Auditory masking of anuran advertisement calls by road traffic noise
Auditory masking of anuran advertisement calls by road traffic noise
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DOI：
10.1016/j.anbehav.2007.03.019
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发表时间：
2007-12-01
期刊：
影响因子：
2.5
通讯作者：
Swanson, Eli M.
中科院分区：
文献类型：
--
作者：
Bee, Mark A.;Swanson, Eli M.
越来越多的人担心，人为噪声可能会干扰动物的行为，掩盖了声音通信信号的感知。然而，到目前为止，很少有实验研究已经验证了这一普遍假设。人为噪声的一个常见来源是道路交通的声音。我们测试的假设，道路交通噪音可以掩盖女性的感知男性信号的灰色树蛙，Hyla chrysoscelis，通过比较的影响，交通噪音和背景噪音的繁殖合唱团对女性的反应，广告电话。在这个物种中，广告呼叫是必要的，足以吸引女性进行繁殖。使用趋声性分析，我们提出了女性的广告呼叫广播在九个信号水平（37 - 85分贝，6分贝的步骤）在三个掩蔽条件之一：（1）没有掩蔽噪声，（2）噪声模拟一个中等密度的繁殖合唱，或（3）噪声建模后，在两个湿地附近的主要道路记录的道路交通噪声。女性表现出类似的增加反应潜伏期和减少朝向目标信号的存在下，合唱噪音和traf。c噪声掩蔽器。此外，反应阈值升高了约20 - 25分贝的存在下，两个噪声掩蔽相比，未掩蔽的条件。我们的研究结果表明，现实水平的交通噪音可以限制一些动物的声学信号的活动空间。(c)2007年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
There is growing concern that anthropogenic noise could interfere with animal behaviours by masking the perception of acoustic communication signals. To date, however, few experimental studies have tested this general hypothesis. One common source of anthropogenic noise is the sound of roadway traffic. We tested the hypothesis that road traffic noise can mask a female's perception of male signals in the grey treefrog, Hyla chrysoscelis, by comparing the effects of traffic noise and the background noise of a breeding chorus on female responses to advertisement calls. In this species, advertisement calls are necessary and sufficient to attract females for breeding. Using a phonotaxis assay, we presented females with an advertisement call broadcast at one of nine signal levels (37 - 85 dB, 6-dB steps) in one of three masking conditions: (1) no masking noise, (2) a noise simulating a moderately dense breeding chorus, or (3) a noise modelled after road traffic noise recorded in two wetlands near major roads. Females showed similar increases in response latency and decreases in orientation towards the target signal in the presence of both the chorus noise and the traf. c noise maskers. Moreover, response thresholds were elevated by about 20 - 25 dB in the presence of both noise maskers compared to the unmasked condition. Our results suggest that realistic levels of traffic noise could place constraints on the active space of the acoustic signals of some animals. (c) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.