capillata, A. aurita, Rhopilema esculentum, R. hispidum, Rhizostoma pulmo and Stomolophus meleagris. For A. aurita and C. capillatamedusae, fertilization occurred in the gastrovascular cavity and gonad of female, others of them in the water. Planulae of C. nozakii could form planulocysts prior to forming a scyphistoma. C. nozakii and C. capillatacould produce podocysts and a stolon, However, N. nomurai, R. esculentum, R. hispidum and S. meleagris, and N. nomurai(Kawahara et al, 2006) only produced one type of cysts: podocysts. In addition the scyphistoma of A. aurita might further produce polyps by producing podocysts, direct buding, formation of stolon, longitudinal fission, internal production of free-swimming propagules, external production of free-swimming propagules and direct development from planula to single ephyra. The asexual reproduction of Rhizostoma pulmo included producing podocysts, buding, formation of stolon and planuloid buds. |
| Key words: Nemopilema nomurai, Reproductive biological characteristic, Scyphozoans, Comparison |
