Studies on diverse life cycle of cnidarians

• Project/Area Number: 20570093
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: University of the Ryukyus
• Principal Investigator: HIDAKA Michio University of the Ryukyus, 理学部, 教授 (00128498)
• Co-Investigator(Kenkyū-buntansha): HARII Saki 琉球大学, 熱帯生物圏研究センター, 准教授 (30334535)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: サンゴ / 刺胞動物 / 生活史 / 寿命 / 老化 / テロメア / 共生 / 群体 / ポリプ / 褐虫藻 / クラゲ

Research Abstract

This study aims to investigate (i) mechanisms of different lifespans between polyp and medusa stages of a jellyfish, (ii) age estimation of coral polyps and colonies, (iii) establishment of symbiosis with zooxanthellae in coral larvae. Somatic tissues of a coral and a jellyfish exhibited telomerase activity. We applied the single telomere length assay (STELA) developed for humans to cnidarians. Our results suggest the possibility to estimate coral's age based on telomere length. Coral larvae can acquire different genotypes of zooxanthellae indicating less specificity compared to adult.

Research Products

• [Journal Article] Comparison of telomere length among different life cycle stages of the jellyfish Cassiopea andromeda. (2010)
  • Author(s): Ojimi M.C., Hidaka M.
  • Journal Title: Mar Biol 157 Pages: 2279-2287
• [Journal Article] Comparison of telomere length among different life cycle stages of the jellyfish Cassiopea andromeda. (2010)
  • Author(s): Ojimi M.C.
  • Journal Title: Marine Biology Volume: 157 Pages: 2279-2287
  • Peer Reviewed
• [Journal Article] Telomerase activity is not related to life history stage in the jellyfish Cassiopea sp. (2009)
  • Author(s): Ojimi M.C., Isomura N., Hidaka M.
  • Journal Title: Comp Biochem Physiol Part A 152 Pages: 240-244
• [Journal Article] Onset of symbiosis and distribution patterns of symbiotic dinoflagellates in the larvae of scleractinian corals. (2009)
  • Author(s): Harii S., Yasuda N., Lodoriguez-Lanetty M., Irie T., Hidaka M.
  • Journal Title: Mar Biol 156 Pages: 1203-1212
• [Journal Article] Telomerase activity is not related to life history stage in the jellyfish Cassiopea sp. (2009)
  • Author(s): Ojimi M.C.
  • Journal Title: Comp Biochem Physiol Part A 152 Pages: 240-244
  • Peer Reviewed
• [Journal Article] Telomerase acitivity is not related to life history stage in the jellyfish Cassiopea sp. (2009)
  • Author(s): Ojimi M. C.
  • Journal Title: Comparative Biochemistry and Physiology, part A 152 Pages: 240-244
  • Peer Reviewed
• [Presentation] Do coral larvae acquire symbionts in nature (2010)
  • Author(s): Harii S., Sampayo E., Yorifuji M., Sinniger F., Hidaka M.
  • Organizer: European International Society for Reef Studies
  • Place of Presentation: Netherland
  • Year and Date: 2010-12-25
• [Presentation] Do coral larvae acquire symbionts in nature? (2010)
  • Author(s): Harii S.
  • Organizer: Euro International Coral Reef Society Symposioum
  • Place of Presentation: Hof van Wageningen(オランダ)
  • Year and Date: 2010-12-15
• [Presentation] サンゴの特定染色体のテロメア長測定の試み:STELA法の適用と検証 (2010)
  • Author(s): 蔦宏興
  • Organizer: 日本サンゴ礁学会第13回大会
  • Place of Presentation: つくばカピオ(茨城県)
  • Year and Date: 2010-12-01
• [Presentation] 造礁サンゴの初期生活史における褐虫藻獲得 (2010)
  • Author(s): 波利井佐紀・Eugenia Sampayo・依藤実樹子・Frederic Sinniger・日高道雄
  • Organizer: 日本プランクトン学会・日本ベントス学会合同大会
  • Place of Presentation: 東京大学大気海洋研究所
  • Year and Date: 2010-10-10
• [Presentation] 造礁サンゴの初期生活史における褐虫藻獲得 (2010)
  • Author(s): 波利井佐紀
  • Organizer: 日本プランクトン学会・日本ベントス学会合同大会
  • Place of Presentation: 東京大学柏キャンパス(千葉県)
  • Year and Date: 2010-10-10
• [Presentation] Telomere length reflects senescence of the solitary coral Ctenactis echinata. (2010)
  • Author(s): Ojimi M.C., Loya Y., Hidaka M.
  • Organizer: 2nd Asia Pacific Coral Reef Symposium
