Relationship Between the Duration of Death Feigning and Temperature in Black and Red Elytral Types of a Polymorphic Ladybug, Harmonia axyridis
Relationship Between the Duration of Death Feigning and Temperature in Black and Red Elytral Types of a Polymorphic Ladybug, Harmonia axyridis
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异色瓢虫黑色和红色鞘翅型假死持续时间与温度的关系
DOI：
10.1007/s10905-022-09795-3
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发表时间：
2022
期刊：
影响因子：
1
通讯作者：
Eisuke Hasegawa
中科院分区：
文献类型：
--
作者：
Tatsumi Kudo;Eisuke Hasegawa
由于捕食是对猎物的一种强烈的选择压力，所以后来进化出了各种各样的反捕食行为。假死被认为是一种通过暂时停止运动并表现出死亡的状态来逃避捕食者的行为。先前的研究表明，假死的持续时间和频率随着温度的变化而变化。身体颜色也可能通过热适应影响这些参数，因为身体颜色与温度适应有显着关系。异色瓢虫鞘翅颜色的多态性受同一基因座上的12个等位基因控制。鞘翅的颜色可分为1）红色带黑色斑点（红色型; R）和2）黑色带红色斑点（黑色型; B）。在这里，我们发现，在B假死的持续时间与温度呈正相关，而在R呈负相关。这种差异的进化原因需要进一步研究，在与假死相关的机会成本和假死持续时间的好处之间进行权衡。
Since predation is a strong selection pressure on prey, the later have evolved a variety of anti-predator behavior. Death-feigning is thought as one of anti-predator behaviors to escape from predation by temporarily stopping movement and appearing to be dead. Previous studies have shown that the duration and frequency of death-feigning varies with temperature. Body color may also affect those parameters through thermal adaptation, as body color would have a significant relationship with temperature adaptation. A ladybug,Harmonia axyridis, shows a polymorphism in elytral color, which is controlled by 12 alleles on a single locus. The elytral color can be divided into 1) red with black spots (Red type; R) and 2) black with red spots (Black type; B). Here, we show that the duration of death-feigning in B was correlated positively with temperature whereas that in R was correlated negatively with temperature. The evolutionary reasons for this difference require further study in terms of the trade-off between the opportunity cost associated with death-feigning and the benefit of the duration of death-feigning.