Mid-frequency suppression in the green treefrog (Hyla cinerea): mechanisms and implications for the evolution of acoustic communication.
Mid-frequency suppression in the green treefrog (Hyla cinerea): mechanisms and implications for the evolution of acoustic communication.
复制标题
绿色树蛙（Hyla cinerea）的中频抑制：声学通信进化的机制和影响。
DOI：
10.1007/s00359-005-0626-8
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Höbel,Gerlinde
中科院分区：
文献类型：
--
作者：
Gerhardt,HCarl;Höbel,Gerlinde
绿树蛙（Hyla cinerea）的广告叫声有两个以1khz和3khz为中心的光谱峰。在合成叫声中加入中频成分（1.8 kHz）会降低其对雌性的吸引力。这种中频抑制发生在20 db的回放级别范围内。在某些回放级别、某些地方和低于正常温度下，添加其他中频对偏好的影响较弱。这些效应与支配两栖动物乳头的一群低频调谐听觉神经元的反应特性密切相关。一种近缘种的雄蜂（H. gratiosa）发出的叫声频率在H.的抑制范围内。灰质;然而，在与该物种地理重叠区域之外的地方也发生了抑制。因此，先前关于中频抑制进化是为了增强物种歧视的猜测可能是不正确的。这种现象更可能反映了无尾动物和其他脊椎动物的一种普遍的感觉偏差，即音调对音调的抑制。这种负面偏见和其他抑制机制几乎肯定在通信系统的进化中发挥着重要作用，但却远不如增强信号吸引力的正面偏见受到关注。
Advertisement calls of green treefrogs (Hyla cinerea) have two spectral peaks centered at about 1 kHz and 3 kHz. Addition of a component of intermediate frequency (1.8 kHz) to a synthetic call reduced its attractiveness to females relative to an alternative lacking this component. This mid-frequency suppression occurred over a 20-dB range of playback levels. Addition of other intermediate frequencies had weak effects on preferences at some playback levels, in some localities, and at lower-than-normal temperatures. These effects correlate well with the response properties of a population of low-frequency-tuned auditory neurons innervating the amphibian papilla. Males of a closely related species (H. gratiosa) produce calls with emphasized frequencies within the range of suppression inH. cinerea; however, suppression also occurred in localities well outside the area of geographical overlap with this species. Thus, previous speculation that mid-frequency suppression evolved to enhance species discrimination is probably incorrect. This phenomenon is more likely to reflect a general sensory bias in anurans and other vertebrates, tone-on-tone inhibition. Such negative biases, and other inhibitory mechanisms, almost certainly play an important role in the evolution of communication systems but have received far less attention than positive biases that enhance signal attractiveness.