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Could prenatal sound discrimination predict vocal complexity later in life?
BMC Zoology ( IF 1.4 ) Pub Date : 2018-10-29 , DOI: 10.1186/s40850-018-0038-1
Sonia Kleindorfer , Christine Evans , Mark E. Hauber , Diane Colombelli-Négrel

Greater complexity of the learned vocal repertoire has been shown to increase mating and territory defence success in songbirds. Vocal learning in some songbird species begins in the egg and these songbird embryos can discriminate the sounds of different birds. Here, we test if prenatal sound discrimination positively correlates with song complexity in the Superb Fairy-wren (Malurus cyaneus). We use a habituation/dishabituation approach in natural and cross-fostered nests to measure prenatal sound discrimination of female vocalisations and later quantify observed song repertoire in fledgling sons and daughters. Superb Fairy-wren fledglings produced learned songs consisting of 6–11 different elements by 12 weeks of age. Using multiple regression analysis, both prenatal sound discrimination strength and parental song complexity (total number of vocal elements) positively correlated with a fledgling’s song complexity. The number of parental vocal elements was unrelated to the embryos’ sound discrimination score. Prenatal sound discrimination strength was positively related to vocal complexity later in life. From previous research, we know that individuals with greater learned vocal complexity may have higher fitness. Therefore, characterizing the causes of prenatal sound discrimination can inform our understanding of fitness trajectories when phenotypes are shaped by learned cross-generational experience. Future research should explore causes of variance in prenatal sound discrimination.

中文翻译:

产前声音歧视能否预测出生活中后期的声音复杂性?

已显示,所学声乐库的复杂性更高,可以提高鸣禽的交配和区域防御的成功率。在某些鸣禽物种中,人声学习始于卵,而这些鸣禽胚胎可以区分不同鸟类的声音。在这里,我们测试了Superb Fairy-wren(Malurus cyaneus)中的产前声音辨别力是否与歌曲复杂度正相关。我们在自然巢穴和交叉寄养的巢穴中使用习惯化/异化处理方法来测量女性声母的产前声音辨别力,然后量化在刚出生的儿子和女儿中观察到的歌曲曲目。精湛的童话般的雏鸟在12周龄时就制作了由6至11种不同元素组成的博学歌曲。使用多元回归分析,产前声音的辨别力和父母的歌曲复杂度(人声成分的总数)都与雏鸟的歌曲复杂度呈正相关。父母声带的数量与胚胎的声音辨别力得分无关。产前声音的辨别力与生活后期的声音复杂度呈正相关。从以前的研究中,我们知道,具有较高学习声音的人可能具有更高的适应性。因此,当表型受学习的跨代经验影响时,表征产前声音歧视的原因可以帮助我们理解健身轨迹。未来的研究应探讨产前声音识别差异的原因。父母声带的数量与胚胎的声音辨别力得分无关。产前声音的辨别力与生活后期的声音复杂度呈正相关。从以前的研究中,我们知道,具有较高学习声音的人可能具有更高的适应性。因此,当表型受学习的跨代经验影响时,表征产前声音歧视的原因可以帮助我们理解健身轨迹。未来的研究应探讨产前声音识别差异的原因。父母声带的数量与胚胎的声音辨别力得分无关。产前声音的辨别力与生活后期的声音复杂度呈正相关。从以前的研究中,我们知道,具有较高学习声音的人可能具有更高的适应性。因此,当表型受学习的跨代经验影响时,表征产前声音歧视的原因可以帮助我们理解健身轨迹。未来的研究应探讨产前声音识别差异的原因。表征产前声音歧视的原因可以帮助我们了解表型由学到的跨代经验塑造的健身轨迹。未来的研究应探讨产前声音识别差异的原因。表征产前声音歧视的原因可以通过了解的跨代经验塑造表型,从而有助于我们了解健身轨迹。未来的研究应探讨产前声音识别差异的原因。
更新日期:2018-10-29
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