2012 Fiscal Year Final Research Report
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
|
| Keywords | 行動生態 / 進化生態 / 同時雌雄同体 / 裸鰓類 / 配偶戦略 |
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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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