Funding for this research was provided by:
Grantová Agentura Ceské Republiky (17-20286S)
Received: 24 June 2020
Accepted: 24 December 2020
First Online: 18 January 2021
Compliance with ethical standards
: The authors declare no conflicts of interest.
: Collecting the bat samples from the hibernacula in the Czech Republic complied with Czech Law No. 114/1992 on Nature and Landscape Protection. The authors were authorised to handle wild bats according to the Czech Certificate of Professional Competence (No. CZ01341; §17, Czech Act No. 246/1992 Coll.). Sampling was based on permit No. SR/0007/JM/2017 issued by the Agency for Nature Conservation and Landscape Protection of the Czech Republic. Sampling in Poland was approved by the Regional Directorate for Environmental Protection in Gorzów Wielkopolski (No. WPN-I-6205.10.2015.AI). Experimental procedures were approved by the Ethical Committee of the Academy of Sciences of the Czech Republic (No. 169/2011). The II Local Ethical Commission in Wrocław approved sampling at the “Nietoperek” Natura 2000 site in Poland (No. 45/2015).