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Marine Biology

, Volume 152, Issue 2, pp 273–284 | Cite as

Reproductive biology and larval development of the temperate soft coral Dendronephthya gigantea (Alcyonacea: Nephtheidae)

  • Sung-Jin Hwang
  • Jun-Im Song
Research Article

Abstract

Dendronephthya gigantea (Verrill, 1864), the dominant species in the waters surrounding Jeju Island, Korea, is a gonochoric internal brooder that releases its planulae from July to September. The ratio of females to males in this azooxanthellate soft coral is 2:1. Oogenesis takes place for 12 months and spermatogenesis for 3–5 months. Gametes mature as seawater temperatures increase, suggesting a seasonal factor in the reproductive cycle. Planulae brooded in the gastrodermal canal were expelled around the times of the full moon and the new moon; a significant difference in numbers expelled was not found between day and night. Ciliated planulae had negative buoyancy after planulation, and showed rapid metamorphosis into a primary polyp stage within 2 days.

Keywords

Seawater Temperature Soft Coral Mature Oocyte Full Moon Vitellogenic Oocyte 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was supported mainly by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2003-C00062) and partially by the grant Ecotechnopia 21(052-021-007) from the Korea Ministry of Environment. We would like to gratefully thank M Involti for his help in the experiment. We also acknowledge SM Song for her valuable aid in statistical analysis and IY Cho for her assistance in the histological work.

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Department of Life SciencesEwha Womans UniversitySeoulSouth Korea

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