Funding for this research was provided by:
Leibniz-Institut für Gewässerökologie und Binnenfischerei
Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB) im Forschungsverbund Berlin e.V.
Received: 29 April 2021
Accepted: 29 September 2021
First Online: 6 October 2021
: Our study did not include experiments on live vertebrates. Sampling and handling of fish have been done according to the international and national guidelines for experimental animals. Fishing right owners have permitted the catching of the fish. Fish were killed by a blow on the head, following the national guidelines.
: Not applicable.
: The authors declare no competing interests.