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Ultrasonic vocalizations in house mice depend upon genetic relatedness of mating partners and correlate with subsequent reproductive success.
Frontiers in Zoology ( IF 2.8 ) Pub Date : 2020-04-03 , DOI: 10.1186/s12983-020-00353-1
Doris Nicolakis 1 , Maria Adelaide Marconi 1 , Sarah M Zala 1 , Dustin J Penn 1
Affiliation  

Background Courtship vocalizations are used by males of many species to attract and influence the behavior of potential mating partners. Our aim here was to investigate the modulation and reproductive consequences of courtship ultrasonic vocalizations (USVs) in wild-derived house mice (Mus musculus musculus). The courtship USVs of male mice are surprisingly complex and are composed of a variety of different syllable types. Our specific aims were to test whether (1) the emission of courtship USVs depends upon the kinship of a potential mating partner, and (2) whether USV emission during courtship affects the pairs' subsequent reproductive success. Results We experimentally presented males with an unfamiliar female that was either genetically related or unrelated, and we recorded USV emission, first while the sexes were separated by a perforated partition and then during direct interactions, after removing the partition. USVs were detected by the Automatic Mouse Ultrasound Detector (A-MUD) and manually classified into 15 syllable types. The mice were kept together to test whether and how courtship vocalizations predict their subsequent reproductive success. We found that the mice significantly increased their amount of vocalizations (vocal performance) and number of syllable types (vocal repertoire) after the partition was removed and they began interacting directly. We show that unrelated pairs emitted longer and more complex USVs compared to related pairs during direct interactions. Unrelated pairs also had a greater reproductive success compared to related pairs, and in addition we found a negative correlation between the mean length and amount of vocalizations with the latency to their first litter. Conclusion Our study provides evidence that house mice modulate the emission of courtship USVs depending upon the kinship of potential mating partners, and that courtship USVs correlate with reproductive success.

中文翻译:

家鼠的超声波发声取决于交配伙伴的遗传相关性,并与随后的繁殖成功相关。

背景 许多物种的雄性使用求爱发声来吸引和影响潜在交配伙伴的行为。我们的目的是研究求爱超声波发声 (USV) 在野生家鼠 (Mus musculus musculus) 中的调制和生殖后果。雄性老鼠的求偶 USV 非常复杂,由多种不同的音节类型组成。我们的具体目标是测试 (1) 求偶 USV 的排放是否取决于潜在交配伙伴的亲属关系,以及 (2) 求偶期间的 USV 排放是否会影响对随后的繁殖成功。结果 我们实验性地向男性展示了一个不熟悉的女性,无论是遗传相关还是无关的,我们记录了 USV 排放,首先,两性被穿孔隔板隔开,然后在直接互动期间,在移除隔板后。USV 由自动鼠标超声检测器 (A-MUD) 检测并手动分类为 15 个音节类型。将老鼠放在一起以测试求偶发声是否以及如何预测它们随后的繁殖成功。我们发现,在移除分区并开始直接交互后,小鼠的发声量(发声表现)和音节类型(发声曲目)的数量显着增加。我们表明,在直接交互过程中,与相关对相比,不相关的对发出更长、更复杂的 USV。与相关配对相比,无关配对也有更大的繁殖成功率,此外,我们发现平均长度和发声量与其第一胎的潜伏期之间存在负相关。结论 我们的研究提供的证据表明,家鼠根据潜在交配伙伴的亲属关系调节求偶 USV 的发射,并且求偶 USV 与繁殖成功相关。
更新日期:2020-04-22
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