Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Acta Univ Latv (2008) 745: 43–52
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Environmental and
Experimental
Biology

Acta Univ Latv (2008) 745: 43–52

Orginal Article

Late summer and autumn swarming of bats at Sikspārņu caves in Gauja National Park

Jurģis Šuba1*, Viesturs Vintulis2, Gunārs Pētersons3
1Department of Zoology and Animal Ecology, Faculty of Biology, University of Latvia, Kronvalda Bulv. 4, Rīga, LV-1010, Latvia
2Museum of Zoology, University of Latvia, Kronvalda Bulv. 4, Rīga, LV-1010, Latvia
3Faculty of Veterinary Medicine, Latvian University of Agriculture, K. Helmaņa 8, Jelgava, LV-3004, Latvia
*Corresponding author, E-mail: jurgiss@imap.cc

Abstract

Late summer and autumn swarming of bats at underground hibernacula has so far been poorly investigated in the north-eastern part of Europe. This study was conducted at Sikspārņu caves in Gauja National Park in 2005 to 2007 with the main aim to determine the species composition of swarming bats and the swarming phenology for different species. Mist-nettings of swarming bats were performed once per fortnight from the end of June until the beginning of November. Altogether 3,448 bats of seven species were caught of which Myotis daubentonii and M. brandtii were the most numerous. For all species adult males predominated initially, but numbers of adult females and subadult individuals increased as the season progressed. The capture-mark-recapture method revealed an individual-specific trend of visitations by adult males of M. daubentonii in subsequent swarming seasons. Migration between different swarming and hibernation sites located at 5- to 21-km distances were also recorded.

Key words: autumn swarming, bats, Gauja National Park, Myotis brandtii, Myotis daubentonii.

 
Acta Univ Latv (2008) 745: 43–52
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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University of Latvia

 
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