論文

査読有り
2013年6月18日

Development and polyp formation of the giant box jellyfish Morbakka virulenta (Kishinouye, 1910) (Cnidaria: Cubozoa) collected from the Seto Inland Sea, Western Japan

Plankton and Benthos Research
  • Sho Toshino
  • ,
  • Hiroshi Miyake
  • ,
  • Susumu Ohtsuka
  • ,
  • Kazuya Okuizumi
  • ,
  • Aya Adachi
  • ,
  • Yoshimi Hamatsu
  • ,
  • Makoto Urata
  • ,
  • Kazumitsu Nakaguchi
  • ,
  • Syuhei Yamaguchi

8
1
開始ページ
1
終了ページ
8
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3800/pbr.8.1

The giant cubozoan Morbakka virulenta was collected from the central part of the Seto Inland Sea, western Japan in October 2009, in order to observe its development and polyp formation. Fertilization occurred externally. Demersal fertilized eggs were obtained during the incubation of mature females and males kept at a temperature of ca. 17 to 21°C. From the two-cell stage onwards, fertilized eggs developed into blastulae within 4 h. The development of the blastulae stopped for 21 days after forming blastocysts. This formation of blastocysts is up to now unique within the Cnidaria. The planulae, which developed inside the cysts and lacked larval ocelli, this being characteristic for the Cubozoa, finally metamorphosed into polyps bearing only a single tentacle. The 16-tentacled-stage in polyps was reached about three months after this metamorphosis. Budding occurred in eight-tentacled polyps and swimming polyps were released nine days after the commencement of budding. These unique developmental features of M. virulenta may shed additional light on the evolution of life history strategies in the Cnidaria. © The Plankton Society of Japan.

リンク情報
DOI
https://doi.org/10.3800/pbr.8.1

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