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作 者 ：程惊秋

期 刊 ：林业科学 1993年 29卷 4期 页码：307-312

关键词：天牛科；幼虫；声行为；

Keywords:Cerambycidae, Larva, Acoustic behavior,

摘 要 ：对寄主木段中的桔褐天牛Nadezhdiella cantori(Hope)幼虫、桑粒肩天牛Apriona germari(Hope)幼虫的声行为进行了研究。天牛幼虫在寄主内可因取食、爬行活动而产生沿寄主传导的固体声。与爬行声相比,幼虫取食声的振幅大、持续时间短(约60ms)、间歇发出,振动频率可达700Hz;爬行声的振幅小、持续时问可达数百毫秒、可连续发出,振动频率低于300Hz。取食声信号因天牛幼虫的种类和寄主的种类不同而有明显差别。桔褐天牛幼虫取食声功率谱为准谐型,谱带2(B₂)为主能量带,其主峰频率(MPF=424±43Hz)约为B_1的MPF的1.8倍频。桑粒肩天牛幼虫取食声功率谱多为非谐型,大多数被测信号多以谱带1为主能量带(81%),不同木段中幼虫取食声谱带1的MPF分别为359±23Hz和293±26Hz。

Abstract:The types and the characters of acoustic behaviors by larvae living in host timbers in the longhorned beetles, Nadezhdiella cantori (Hope) and Apriona germari (Hope), were studied. In larval living hosts, vibrational sounds areproduced by their feeding and crawling activities. In feeding sounds, the pulsetrain (PT) has higher amplitude but shorter lasting (about 60ms) of time, andthe maximum vibration frequency may reach to 700Hz. While in crawlingsounds, the PT has lower amplitude but longer lasting (100-300ms), and themaximum frequency is lower than 300Hz. The frequency analysis revealed thatthe feeding sounds are different between two species. The power-spectrum offeeding sounds in N. cantori consists of two peaks and the second one (MPF424+43Hz, n=13) takes the main part of signal energy. Though the spect-rum of feeding sounds in A. germari is also formed mainly by two peaks,the signal energy is given by the first peak (MPF=359+23Hz, n=16, timberⅠ; MPE=293+26Hz, n=24, timber Ⅱ) principally. Liited by detecting techniques, the characters of this larval produced solid-born sounds could notbe determined precisely here.

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