Auditory sensitivity of an acoustic parasitoid (Emblemasoma sp., Sarcophagidae, Diptera) and the calling behavior of potential hosts
Auditory sensitivity of an acoustic parasitoid (Emblemasoma sp., Sarcophagidae, Diptera) and the calling behavior of potential hosts
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DOI：
10.1159/000139458
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发表时间：
2008-01-01
影响因子：
1.7
通讯作者：
Hoy, R. R.
中科院分区：
文献类型：
--
作者：
Farris, H. E.;Oshinsky, M. L.;Hoy, R. R.
利用野外广播的模式男性呼叫歌曲，我们测试是否Tibicen pruinosa和T。叶蝉属（半翅目：蝉科）是声寄生蝇类的候选寄主。T. pruinosa吸引了90%的苍蝇（麻蝇科：Emblemasoma sp.;所有幼虫寄生的女性），当与模型T同时广播时。chloromera歌曲，一个phonotactic偏见再次确认在单一的歌曲播放。在T型车的配对广播中。在具有不同相对振幅（3 dB或6 dB）的pruinosa歌声中，显著更多的苍蝇被更强有力的歌声吸引，这一结果与Forrest和Raspet [ 1994]提出的模型预测的反应一致。使用细胞内录音和染料注射，我们的特点是在声音诱捕苍蝇的听觉单位的敏感性。来自6个听觉单位（5个中间神经元，1个传入神经元）的细胞内记录显示，对3-4 kHz附近的频率具有最佳灵敏度，与两种蝙蝠的叫声的主要光谱成分相匹配。有趣的是，虽然苍蝇可以被吸引到T。pruinosa全天广播，每小时对鸣叫的雄性进行的普查显示，鸣叫只发生在黄昏。此外，T。pruinosa的中午合唱明显短于T.绿蝇我们建议，黄昏合唱时间的紧密时间聚集可以起到降低风险的吸引寄生蜂。版权所有（c）2008 S. Karger AG，巴塞尔。
Using field broadcasts of model male calling songs, we tested whether Tibicen pruinosa and T. chloromera ( Hemiptera: Cicadidae) are candidate hosts for acoustic parasitoid flies. The model calling song of T. pruinosa attracted 90% of the flies (Sarcophagidae: Emblemasoma sp.; all larvapositing females) when broadcast simultaneously with the model T. chloromera song, a phonotactic bias reconfirmed in single song playbacks. In paired broadcasts of model T. pruinosa songs with different relative amplitudes ( 3 dB or 6 dB), significantly more flies were attracted to the more powerful song, a result consistent with the responses predicted by a model proposed by Forrest and Raspet [ 1994]. Using intracellular recordings and dye injections, we characterized the sensitivity of auditory units in sound-trapped flies. Intracellular recordings from six auditory units (5 interneurons, 1 afferent) revealed best sensitivity for frequencies near 3-4 kHz, matching the predominant spectral components of the calling songs of both species of cicada. Interestingly, although flies could be attracted to T. pruinosa broadcasts throughout the day, hourly censuses of singing males revealed that calling occurred exclusively at dusk. Further-more, the duration of the dusk chorus in T. pruinosa was significantly shorter than the midday chorus of the less attractive song of T. chloromera. We propose that the tight temporal aggregation of the dusk chorus time could function to reduce risk from attracted parasitoids. Copyright (c) 2008 S. Karger AG, Basel.