Orangutan long call degradation and individuality over distance: A playback approach
Orangutan long call degradation and individuality over distance: A playback approach
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DOI：
10.1007/s10764-008-9253-x
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发表时间：
2008-06-01
影响因子：
2.5
通讯作者：
Wich, Serge A.
中科院分区：
文献类型：
--
作者：
Lameira, Adriano R.;Wich, Serge A.
研究人员已经记录了几种灵长类动物的个体声音识别，但不知道随着距离的推移可能发生的声学参数的变化是否会影响与个体有关的呼叫的信息内容。因此，我们进行了播放实验，使用雄性猩猩长途电话（长电话），并重新记录他们在距离源越来越远。我们的目标是确定1）哪些声学参数随距离变化，以及2）判别分析分配给正确个体的呼叫百分比是否会随距离变化。高频谐波随着距离的增加而衰减和丢失，但其他参数没有变化。分配给正确个体的呼叫的百分比并不随距离而改变，这表明即使随着距离的推移有一些声学变化，其他个体识别呼叫者的机会仍然相似，直到
Researchers have documented individual vocal recognition in several primate species but do not know whether the changes in acoustical parameters that might occur over distance influence the informational content of a call that relates to individuality. Accordingly, we performed playback experiments using male orangutan long-distance calls (long calls) and rerecorded them at increasing distances from the source. We aimed to determine 1) which acoustical parameters changed over distance and 2) whether the percentage of calls that a discriminant analyses would assign to the correct individual would change over distance. High-frequency harmonics were attenuated and lost with increasing distance, but other parameters did not change. The percentage of calls assigned to the correct individual did not change over distance, indicating that even though there are some acoustical changes over distance the opportunity for other individuals to recognize the caller remains similar until