Evolutionary conditions for simultaneous hermaphroditism considered from mating frequency in Chromodorid Nudibranchs
| Project/Area Number |
22570029
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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 | Nihon University |
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Principal Investigator |
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| Research Collaborator |
SEKIZAWA Ayami 大阪市立大学, 理学研究科, 博士課程在学
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 行動生態 / 進化生態 / 同時雌雄同体 / 裸鰓類 / 配偶戦略 / 精子置換 / ウミウシ / 多回交尾 / 性淘汰 / 精子競争 / 受精嚢 / ウミウシ(裸鰓類) / 配偶行動 / 性的資源分配 / 同時的雌雄同体 / 繁殖戦略 / 生殖器 / 父子判定 / PCR |
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| Research Abstract |
DNA fingerprinting applied to veliger larvae from 30 egg masses of Chromodoris reticulata (misidentified as C. tinctoria at the beginning of the study) revealed the number of sperm donors (biological fathers) was estimated to 2 - 4. Stored sperms in bursa coluratrix and sperm receptacle were clarified to originate from plural individuals. These findings suggest that mating frequency in simultaneously hermaphroditic nudibranchs is not so scarce as hitherto imagined and sexual selection functions as strong as in gonochorists.
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Report
(4 results)
Research Products
(64 results)
