Funding for this research was provided by:
Jihočeská Univerzita v Českých Budějovicích (151/2016/P)
Text and Data Mining valid from 2019-11-28
Received: 31 January 2019
Revised: 31 October 2019
Accepted: 10 November 2019
First Online: 28 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Experiments carried out in this research comply with the current laws of the Czech Republic. Authors are licenced for animal experimentation (Czech Animal Welfare Commission No. 489/01) and for conducting laboratory experiments with titmice (Ministry of Education, Youth and Sports, licence no. 8809/2011-30). Faculty of Science of the University of South Bohemia has accredited breeding of titmice (Ministry of Agriculture, licence no. 9103/2009-17210).