中文摘要：

在12m×4m×4m的围网内录制大趾鼠耳蝠（Myotis macrodactylus）飞行与悬挂状态下的回声定位声波，使用双尾t-检验对不同状态下的声波参数进行差异显著性分析。结果表明，大趾鼠耳蝠回声定位声波为短的、宽带的且能量主要集中在第1谐波的调频型声波，伴有1—2个谐波。第1谐波起始频率、带宽和声脉冲间隔在飞行与悬挂状态下具有显著差异（P〈0．05）。回声定位声波飞行状态下的第1谐波终止频率、带宽、声脉冲持续时间和声脉冲间隔均存在性别差异，而主频率没有显著的性别差异。回声定位声波的这些特征及差异体现了对其捕食生境、捕食策略及通讯行为的适应。

英文摘要：

The present study was conducted at Dalazi Cave in Ji＇an City of southern Jilin Province of China from May 1^st 2008 to May 28^th 2008. We recorded and analyzed the echolocation calls of Myotis macrodactylus using ultrasound detector （Ultra Sound Gate 116, Avisoft Bioaeoustics, Berlin, Germany） and Batsound 3.10 （Pettersson Eleetronik AB, Sweden）, respectively. During flight, M. macrodactylus used short echolocation calls dominated by frequency- modulated （FM） components （1 -2 harmonies）, with peak frequency of 54.14±3.29 kHz,pulse duration of 3.01 ± 0.60 ms, inter-pulse interval of 62.87 ± 8.89 ms, and the duty cycle of 4.65 % ±1.12 % . Two-tailed t-test analysis of variance indicated significant difference existed in some paramcters between echolocation calls produced during flight and hanging, such as the starting frequency of the 1^st harmonic, bandwidth and inter-pulse interval. Except the dominant frequency, terminal frequency of 1^st harmonic, bandwidth, pulse duration and inter-pulse interval during flight were significantly different between females and males. Different characteristics of echolocation calls in M. rnacrodactylus at different status might result from their adaptation to foraging strategies, habitats and communication.