| Project/Area Number |
20405007
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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 |
Ecology/Environment
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIMURA Jin 静岡大学, 創造科学技術大学院, 教授 (10291957)
HORI Michio 京都大学, 理学研究科, 教授 (40112552)
ENDO Kazuyoshi 東京大学, 東京大学, 教授 (80251411)
MATSUNO Kenji 大阪大学, 理学研究科, 教授 (60318227)
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| Co-Investigator(Renkei-kenkyūsha) |
OTA Hidetoshi 兵庫県立大学, 自然・環境科学研究所, 教授 (10201972)
UESHIMA Rei 東京大学, 理学系研究科, 准教授 (20241771)
AOTSUKA Tadashi 首都大学東京, 理学系研究科, 教授 (40106604)
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| Project Period (FY) |
2008 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2009: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2008: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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| Keywords | 左右性 / 交尾行動 / 頻度依存淘汰 / 東南アジア / 巻貝 / カタツムリ |
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| Research Abstract |
We pursued long-term ecological surveys to understand the evolutionary history and population dynamics of dimorphism for left-right polarity in development in the tree snail genus Amphidromus. Both morphs of chirality coexist within populations, which is not possible as long as positive frequency-dependent selection occurs as known for snails that need to copulate for reproduction. We achieved behavioral analyses by recording cases ofinterchiral and intrachiral copulation, which allow them to coexist, by an infrared time-lapse video system.
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