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.

由于捕食是对猎物的强烈选择压力，后来又演化出多种反捕食行为。假死被认为是一种反捕食者的行为，通过暂时停止运动并表现出死亡来逃避捕食。先前的研究表明，假死的持续时间和频率随温度而变化。体色也可能通过热适应影响这些参数，因为体色与温度适应有显着关系。瓢虫，异色瓢虫，显示鞘翅颜色的多态性，由单个基因座上的 12 个等位基因控制。鞘翅颜色可分为 1) 红色带黑点 (Red type; R) 和 2) 黑色带红色点 (Black type; B)。在这里，我们表明 B 中假死的持续时间与温度呈正相关，而 R 中的假死持续时间与温度呈负相关。这种差异的进化原因需要进一步研究与假死相关的机会成本与假死持续时间的收益之间的权衡。