2013 Fiscal Year Final Research Report
Effects of ants on predator-prey interactions among mites in agro-ecosystems
| Project/Area Number |
21580066
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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 |
Applied entomology
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| Research Institution | Kyoto University |
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Principal Investigator |
YANO Shuichi 京都大学, (連合)農学研究科(研究院), 助教 (30273494)
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| Co-Investigator(Kenkyū-buntansha) |
AKINO Toshiharu 京都工芸繊維大学, 学内共同利用施設等, 教授 (40414875)
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| Co-Investigator(Renkei-kenkyūsha) |
OSAKABE Masahiro 京都大学, 大学院農学研究科, 准教授 (50346037)
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| Project Period (FY) |
2009-04-01 – 2014-03-31
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| Keywords | アリ / ハダニ / カブリダニ / 防御網 / 捕食回避 / 集合性 / 生物的防除 / 人工生態系 |
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| Research Abstract |
Spider mites live in the space between leaf surfaces and thin silk webs. Spider mites avoided generalist predators such as ants by staying inside the webs, while the mites avoided predatory mites that intruded into their webs by exiting the webs. In the presence of both predators, however, the conflicting antipredator defenses of spider mites broke down; the mites that moved out of the webs in response to predatory mites were preyed upon by ants. This study offers the first evidence that ants may have a positive effect on the biological control of spider mites by predatory mites. Moreover, we also found in the course of the above study that cooperative web sharing against predators promotes group living in spider mites and that spider mite species that does not build protective webs has an alternative defense against predators.
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[Remarks] 日本経済新聞2014年2月18日朝刊16面
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[Remarks] 京都新聞2014年1月23日夕刊8面
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[Remarks] 産経新聞(京阪奈版)2012年3月13日朝刊26面
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[Remarks] 科学新聞2012年3月9日2面
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