Phase variation in the Kanzawa spider mite, Tetranychus kanzawai Kishida (Acari: Tetranychidae)
Phase variation in the Kanzawa spider mite, Tetranychus kanzawai Kishida (Acari: Tetranychidae)
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神泽叶螨 (Tetranychus kanzawai Kishida) 的相变（蜱螨亚纲：Tetranychidae）
DOI：
10.1303/aez.2002.431
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发表时间：
2002
影响因子：
1.3
通讯作者：
A. Takafuji
中科院分区：
文献类型：
--
作者：
K. Oku;S. Yano;A. Takafuji
本文研究了神泽叶螨在密度效应和扩散能力方面的阶段变化。在幼鱼期，与年长雌成虫生活在一起的雌鱼繁殖力降低。这种负密度效应不是由高龄雌成虫的直接干扰造成的，而是由其取食损害引起的局部食物资源的改变。此外，与雌成虫一起发育的后代比没有雌成虫发育的后代具有更高的扩散能力。这种对局部密度的生理和行为可塑性可以被认为是一种相位变化。
We examined the phase variation in Tetranychus kanzawai Kishida with regard to density effects and dispersal capacity. The fecundity of females was reduced when they had lived together with senior female adults during the juvenile period was reduced. This negative density effect was not attributed to direct interference by the senior female adults, but to local alternation of the food resource caused by their feeding damage. Moreover, offspring that had developed with the female adults had a higher dispersal capacity than those that developed without female adults. This physiological and behavioral plasticity in response to local density can be considered as a kind of phase variation.