First record of underwater sound produced by the Balkan crested newt (Triturus ivanbureschi)

IF 0.6 4区 生物学 Q4 ZOOLOGY Acta Herpetologica Pub Date : 2020-05-17 DOI:10.13128/A_H-7863
Simeon Lukanov
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Abstract

This study presents first evidence for underwater sounds produced by adult Balkan crested newts (Triturus ivanbureschi). Recordings were made in spring of 2019 in controlled laboratory conditions using a commercially available omnidirectional hydrophone connected to a linear PCM recorder. A total of 27 animals (21 males, 6 females) were recorded under different conditions: (a) alone in an empty tank, (b) alone in a tank full of vegetation, and (c) a pair in an empty tank. Results indicated that both male and female newts produced a click-like sound with a mean duration of 34 ms (± 5.31 SD; range: 27-51) and mean peak frequency of 1887 Hz (± 405 SD; range: 1162-2770). Not all newts tested produced sounds and there were no statistically significant differences between males and females or recordings under different conditions in terms of click number, duration and frequency parameters, with the exception of the ratio of peak frequency/bandwidth at 50% peak amplitude, which was lower for clicks produced in the vegetated tank. Newt snout-vent length and body mass also had no effect on any of the studied parameters. The obtained results suggest that clicks could have a function in orientation and exploratory behaviour.
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巴尔干冠毛蝾螈(Triturus ivanburreschi)发出的第一个水下声音记录
这项研究首次为成年巴尔干冠蝾螈(Triturus ivanburgeschi)发出的水下声音提供了证据。2019年春天,在受控的实验室条件下,使用连接到线性PCM记录器的商用全向水听器进行了记录。在不同的条件下,共记录了27只动物(21只雄性,6只雌性):(A)单独在空水箱中,(b)单独在充满植被的水箱中,以及(c)一对在空水槽中。结果表明,雄性和雌性蝾螈都会发出咔哒声,平均持续时间为34毫秒(±5.31标准差;范围:27-51),平均峰值频率为1887赫兹(±405标准差,范围:1162-2770)。并非所有接受测试的蝾螈都会发出声音,雄性和雌性之间或不同条件下的记录在点击次数、持续时间和频率参数方面没有统计学上的显著差异,只有50%峰值振幅下的峰值频率/带宽比,这在植被覆盖的水槽中产生的点击更低。牛鼻喷口长度和体重对任何研究参数也没有影响。所获得的结果表明,点击可能在定向和探索行为方面发挥作用。
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来源期刊
CiteScore
1.20
自引率
12.50%
发文量
10
审稿时长
6 months
期刊介绍: Acta Herpetologica, a journal open to academics all over the world, offers itself as a new site for the presentation and discussion of the most recent results in the field of research on Amphibians and Reptiles, both living and extinct. The official journal of the Societas Herpetologica Italica (S.H.I.), Acta Herpetologica publishes original works – extended articles, short notes and book reviews – mostly in English, dealing with the biology and diversity of Amphibians and Reptiles.
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