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Temperature-dependent parameters of stridulatory signals in the four-eyed fir bark beetle, Polygraphus proximus (Coleoptera: Curculionidae: Scolytinae)
Journal of Asia-Pacific Entomology ( IF 1.5 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.aspen.2020.01.011
Ivan A. Kerchev

Acoustic signals are an essential part of the multi-modal systems of conspecific communication among insects. The patterns of abiotic factors effects on their communication parameters are of great interest for prognostic purposes in current climatic instability and for practical application in order to manage their populations.

The aim of this study was to reveal the dependence of the parameters of acoustic signals produced by bark beetle Polygraphus proximus, an aggressive alien stem pest on the environmental temperature. Male stridulatory signals were recorded in seven temperature settings (5–35 °C), and changes in their temporal parameters were evaluated under laboratory conditions.

The obtained results allowed us to reveal the pattern of temperature dependence of signals produced by P. proximus. More than half of the insects were found to actively stridulate at 5 °C. Raising temperature caused an increment in chirp rate that continued to increase up to 30 °C. Further temperature increase led to suppression of signaling in most of the tested males. The obtained results showed a number of patterns of temperature effect on the parameters of acoustic signals which might be universal for representatives of different bark beetles genera with various stridulatory apparatus types.



中文翻译:

四眼杉木树皮甲虫(Polygraphus proximus)(鞘翅目:Curculionidae:Scolytinae)中刺激信号的温度相关参数

声音信号是昆虫之间特定通信的多模式系统的重要组成部分。对于当前气候不稳定的预后目的以及为管理其种群而实际应用而言,非生物因子对其交流参数的影响方式引起了极大的兴趣。

这项研究的目的是揭示树皮甲虫Polygraphus proximus(一种侵略性外来茎类害虫)产生的声信号参数对环境温度的依赖性。在七个温度设置(5–35°C)中记录了男性癫痫发作信号,并在实验室条件下评估了它们的时间参数变化。

获得的结果使我们揭示了由棒状对虾产生的信号与温度的关系。发现超过一半的昆虫在5°C时活跃活跃。升高温度会导致线性调频脉冲频率的增加,直到30°C为止。温度的进一步升高导致大多数被测雄性动物的信号传导受到抑制。获得的结果表明,温度对声信号参数的影响规律很多,这对于具有不同扼流器类型的不同树皮甲虫属的代表可能是通用的。

更新日期:2020-01-25
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