  • Place of Presentation: Phuket, Thailand
  • Year and Date: 2010-06-24
• [Presentation] Telomere length reflects senescence of the solitary coral Ctenactis echinata. (2010)
  • Author(s): Ojimi M.C.
  • Organizer: 2nd Asia Pacific Coral Reef Symposium
  • Place of Presentation: プーケット(タイ国)
  • Year and Date: 2010-06-01
• [Presentation] Stress responses of coral-zooxanthella symbiotic system. (2010)
  • Author(s): Hidaka M.
  • Organizer: 4th Bilateral Seminar Italy-Japan
  • Place of Presentation: 愛知県立大学(愛知県)
  • Year and Date: 2010-06-01
• [Presentation] Attempt to estimate telomere length of the colonial coral Galaxea fascicularis. (2010)
  • Author(s): Tsuta H.
  • Organizer: 2nd Asia Pacific Coral Reef Symposium
  • Place of Presentation: プーケット(タイ国)
  • Year and Date: 2010-06-01
• [Presentation] Attempt to estimate telomere length of the colonial coral Galaxea fascicularis. (2010)
  • Author(s): Tsuta H., Hidaka M.
  • Organizer: 2nd Asia Pacific Coral Reef Symposium
  • Place of Presentation: Phuket, Thailand
• [Presentation] Life History of Corals and Cassiopea Jellyfish : Senescence and Possible Rejuvenation (2009)
  • Author(s): 日高道雄
  • Organizer: 日本サンゴ礁学会第12回大会
  • Place of Presentation: 沖縄県本部町
  • Year and Date: 2009-11-29
• [Presentation] Life history of corals and Cassiopea jellyfish : senescence and possible rejuvenation (2009)
  • Author(s): 日高道雄
  • Organizer: 日本サンゴ礁学会第12回大会
  • Place of Presentation: 本部町立中央公民館大ホール(沖縄県)
  • Year and Date: 2009-11-27
• [Presentation] 単体性サンゴ トゲクサビライシの体サイズとテロメア長の関係 (2009)
  • Author(s): 日高道雄
  • Organizer: 日本動物学会第80回大会
  • Place of Presentation: 静岡グランシップ
  • Year and Date: 2009-09-20
• [Presentation] サカサクラゲ Cassiopea sp.のポリプ世代とクラゲ世代のテロメア長比較 (2009)
  • Author(s): 大慈彌みち子
  • Organizer: 日本動物学会第80回大会
  • Place of Presentation: 静岡グランシップ
  • Year and Date: 2009-09-20
• [Presentation] Telomerase activity and telomere length of the upside-down jellyfish Cassiopea andromeda at different life cycle stages. (2009)
  • Author(s): Ojimi M.C., Hidaka M.
  • Organizer: International Symposium on Marine Genomics 2009
  • Place of Presentation: Okinawa
• [Presentation] Telomerase activity and telomere length of the upside-down jellyfish Cassiopea andromeda at different life cycle stages (2009)
  • Author(s): 大慈彌みち子
  • Organizer: Symposium on Marine Genomics 2009
  • Place of Presentation: Hotel Southern Plaza Kaiho, Okinawa
• [Presentation] 造礁サンゴの体細胞組織におけるテロメラーゼ活性の検出 (2008)
  • Author(s): 中道弘敏, 磯村尚子, 日高道雄
  • Organizer: 第11回日本サンゴ礁学会大会
  • Place of Presentation: 静岡(グランシップ静岡)
  • Year and Date: 2008-11-24
• [Presentation] ミドリイシ属幼生は野外で褐虫藻を獲得するか?-その特異性と柔軟性 (2008)
  • Author(s): 波利井佐紀・日高道雄
  • Organizer: 日本サンゴ礁学会第11回大会
  • Place of Presentation: 静岡
  • Year and Date: 2008-11-22
• [Presentation] Diverse life history and symbiosis in corals and Cassiopea jellyfish. (2008)
  • Author(s): 日高道雄
  • Organizer: Omics in the Ocean
  • Place of Presentation: Taiwan
  • Year and Date: 2008-09-13
• [Presentation] サカサクラゲのポリプとクラゲ世代のテロメラーゼ活性の比較 (2008)
  • Author(s): 大慈彌みち子, 磯村尚子, 日高道雄
  • Organizer: 第79回日本動物学会
  • Place of Presentation: 福岡(福岡大学)
  • Year and Date: 2008-09-06
• [Presentation] 造礁サンゴは発生段階のどの時期に褐虫藻を獲得するか (2008)
  • Author(s): 波利井佐紀・安田直子・Mauricio Rodriguez-Lanetty・日高道雄
  • Organizer: 第79回日本動物学会
  • Place of Presentation: 福岡
  • Year and Date: 2008-09-05
• [Presentation] Telomerase activity and telomere sequence in the Cassiopea jellyfish (2008)
  • Author(s): Ojimi M., Isomura N., Hidaka M.
  • Organizer: 11th International Coral Reef Symposium
  • Place of Presentation: Florida (Fort Lauderdale)
  • Year and Date: 2008-07-07
• [Book] 造礁サンゴ.楽園を作った偉大な建築家-2造礁サンゴのからだ、5造礁サンゴのライフスタイル (2009)
  • Author(s): 日高道雄
  • Total Pages: 56
  • Publisher: 沖縄県立博物館・美術館
• [Remarks] ホームページ等
  • URL: http://www.cc.u-ryukyu.ac.jp/~hidakom/