Spider mites assess predation risk by using the odor of injured conspecifics.
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.
Oku
Keiko
K
Laboratory of Ecological Information, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan. koku@kais.kyoto-u.ac.jp
Yano
Shuichi
S
Osakabe
Masahiro
M
Takafuji
Akio
A
D000818:Animals; D004924:Escape Reaction; D005260:Female; D009812:Odorants; D011157:Population Dynamics; D011235:Predatory Behavior; D040102:Tetranychidae / Q000502:physiology*; D014947:Wounds and Injuries