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1 January 2012 High Trophic Similarity in the Sympatric North European Trawling Bat Species Myotis daubentonii and Myotis dasycneme
Frauke Krüger, Inka Harms, Andreas Fichtner, Irmhild Wolz, Robert S. Sommer
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Abstract

Most European bat species are insectivorous and share foraging areas to some extent. Where similar species rely on similar resources in the same foraging habitat, they are likely to interact. This study addresses the trophic niche of the Northern European trawling bat species Myotis dasycneme (Boie, 1825) and Myotis daubentonii (Kuhl, 1817), occurring in the same habitat, and possible interactions or differences within their dietary behaviour. Dietary data of both species were analysed to draw conclusions on their ecology, possible dietary overlap, hints for coexistence mechanisms and community structure. In this study, M. dasycneme and M. daubentonii fed mainly on Chironomidae (M. dasycneme: 44.4%; M. daubentonii: 32.8%) and Trichoptera (M. dasycneme: 20.4%; M. daubentonii: 22.2%), showing a high trophic niche overlap and similar niche breadth. Nevertheless, there were differences in the diet of the two species concerning the predation of chironomids. Differences also occur regarding the prey types, referring to the terrestrial or aquatic life-cycle of prey groups. This could be evidence for different foraging habitats and a spatial segregation of both species. High resource abundance is also likely to allow the coexistence of both species within the same hunting habitat.

© Museum and Institute of Zoology PAS
Frauke Krüger, Inka Harms, Andreas Fichtner, Irmhild Wolz, and Robert S. Sommer "High Trophic Similarity in the Sympatric North European Trawling Bat Species Myotis daubentonii and Myotis dasycneme," Acta Chiropterologica 14(2), 347-356, (1 January 2012). https://doi.org/10.3161/150811012X661666
Received: 10 February 2012; Accepted: 17 August 2012; Published: 1 January 2012
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KEYWORDS
coexistence
diet analysis
faecal samples
M. daubentonii
Myotis dasycneme
trophic niche
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