Arousal from death feigning by vibrational stimuli: comparison of Tribolium species
Arousal from death feigning by vibrational stimuli: comparison of Tribolium species
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DOI：
10.1007/s10164-020-00680-0
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发表时间：
2020-10-20
影响因子：
0.9
通讯作者：
Miyatake, Takahisa
中科院分区：
文献类型：
--
作者：
Ishihara, Ryo;Matsumura, Kentarou;Miyatake, Takahisa
假装死亡（或强身不动）是一种有效的对抗捕食者的策略。然而，长时间在地面上静止不动会增加被寄生或被捕食者吃掉的风险，因此，当提供适当的刺激时，昆虫必须唤醒自己。关于刺激强度对假死唤醒的影响的研究很少。先前的一项研究表明，在假死中引起觉醒的刺激强度有一个现有的阈值。物种之间的觉醒阈值是否存在差异是一个有趣的问题。因此，在本研究中，我们比较了两个密切相关的物种，即T. confusum和T. freemani的刺激强度对假死唤醒的影响，这两个物种是人工选择的假死持续时间较长的菌株。此外，该研究的一部分是确定唤醒所需的刺激强度与假装死亡的持续时间之间是否存在正相关。我们讨论了为什么在不同的Tribolium物种中，从假装死亡中唤醒所需的刺激强度存在差异，为此我们包括了来自先前研究的T. castaneum的数据。
Death feigning (or tonic immobility) is an effective antipredator strategy. However, prolonged immobility on the ground increases the risk of being parasitized or eaten by predators, and thus, insects must rouse themselves when appropriate stimulation is provided. Very few studies on the effect of stimulus intensity on arousal from death feigning have been conducted. A previous study using Tribolium castaneum showed an existing threshold for the intensity of the stimulus that causes arousal from death feigning. Whether there are differences between species in the threshold for arousal is an interesting question. In the present study, we, therefore, compared the effect of stimulus strength on arousal from death feigning in two closely related species, namely, T. confusum and T. freemani, which are established strains that have been artificially selected for longer duration of death feigning. Also, part of the study was to determine whether there was a positive association between intensity of stimulus needed to rouse and the duration of death feigning. We discuss why there is a difference in the strength of the stimulus needed for arousal from death feigning among Tribolium species, for which we included the data for T. castaneum from a previous study.