摘要
对鼠耳蝠属两种蝙蝠飞行状态下的声发射进行了比较研究。结果表明 :两种鼠耳蝠声发射信号的声谱图都呈调频 (FM)型 ,但在波形及频率范围上有明显差异。大鼠耳蝠(四川亚种 )的声脉冲宽度很小 ( 1 6± 0 3ms) ,能率环较低 ( 4 0 % ) ,其主频率 (DF =44 6± 4 3kHz)也较低 ;而水鼠耳蝠的声脉冲宽度较大 ( 4 2± 1 6ms) ,能率环 ( 9 6% )及主频率 (DF =83 0± 4 0kHz)也较高。
The echolocation behaviors of two species of Myotis bats were compared when they flied Results revealed that: the sonagrams of the two bats were both FM form, but they had obvious difference in the structure of sonagram and frequency range The call duration of Myotis myotis luctuosus was shorter in the two species of bats (1 6±0 3 ms), its duty cycle was lower(4 0%), and its DF ( Dominant frequency ) was lower too (44 6±4 3 kHz) On the other hand, Myotis daubentoni ′s call duration was longer (4 2±1 6 ms), its duty cycle (9 6%) and DF (83 0±4 0 kHz) were higher as well The adaptations of echolocation to habitat and foraging strategy were also analyzed with a view to morphology and preys of these two species of myotis
出处
《兽类学报》
CAS
CSCD
北大核心
2001年第4期259-263,共5页
Acta Theriologica Sinica
基金
国家自然科学基金资助项目 (3 0 0 70 1 0 8)
中国科学院"生命科学与生物技术创新青年科学家小组"资助项目
关键词
鼠耳蝠
回声定位
捕食策略
比较
叫声
Myotis
Echolocation
Foraging strategy
Comparative study
