2021 Fiscal Year Final Research Report
The truth of cleaning fish mimicry: solving the mystery with inter-regional and inter-species comparisons
| Project/Area Number |
19K06845
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 45040:Ecology and environment-related
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| Research Institution | Chukyo University |
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Principal Investigator |
Kuwamura Tetsuo 中京大学, 社会科学研究所, 特任研究員 (00139974)
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| Co-Investigator(Kenkyū-buntansha) |
坂井 陽一 広島大学, 統合生命科学研究科(生), 教授 (70309946)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ニセクロスジギンポ / 掃除魚擬態 / 攻撃擬態 / 保護擬態 / クロスジギンポ / 鰭かじり / 卵食 / ホンソメワケベラ |
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| Outline of Final Research Achievements |
To verify the mimicry effect of the false cleanerfish Aspidontus taeniatus (mimic), which resembles the bluestreak cleaner wrasse Labroides dimidiatus in color and shape, the population fluctuation and feeding behavior of this and another species of the same genus, A. dussumieri (nonmimic) were observed on the coral reefs of Miyako Island, Okinawa, and compared between the two species and between regions. The survival rate of the mimic was more than twice that of the nonmimic, but the difference was not significant, and the effect of protective mimicry could not be demonstrated. The mimic, regardless of body size, bit on the caudal fins of small fish and fed on the eggs of damselfishes, which were not observed in the nonmimic, suggesting the effect of aggressive mimicry in fish-fin biting.
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| Free Research Field |
動物社会学、行動生態学、海洋生物学、魚類学
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| Academic Significance and Societal Importance of the Research Achievements |
ニセクロスジギンポの掃除魚擬態については、保護擬態と攻撃擬態の効果が示唆されてきた。本研究ではデータ数が不十分ながら、擬態種の生存率が非擬態種よりも高い可能性が初めて示された。攻撃擬態についてはこれまで小型個体において実証されていたが、本研究では大型個体においても効果があることが初めて示された。掃除魚擬態は、古くから一般ダイバーなどにも興味をもたれてきた現象であるが、内容を誤解されている場合が少なからず見受けられ、本研究により正しい知識の周知が期待される
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