2023 Fiscal Year Final Research Report
Conservation study of the marine invertebrate brittle star, Ophiothela danae, based on museum specimen DNA
| Project/Area Number |
21K05632
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 39060:Conservation of biological resources-related
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| Research Institution | Hiroshima Shudo University (2022-2023)
The University of Tokyo (2021) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤田 敏彦 独立行政法人国立科学博物館, 動物研究部, 部長 (70222263)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 系統 / 分類 / 集団遺伝 / MIG seq / クモヒトデ類 / 博物館標本 / 古標本 / ニシキクモヒトデ |
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| Outline of Final Research Achievements |
In this study, we conducted a population genetic study on 313 specimens of Ophiothela danae (Ophiuroidea: Echinodermata) collected from various regions of Japan and Southeast Asia between 1975 and 2021, by using MIG seq analysis. We found that ethanol-preserved specimens provided more genetic information than formalin-preserved ones, with this trend being more pronounced in newer specimens. Our analysis indicated that genetic diversity increases in populations located further northeast, suggesting that the distribution center of the O. danae is in temperate regions. This study confirmed the usefulness of museum specimens for MIG seq analysis.
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| Free Research Field |
動物系統分類学
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| Academic Significance and Societal Importance of the Research Achievements |
温暖化やそれに伴う気候変動は，生物の地理分布とその遺伝構造の関係に影響を与えていると考えられる．このような遺伝構造の変遷の解明は，生物多様性の維持に直結する重要な課題といえるが，地球の生命圏の約9割（面積）を占める潮下帯以深の生物に関するこのような研究は少ない．本研究では，これまでにモニタリングが難しかった潮下帯以深に生息する生物の標本を用いることにより，過去から現在までの海洋生物の遺伝構造の変化の理解を進めることに貢献した．
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