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A large-scale breeding experiment and observations on development of Cyanea nozakii (Scyphozoa, Cyaneidae) from fertilized eggs to larval medusae

文献类型： 外文期刊

作者： Liu, Chun-sheng 1 ; Zhuang, Zhi-meng 1 ; Chen, Si-qing 1 ; Yan, Jing-ping 1 ; Liu, Chang-lin 1 ; Sun, Jian-ming 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： Cyanea nozakii;Breeding technology;Spawning;Polyp;Larval medusa

期刊名称：HYDROBIOLOGIA （ 影响因子：2.694； 五年影响因子：2.781 ）

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收录情况： SCI

摘要： The Scyphozon Cyanea nozakii is a common jellyfish species that blooms in Chinese seas. However, little is known of the field ecology of this species for the lack of polyps. Here, we studied a breeding technology of C. nozakii that included artificial acclimation of wild jellyfish, stimulation of spawning, as well as polyp and medusa rearing. Female and male medusae were observed to have dark brown ovaries and milky white testes, respectively. Massive spawning was stimulated by continuous light (1,000-1,500 lux) about 4 h a day. Planulae of C. nozakii were used as initial feed for rearing four-tentacle polyps. This food was replaced by Artemia nauplii when polyps developed to intermediate and fully developed stages. Ephyrae and 50 mm medusae were also obtained under laboratory conditions, though the survival rates of both stages were only about 20%. In this paper, we described a process of large-scale breeding of C. nozakii polyps, and finally making about 600 pieces of 30 x 40 cm(2) corrugated plates adhered with four polyps per cm(2).

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