Funding for this research was provided by:
National Research, Development and Innovation Office, Hungary (OTKA #NN118194)
USA National Science Foundation (IOS #1456524)
National Geographic Society (NGS-60453R-19)
Article History
Received: 7 July 2020
Revised: 29 November 2020
Accepted: 7 December 2020
First Online: 2 January 2021
Compliance with ethical standards
:
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. Local ethical regulations and agreements were followed for fieldwork. All work complied with the Hungarian laws, and the Middle-Danube-Valley Inspectorate for Environmental Protection, Nature Conservation and Water Management, Budapest, provided permission for research (permit no. PE/KTF/17190-3/2015).
: The authors declare that they have no competing interests.