Echolocation behavior of big brown bats, Eptesicus fuscus, in the field and the laboratory
Echolocation behavior of big brown bats, Eptesicus fuscus, in the field and the laboratory
复制标题
DOI：
10.1121/1.1315295
复制
发表时间：
2000-11-01
影响因子：
2.4
通讯作者：
Moss, CF
中科院分区：
文献类型：
--
作者：
Surlykke, A;Moss, CF
回声定位信号是由在野外和实验室飞行的大棕蝠（Eptesicus fuscus）记录的。在开放区域，搜索信号的脉冲间间隔 (IPI) 约为 134 毫秒或该值的两倍，即 270 毫秒。在长 IPI 下，信号持续时间长（14 至 18-20 毫秒）、带宽窄且频率低，扫描至 22-25 kHz 的最小频率 (F-min)。在短 IPI 下，信号更短（6-13 毫秒）、频率更高、带宽更宽。 Tn 树木繁茂的区域仅以较高的速率（平均 IPI = 122 ms）和较高的 F-min（27-30 kHz）发射较短（6-11 ms）的相对宽带搜索信号。在实验室中，IPI 甚至更短（88 ms），持续时间为 3-5 ms，F-min 30-35 kHz，类似于现场记录的接近相位信号。除末相信号外，所有区域的所有信号均表现出信号持续时间与F-min之间的负相关关系，即信号越短，F-min越高。这种相关性在昆虫捕获序列的末期发生逆转，其中 F-min 随着信号持续时间的减少而减少。总体而言，与实验室记录的信号相比，现场记录的信号更长，IPI 更长，带宽变化更大。 (C) 2000 年美国声学学会。 [S0001-4966(00)03611-0]。
Echolocation signals were recorded from big brown bats, Eptesicus fuscus, flying in the field and the laboratory. In open field areas the interpulse intervals (IPI) of search signals were either around 134 ms or twice that value, 270 ms. At long IPI's the signals were of long duration (14 to 18-20 ms), narrow bandwidth, and low frequency, sweeping down to a minimum frequency (F-min,) of 22-25 kHz. At short IPI's the signals were shorter (6-13 ms), of higher frequency, and broader bandwidth. Tn wooded areas only short (6-11 ms) relatively broadband search signals were emitted at a higher rate (avg. IPI = 122 ms) with higher F-min (27-30 kHz). In the laboratory the IPI was even shorter (88 ms), the duration was 3-5 ms, and the F-min 30-35 kHz, resembling approach phase signals of field recordings. Excluding terminal phase signals, all signals from all areas showed a negative correlation between signal duration and F-min,, i.e., the shorter the signal, the higher was F-min. This correlation was reversed in the terminal phase of insect capture sequences, where F-min, decreased with decreasing signal duration. Overall, the signals recorded in the field were longer, with longer IPI's and greater variability in bandwidth than signals recorded in the laboratory. (C) 2000 Acoustical Society of America. [S0001-4966(00)03611-0].