Funding for this research was provided by:
Leibniz-Institut für Zoo- und Wildtierforschung
DFG Research Training Group (2046)
Text and Data Mining valid from 2020-01-08
Received: 11 July 2019
Accepted: 29 December 2019
First Online: 8 January 2020
Ethics approval and consent to participate
: All experimental procedures were approved by the Internal Ethics Committee of the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) (permit number 2002-04-01) and the Ministry of Environment and Tourism of Namibia (permit numbers 525/2002, 700/2003, 764/2004, 939/2005, 1089/2007, 1194/2007, 1300/2008, 1392/2009, 1514/2010, 1514/2011, 1689/2012, 1813/2013, 1914/2014 and 2067/2015). All experiments were carried out in compliance with the approved guidelines of the IZW and the laws of Germany and Namibia.
: Not applicable.
: The authors declare that they have no competing interests.