2009 Fiscal Year Final Research Report
Analysis of factors crucial to the invasion success of an alien sunfish, Lepomis macrochirus, in Japan by evolutionary approaches
| Project/Area Number |
19570018
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Mie University |
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Principal Investigator |
KAWAMURA Kouichi Mie University, 大学院・生物資源学研究科, 准教授 (80372035)
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| Co-Investigator(Kenkyū-buntansha) |
KOMARU Akira 三重大学, 大学院・生物資源学研究科, 教授 (10293804)
YONEKURA Ryuji 岐阜県河川環境研究所, 主任研究員 (40455514)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 外来種の定着成功 / 遺伝的分化と形態分化 / Fst-Qst解析 / 適応放散 / ブルーギル / 分子進化 / 自然選択 / 遺伝的多様性 |
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| Research Abstract |
To elucidate the role of genetic factors crucial to the invasion success of bluegill sunfish in Japan, morphological and genetic analyses were performed, together with Qst-Fst analysis in rearing experiments. Population analysis suggested that invasion success in many populations of Japan was mainly due to high genetic diversity of their founder population in Lake Biwa. Qst-Fst analysis revealed that difference in adaptive characters among populations was caused by natural selection, rather than genetic drift. Sustenance of high genetic diversity in adaptive characters was considered to be important in the invasion success of bluegill in Japan.
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