Selective phonotaxis of female crickets under natural outdoor conditions.
Selective phonotaxis of female crickets under natural outdoor conditions.
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DOI：
10.1007/s00359-014-0881-7
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发表时间：
2014-03
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影响因子：
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通讯作者：
Römer H
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作者：
Hirtenlehner S;Römer H
在实验室条件下，利用不同的行为范式对昆虫的声学择偶进行了广泛的研究。然而，理想情况下，配对选择设计应该反映自然条件，包括信号传输通道的物理特性。由于鲜为人知的是，在自然条件下的男性歌曲变体之间的女性的辨别能力，我们进行了phonotaxis实验与女性田间蟋蟀（Gryllus bimaculatus）户外，使用两个选择的决定的基础上的差异，载波频率，声压级，和啁啾率。对于所有三个歌曲参数，两个歌曲模型之间的显着偏好所需的最小差异是相当大的室外实验室条件下相比。在现场进行重要选择所需的最小幅度差为5 dB，而基于实验室的实验仅报告了1-2 dB。由于调谐接收器系统，载波频率的差异等于感知响度的差异，并且载波频率差异的选择结果证实了振幅的差异。类似地，与实验室中仅20啁啾/分钟相比，室外需要50啁啾/分钟的啁啾速率差异。对于性选择模式的预测，未来的研究需要考虑实验室和田间试验中配偶选择决定的不同结果。
Acoustic mate choice in insects has been extensively studied under laboratory conditions, using different behavioural paradigms. Ideally, however, mate choice designs should reflect natural conditions, including the physical properties of the transmission channel for the signal. Since little is known about the discrimination ability of females between male song variants under natural conditions, we performed phonotaxis experiments with female field crickets (Gryllus bimaculatus) outdoors, using two-choice decisions based on differences in carrier frequency, sound pressure level, and chirp rate. For all three song parameters, minimum differences necessary for a significant preference between two song models were considerably larger outdoors compared to laboratory conditions. A minimum amplitude difference of 5 dB was required for a significant choice in the field, compared to only 1–2 dB reported for lab-based experiments. Due to the tuned receiver system, differences in carrier frequency equal differences in perceived loudness, and the results on choice for differences in carrier frequency corroborate those in amplitude. Similarly, chirp rate differences of 50 chirps/min were required outdoors compared to only 20 chirps/min in the lab. For predictions about patterns of sexual selection, future studies need to consider the different outcomes of mate choice decisions in lab and field trials.