2011 Fiscal Year Final Research Report
Social determination of sex in fishes : testing reversed sex change under low density conditions
| Project/Area Number |
21570026
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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 | Chukyo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SUNOBE Tomoki 東京海洋大学, 水圏科学フィールド教育研究センター, 准教授 (00250142)
SAKAI Yoichi 広島大学, 生物圏科学研究科, 准教授 (70309946)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 性転換 / 魚類 / 社会的地位 |
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| Research Abstract |
Reversed sex change in the field has been reported in only five species among fishes. In the present study, we confirmed this in three polygynous and protogynous fishes : the cleaner wrasse Labroides dimidiatus, the rusty angelfish Centropyge ferrugata, and the magenta dottyback Pictichromis porphyria. On the other hand, our field and aquarium experiments strongly suggest that the Celebes flathead Thysanophrys celebica, random-mating and protandrous species, will not change sex in the reverse direction. We suggest that the evolution of reversed sex change may depend on the type of mating system of each species.
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