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首页> 外文期刊>Ethology >Ultrasonic Reaction of Bank Vole Males to the Presence of Females Varying in Hormonal Activity
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Ultrasonic Reaction of Bank Vole Males to the Presence of Females Varying in Hormonal Activity

机译：银行田鼠雄性对雌性激素活性变化的超声反应

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摘要

Rodents are known to emit ultrasounds during social interactions. Despite the evidence that ultrasonic vocalizations are emitted during sexual encounters and may play a certain role in sexual selection, only a few studies have investigated this phenomenon, mainly in laboratory rodents. We analysed the ultrasonic calls of bank vole (Myodes glareolus) males from an outbred colony in the presence of females differing in hormonal activity. Sexually experienced males were tested during interactions with naive, ovariectomized, pregnant and post-partum oestrous females. We found that the males' ultrasound vocalizations depend on the phase of the bank vole females' reproductive cycle. During encounters with post-partum oestrous females the males emitted significantly more ultrasounds, and the total duration of ultrasound vocalization was longer. The presence of post-partum oestrous females also influenced the type of ultrasounds: the most typical constant-frequency sounds were significantly shorter, and two additional types of ultrasounds were presented during interactions with females ready to mate: U-shaped frequency-modulated sounds and frequency-modulated upsweep sounds. To our knowledge this is the first evidence that male voles of the subfamily Arvicolinae emit different types of ultrasounds in the presence of females depending on their reproductive stage. We suggest that these ultrasounds may be employed as an attractant during reproductive behaviour and that they are potentially an element of sexual selection.
机译：已知啮齿动物会在社交互动中发出超声波。尽管有证据表明性交时会发出超声波发声，并且可能在性选择中起一定作用，但只有少数研究主要在实验室啮齿类动物中研究了这种现象。我们分析了在雌性激素活性不同的情况下，来自近交群体的岸田鼠（Myodes glareolus）雄性的超声波。在与幼稚，去卵巢，怀孕和产后雌性雌性交往的过程中，对有性经历的雄性进行了测试。我们发现，雄性动物的超声发声取决于雌鼠繁殖周期的阶段。在与产后雌性雌虫相遇时，雄性发出的超声波明显更多，并且发声的总时间更长。产后雌性雌性的存在也​​影响了超声的类型：最典型的恒定频率声音明显更短，并且在与准备交配的雌性互动时还出现了两种其他类型的超声：U形调频声和调频的上扫声音。据我们所知，这是第一个证据表明，弓形亚科的雄性田鼠在雌性的情况下会根据其生殖阶段发出不同类型的超声波。我们建议这些超声波可以在生殖行为期间用作引诱剂，并且它们潜在地是性选择的要素。

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