Anti-predator behaviour depends on male weapon size
Anti-predator behaviour depends on male weapon size
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DOI：
10.1098/rsbl.2020.0601
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发表时间：
2020-12-23
期刊：
影响因子：
3.3
通讯作者：
Miyatake, Takahisa
中科院分区：
文献类型：
--
作者：
Matsumura, Kentarou;Yumise, Kota;Miyatake, Takahisa
强直不动和逃跑是许多动物用来抵御捕食者的适应性策略。逃避需要运动，而强身不动则不需要。如果对抗捕食者的策略与武器大小有关，拥有较大武器的雄性可能会采取强身不动的策略，而拥有较小武器的雄性可能会采取逃跑的策略。然而，没有研究调查武器大小和反捕食者战术之间的关系。本研究研究了角爪甲虫（Gnathocerus cornutus）雄性武器大小与强直不动的关系。结果表明，拥有较大武器的雄性更容易出现强直不动。虽然大多数关于甲虫强直不动的研究都集中在持续时间上，而不是频率上，但强直不动的持续时间并不受武器大小的影响。因此，据我们所知，这项研究首次表明，男性武器特质会影响反捕食者战术。
Tonic immobility and escape are adaptive anti-predator tactics used by many animals. Escape requires movement, whereas tonic immobility does not. If anti-predator tactics relate to weapon size, males with larger weapons may adopt tonic immobility, whereas males with smaller weapons may adopt escape. However, no study has investigated the relationship between weapon size and anti-predator tactics. In this study, we investigated the relationship between male weapon size and tonic immobility in the beetle Gnathocerus cornutus. The results showed that tonic immobility was more frequent in males with larger weapons. Although most studies of tonic immobility in beetles have focused on the duration, rather than the frequency, tonic immobility duration was not affected by weapon size in G. cornutus. Therefore, this study is the first, to our knowledge, to suggest that the male weapon trait affects anti-predator tactics.