Function of quiescence of Tetranychus kanzawai (Acari: Tetranychidae), as a defense mechanism against rain
Function of quiescence of Tetranychus kanzawai (Acari: Tetranychidae), as a defense mechanism against rain
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DOI：
10.1303/aez.2000.339
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发表时间：
2000-08-01
影响因子：
1.3
通讯作者：
Takafuji, A
中科院分区：
文献类型：
--
作者：
Ikegami, Y;Yano, S;Takafuji, A
本文比较了静息期的金泽叶螨雌螨和成年期的金泽叶螨在模拟降雨条件下的叶盘上的死亡率。在模拟降雨条件下，成年雌虫的死亡率显著高于静止若虫。这可能是由于两个阶段的耐水能力不同，因为在没有模拟降雨的情况下，死亡率没有差异。在降雨引起的水分增加下，静息期延长，静息期的出现是对水分减少的响应。这种发育的可塑性似乎确保了它们在雨后安全地换羽。生命周期中活跃和静止阶段的存在可以作为一种下注对冲策略，以应对不可预测的降雨。
We compared the mortality of quiescent female deutonymphs and adult females of the kanzawa spider mite, Tetranychus kanzawai, on leaf-discs that received simulated rain. The mortality of adult females was significantly higher than that of quiescent nymphs under the simulated rain. This may be due to a difference in water tolerance between the two stages, because the mortality rate did not differ in the absence of the simulated rain. The quiescent period was extended under increased moisture caused by the rain, and the quiescent deutonymphs emerged in response to a decrease in moisture. This plasticity in development seemed to ensure their molting safely after rainfall. The presence of both active and quiescent stages in the life cycle may function as a bet-hedging strategy against unpredictable rain.