| Project/Area Number |
15403014
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Chiba University |
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Principal Investigator |
YAMAGUCHI Toshiyuki Chiba University, Marine Biosystems Research Center, Professor, 海洋バイオシステム研究センター, 教授 (10101106)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Jun Nagasaki University, Faculty of Fisheries, Professor, 水産学部, 教授 (90346908)
ISHIBASHI Jun-ichiro Kyushu University, Graduate School of Sciences, Associate Professor, 大学院・理学研究院, 助教授 (20212920)
MIYAZAKI Jun-ichi Yamanashi Universit, Faculty of Education Human Sciences, Associate Professor, 教育人間科学部, 助教授 (80229830)
TSUCHIDA Shinji JAMSTEC, Extremobiosphere Research Center, Researcher, 海洋科学技術センター・海洋生態環境研究部, 研究員 (30344295)
YAMANAKA Toshio Kyushu University, Graduate School of Social and Cultural Sciences, Assistant Professor, 大学院・比較文化研究院, 助手 (60343331)
小島 茂明 東京大学, 海洋研究所, 助教授 (20242175)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥15,400,000 (Direct Cost: ¥15,400,000)
Fiscal Year 2005: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2004: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2003: ¥7,500,000 (Direct Cost: ¥7,500,000)
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| Keywords | deep-sea hydrothermal vent / endemic species / taxonomy / phylogenetic evolution / dispersal / origin / primitiveness / Southwest Pacific Ocean |
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| Research Abstract |
This is report on the morphological, ecological, biogeographic and molecular biological studies for vent communities collected at our expedition to the deep-sea hydrothermal vents at the Lau and Havre Back-arc Basins, Southwest Pacific from September 23 to November 10,2004 using Japanese submersible "Shinkai 6500" and her mother ship "Yokosuka." The main target of this research project is to clarify origin and evolution of the deep-sea hydrothermal vent and cold seep communities of the Southwest Pacific.
The Lau and Havre Back-arc Basins, Southwest Pacific hold communities of high biological diversity in comparison with other such vent and seep communities in the world based on our research of principal component in the deep-sea hydrothermal vent and seep communities such as bivalves, gastropods, crustaceans (including crabs, shrimps and barnacles), worms, tube-worms, etc. Particularly, barnacles in crustacean shown the highest diversity in the known deep-sea vent and seep of the world.
… More
We could found all four suborders, Scalpellomorpha, Brachylepadomorpha, Verrucomorpha, and Balanomorpha from the Lau Basin. And the peripheral areas of the Lau Basin such as North Fiji and Manus Basins show the second high biological diversity hold three suborders except Brachylepadomorpha.
The morphological examination of barnacles collected from the Lau and Havre basins shows that scalpellomrphan barnacle Ashikailepas has the most primitive morphological characteristics and also the widest distribution at the West Pacific.
The molecular biology of some principal vent animals collected from the Lau and Havre basins shown primitive phylogenetic position in comparison with the group of the East Pacific, West Pacific (Northwest to Southwest) and Indian Oceans. Ashinkailepas in comparison with two Japanese and one Havre populations population shows the most primitive Scalpellomorph in the molecular phylogeny. Therefore, the origin of the known vent and seep communities seems to be Southwest Pacific. Less
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