Spider Mites Assess Predation Risk by Using the Odor of Injured Conspecifics |
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Authors: | Keiko Oku Shuichi Yano Masahiro Osakabe Akio Takafuji |
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Affiliation: | (1) Laboratory of Ecological Information, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan |
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Abstract: | When a predatory mite, Amblyseius womersleyi is present, Tetranychus kanzawai takes refuge on its webs during a quiescent stage. To examine the factors responsible for the antipredator behavior of T. kanzawai, we exposed T. kanzawai to the odor of conspecifics, A. womersleyi, and both T. kanzawai and A. womersleyi. The proportion of T. kanzawai females that took refuge was significantly higher when they were exposed to the odor of `both T. kanzawai and A. womersleyi.' Furthermore, the proportion of T. kanzawai females that took refuge was significantly higher when they were exposed to injured conspecifics than to intact conspecifics. These results suggest that T. kanzawai assesses predation risk, at least in part, by using the odor of injured conspecifics. |
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Keywords: | Antipredator behavior injured conspecifics odor predation risk quiescent stage spider mites |
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