PDF(Pubmed)
Abstract：
In this experiment, we studied a rodent model selected over 57 generations for high or low rates of ultrasonic vocalizations (USVs) during maternal separation as pups. We investigated the influence of this breeding on the adult animals\' subsequent vocal output, comparing acoustic variables across developmental stages. We hypothesized that selection on pup USV rate would impact adult USV production without affecting lower frequency calls. Contrary to this hypothesis, we found neither number of USV calls or other acoustic variables to differ among selected adult lines. Instead, we found that pup USV selection mainly affected adults\' low-frequency (human-audible) calls. Furthermore, low-frequency vocalizations did not fully fit a predicted correlation between body weight and fundamental frequency: high line males, although the heaviest on average, did not produce the lowest fundamental frequencies. Our findings suggest that selection for early ultrasonic vocal behaviour pleiotropically results in changes in anatomical production mechanisms and/or neural control affecting low-frequency calls.
摘要：
在这个实验中,我们研究了一个啮齿动物模型，该模型选择了57代以上，在母系分离期间，超声发声（USV）的发生率高或低。我们调查了这种繁殖对成年动物随后的声音输出的影响，比较不同发育阶段的声学变量。我们假设幼犬USV率的选择会影响成年USV的产生，而不会影响低频呼叫。与这个假设相反,我们发现在选定的成人行之间,USV呼叫数或其他声学变量均无差异.相反，我们发现幼犬USV选择主要影响成人的低频(人类可听到的)呼叫。此外，低频发声并不完全符合体重和基频之间的预测相关性：高线男性，虽然平均来说最重，没有产生最低的基本频率。我们的发现表明，多向性选择早期超声发声行为会导致解剖产生机制和/或神经控制的变化，从而影响低频呼叫。
