Latitudinal cline of death-feigning behaviour in a beetle (Tribolium castaneum)
Latitudinal cline of death-feigning behaviour in a beetle (Tribolium castaneum)
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DOI：
10.1098/rsbl.2023.0028
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发表时间：
2023-03
期刊：
影响因子：
3.3
通讯作者：
Kentarou Matsumura;T. Miyatake
中科院分区：
文献类型：
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作者：
Kentarou Matsumura;T. Miyatake
假装死亡行为是一种现象，猎物由于受到捕食者的刺激或威胁而一动不动。这种反捕食者防御机制已经在许多动物类群中被观察到，并且被认为是自然界的适应性机制。然而，假死持续时间的延长会导致捕食和繁殖机会的减少，因此与没有捕食者的环境相比，通常与适应成本有关。人们还观察到不同人群中假装死亡的频率和持续时间的差异，这些差异被认为是受到生存成本和其他适应成本之间平衡的影响。此外，预计这种平衡会随着环境条件的变化而变化。本研究对38个种群的红粉甲虫（Tribolium castaneum）进行了死亡假象调查。我们的研究结果表明，castaneum假死的频率和持续时间表现出地理变化和纬度变化，表明这种行为受到地点和纬度的影响。这项研究首次证明了假死行为存在纬度差异，并表明假死行为可能是根据不同纬度的环境因素进化而来的。
Death-feigning behaviour is a phenomenon in which a prey is rendered motionless due to stimulation or threat from a predator. This anti-predator defence mechanism has been observed across numerous animal taxa and is considered adaptive in nature. However, longer durations of death feigning can result in decreased opportunities for feeding and reproduction, and therefore is often associated with fitness costs as compared to environments without predators. Differences have also been observed in the frequencies and durations of death feigning within populations, and these differences are thought to be influenced by the balance between survival and other fitness costs. Furthermore, this balance is predicted to vary in response to changes in environmental conditions. In this study, we examined the death feigning in 38 populations of the red flour beetle (Tribolium castaneum). Our results demonstrate that frequencies and durations of the death feigning in T. castaneum show geographical variations and a latitude cline, indicating that this behaviour is influenced by location as well as latitude. This study is the first to demonstrate the existence of a latitudinal cline in death feigning and suggests that death-feigning behaviour might have evolved in response to environmental factors that vary with latitude.