Funding for this research was provided by:
ministry of education, youth and science
Article History
Received: 18 June 2021
Accepted: 9 March 2022
First Online: 19 March 2022
Declarations
:
: According to clause number 42, clause number 41, and appendix 2 to the clause number 41 of the Bulgarian Law on Biological Diversity, capture permits for <i>P. ridibundus</i> are not required for the aims of scientific research.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.