Funding for this research was provided by:
FWF (P28505-B25, I3535)
University of Graz
Received: 4 July 2019
Accepted: 9 January 2020
First Online: 16 January 2020
Ethics approval and consent to participate
: The study species, <i>Tropheus duboisi</i>, is listed as vulnerable in the IUCN Red List of Threatened Species 2006. The fish used in our experiments were not collected from habitats in the wild. The <i>T. duboisi</i> “Maswa” were third-generation offspring of commercially purchased, captive bred fish. The <i>T. duboisi</i> “Kigoma” were captive-bred fish purchased from Cichlidenstadel (Alerheim, Germany; ExternalRef removed). Ethical approval for the use of <i>T. duboisi</i> in our experiment was obtained from the ethics committee of the University of Graz (approval number 39/84/63 ex 2018/19).Fish keeping and euthanasia was performed under permit BMWFW-66.007/0004-WF/V/3b/2016 issued by the Federal Ministry of Science, Research and Economy of Austria (BMWFW) in accordance with the ethical guidelines and regulations of the BMWFW.
: Not applicable.
: The authors have no competing interests to declare.