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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 27, No. 3, 2006, pp. 235-241
Bioline Code: zr06033
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 27, No. 3, 2006, pp. 235-241

 en Characteristics of Echolocation Calls and Summer Diet of Three Sympatric Insectivorous Bats Species
WEI Li, ZHOU Shan-yi, ZHANG Li-biao, LIANG Bing, HONG Ti-yu, ZHANG Shu-yi

Abstract

From June to September, 2005, we compared echolocation calls, the summer diet and morphologic features of three bats species ( Myotis siligorensis check for this species in other resources , Rhinolophus pusillus check for this species in other resources and Taphozous melanopogon check for this species in other resources ) captured in two caves around Guilin city, Guangxi province, China. We got the following results: (1) Echolocation calls of T. melanopogon are lower modulated frequency (FM), with dominant frequency (32.84±1.17)kHz, and multi-harmonics (usually with four harmonics). This species has the largest body size, highest ratio of wing length to wing width and highest wing loading. This species is adapted to fly fast and forage for larger insects in open area such as those in treetops and above farmland. (2) The echolocation calls of M. siligorensis are FM. Their dominant frequency (84.44±8.13)kHz is higher than T. melanopogon. They have smaller body size, lower ratio of wing length to wing width and lower wing loading which are adapted to fly slower but are more manoeuvrable and suited to forage for small insects. (3) The echolocation calls of R. pusillus are long FM-CF-FM and their dominant frequency (110.78±1.65)kHz is the highest among these three species. R. pusillus and M. siligorensis have similar morphology with similar flight ability and manoeuvrability therefore they forage in similar habitat. In conclusion, these bats species differ from each other obviously in echolocation calls and diets, which lead to their conspicuously partitioned niches.

Keywords
Myotis siligorensis; Rhinolophus pusillus; Taphozous melanopogon; Echolocation call; Diet; Niche partitioning

 
© Copyright 2006 Kunming Institute of Zoology, the Chinese Academy of Sciences
Alternative site location: http://www.zoores.ac.cn/

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